Skocz do pozycji: 1.

Tytuł:

Numerical analysis of the metal-composite joints

Autorzy:

Derewońko, A.
Cielęta, R.

Powiązania:

https://bibliotekanauki.pl/articles/243344.pdf

Data publikacji:

2008

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

metal-composite joint
FEM
contact problem
nonlinearity
aircraft structure

Opis:

The development and implementation of the new technologies and materials are one of the conditions allowing improving the aircraft structures. The composite materials enable to reduce the aircraft weight and keep appropriate strength and fatigue properties. Application of the composite materials in the wing elements, and metal alloys in assemblies of the aircraft fuselage requires elaboration of the appropriate method for technology joining metal and composite. Bonding eliminates breakages in the composite plies which are initiated during assembly process of the structure with mechanically fastened joints e.g. bolts [1]. The strength and stiffness of the composite depend on shape and direction of the fibre which carry the tensile and compression stresses. Shear stress and strength of the composite depend on the resin system. Therefore, the use of composites brings more complicated design approach compare to metal. The aim of the study is tofind appropriate method to determine the failure loading of the metal-composite aircraft wing pivot fitting. Numerical and laboratory investigations for metal-composite joints are presented. Interaction between the composite plies is modelled as the contact problem. It allows determining the strain and stress at the contact surfaces and stress concentration fields. Contact modelling technique is also applied to model interface between metal and composite. Engineering approach to the model full-scale co-curing triple stepped lap joint is presented. The professional engineering software tools are used to create accurate models. Tensile tests of the metal-composite joint were carried out to verify the numerical analysis methods.

Źródło:

Journal of KONES; 2008, 15, 1; 39-50
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

About mechanical joints design in metal - composite structure

Autorzy:

Puchała, K.
Szymczyk, E.
Jachimowicz, J.

Powiązania:

https://bibliotekanauki.pl/articles/246795.pdf

Data publikacji:

2012

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

mechanical joint
adhesive joint
FEA
aviation

Opis:

Riveting is still one of the main joining methods of thin-walled aircraft structures. Such features as simplicity of implementation, possibility of two different material connection (e.g. metallic with non-metallic ones) and the fact that is it a well-known (reliable) method causes popularity of riveting. The never-ending attempt to obtain as low mass as possible (mainly to reduce fuel consumption) is the reason for using material of high specific strength in the aerospace industry. High strength titanium or aluminium alloys (e.g. 2024T3) and composite laminates (e.g. CFRP or Glare) are examples of such materials. The article deals with methods of connecting various materials. The paper presents advantages and disadvantages of different/selected connection types. Strength prediction and failure modes of mechanical joints are described for metallic as well as for composite components. Composites are complex materials having an anisotropic structure (and anisotropic mechanical properties) leading to various failure mechanisms. Main principles for appropriate joint design of composite laminate panels (laminate configuration and typical/specific geometrical dimensions) are indicated/specified. The bearing failure mechanism is accepted to be a safe progressive one. Mechanism of bearing (generally compressive) load transfer into composite laminates by shear of the matrix is analysed. Some examples of improvement bearing strength of laminates are presented according to literature. On the base of presented examples and bearing load transfer analysis, some conclusions for an appropriate solution of this problem are drawn.

Źródło:

Journal of KONES; 2012, 19, 3; 381-390
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Investigation into Fatigue Behaviour of Metal-Composite Glue Connection

Autorzy:

Rodzewicz, M.

Powiązania:

https://bibliotekanauki.pl/articles/98008.pdf

Data publikacji:

2011

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Lotnictwa

Opis:

The paper presents the results of experimental investigations into fatigue properties of metal and CFRP-composite glued joints. The object of investigation was adhesive joints between metal sheets made from iron alloy 30HGS (popular steel in the Polish aviation industry) and CFRP orthogonal reinforced sheets made from 10 layers of SIGRATEX CE3208 pre-preg. The main adhesive was the WK-3 glue (applied in the form of 0.2 mm thin foil) while the DP-490 - liquid epoxy glue was used as technological aid for specimen manufacturing. Two kinds of specimens were prepared and tested: single-lap joints and double-lap joints. The paper presents S-N curves for both kinds of those specimens. Besides fatigue life of the glued joints, the interest was focused on the NDT tests regarding damage propagation inside the glue-connection. The paper presents several C-scans made at different stages of fatigue testing. It has been found that the damage occurs almost equally in the whole volume of the glue layer (contrary to the expectation following from the physical model of the glue-connection internal loading). The results of experiments regarding thermal effect of cyclic loading of the glued joints are also described. It has been found that this effect could be used as an important parameter for diagnostics purposes of the glued joints.

Źródło:

Fatigue of Aircraft Structures; 2011, 3; 86-102
2081-7738
2300-7591

Pojawia się w:

Fatigue of Aircraft Structures

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Failure Simulation of Metal-Composite Joints
Symulacje zniszczenia połączenia metalowo-kompozytowego

Autorzy:

Derewońko, A.

Powiązania:

https://bibliotekanauki.pl/articles/232218.pdf

Data publikacji:

2013

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych

Tematy:

failure
metal-composite bonded joint
finite element method (FEM)
awaria
metalowo-kompozytowe połączenia
metoda elementów skończonych (MES)

Opis:

The paper presents a numerical analysis method allowing the determination of the degree of failure of an adhesive joint with the use of CAE software. The results of an experimental test are used to describe properties of the joint parts. Described herein is the behaviour of a multi-stepping lap joint of metal with a multilayered fibre composite that is often used in the aircraft industry. Modelling of the contact problem between the metal surface and layer of the composite enables determination of the value of the external tensile load at which the process of failure of the joint begins. The author also proposes a simple method to shape solid finite elements which allows the elimination of the singularity around finite element vertices. The method has been applied to numerical analysis of the joint, in which the layers were stacked at various angle orientations. The influence of the step length of the metal part on the joint strength was also considered. The results of numerical analysis were compared with those of experimental investigations of the joint strength, giving satisfactory agreement.
W pracy przedstawiono metodę analizy numerycznej umożliwiającej określenie stopnia zniszczenia połączenia przy użyciu oprogramowania CAE, z wykorzystaniem wyników testów eksperymentalnych. Opisano zachowanie trójstopniowego połączenia zakładkowego metalu z wielowarstwowym kompozytem włóknistym, które jest często wykorzystywane w przemyśle lotniczym. Odwzorowanie zagadnienia kontaktu między powierzchnią metalu i warstwą kompozytu pozwala określić wartość obciążenia zewnętrznego, przy którym rozpoczyna się proces niszczenia połączenia, który jest wywołany rozciąganiem. Zaproponowano sposób ukształtowania bryłowych elementów skończonych, który pozwala wyeliminować nieciągłości występujące w obszarach naroży. Metoda została zastosowana do analizy numerycznej połączenia, w którym wielowarstwowy laminat utworzono z prepregu ułożonego pod różnymi kątami. Przeanalizowano wpływ wymiarów stopnia części metalowej na wytrzymałość połączenia. Wyniki analiz numerycznych porównano z rezultatami badań eksperymentalnych uzyskując zadowalającą zgodność.

Źródło:

Fibres & Textiles in Eastern Europe; 2013, 5 (101); 131-134
1230-3666
2300-7354

Pojawia się w:

Fibres & Textiles in Eastern Europe

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Analysis of selected parameters influence on failure in metal-composite mechanical joint

Autorzy:

Puchała, K.

Powiązania:

https://bibliotekanauki.pl/articles/242244.pdf

Data publikacji:

2014

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

mechanical joint
CRFP
aviation
FEM

Opis:

The never-ending attempt to obtain as low mass as possible is the reason for using material of high specific strength (stiffness) in the aerospace industry. High strength titanium or aluminium alloys (e.g. 2024T3) and composite laminates (e.g. CFRP or Glare) are the examples of such materials. Despite a large number of composite types, fibre reinforced composites in the form of laminates are commonly used in aircraft structures. One-half of modern aircrafts is made of composites. However, the second one is still made of metallic alloys. The usage of different materials in aircraft structures results in the necessity of joining composite and metallic components. There are three connection methods for aircraft primary structures: mechanical (riveting, bolting), adhesive (bonding) and hybrid where both mentioned methods are used. The paper deals with metal-composite mechanical joint. Although fibre reinforced composites have high tensile strength, the load transfer in mechanical joints of such components is limited. Strength of composite laminates is dependent on the joint geometry; however, it is strongly influenced by laminate lay-up. There are five global failure modes for mechanically fastened composite laminates: tension, bearing, shear-out, cleavage and pull-through. The bearing failure mechanism is a safe progressive mechanism not leading to catastrophic failure and therefore it is acceptable. Problems with strength assessment of composite mechanical joints are drawn. Some geometrical (joint width), material (bolt material, stacking sequence) as well as numerical parameters (failure criterion) are analysed.

Źródło:

Journal of KONES; 2014, 21, 1; 223-232
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Modelling coupled electric field and motion of beam of ionic polymer-metal composite

Autorzy:

Dominik, I.
Kaszuba, F.
Kwaśniewski, J.

Powiązania:

https://bibliotekanauki.pl/articles/386510.pdf

Data publikacji:

2014

Wydawca:

Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej

Tematy:

ionic polymer-metal composite
mathematical model
smart materials
model matematyczny
inteligentne materiały
kompozyt

Opis:

In this paper, a mathematical model of electromechanical transduction of Ionic Polymer-Metal Composites is presented. The aim of the research was to create a physics-based, geometrically scalable model to use in control systems. The relation between actuating voltage and the tip displacement was described with a transfer function. The model is derived from the basic physical properties of re-searched materials. To calculate the final transfer function, two impedance models are considered – with and without neglecting the re-sistance of the metal electrodes. In this paper, the model with non-zero electrode resistance is calculated. Later, the model is simplified (taking the physical properties into account) and the numerical values based on the parameters of the samples are calculated. The simpli-fications allow the model to predict the response to low-frequency sine wave actuation. The frequency-domain characteristics of the sam-ples were created experimentally and compared to the model. The results have proven the accuracy of the model.

Źródło:

Acta Mechanica et Automatica; 2014, 8, 1; 38-43
1898-4088
2300-5319

Pojawia się w:

Acta Mechanica et Automatica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Study on contact between double metal composite and pipe power slip for offshore well

Autorzy:

Wang, Y.
Ai, Z.
Shi, C.
Ai, Y.

Powiązania:

https://bibliotekanauki.pl/articles/258954.pdf

Data publikacji:

2017

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

power slip
double metal composite pipe
contact area
slip teeth
plastic damage

Opis:

The whole process of clamping offshore well double metal composite pipe was established, Reviewing the problems that in the oil and gas wells the double metal composite pipes frequently get plastic damage or even fracture failure when the power slips hold fast to the double metal composite pipe, the effect Eq. of contact area to tooth plate and double metal composite pipe was deduced, and based on the elastoplastic contact analysis theory, the theoretical Eq. was verified. For the double metal composite pipe stress, displacement and stress of drill tooth plate, influence of slip teeth plate on the double metal composite pipe damage was analyzed, The plastic damage law of the double metal composite pipe was obtained with the influence factor of the contact surface and the influence factor of the tooth crown width. the analysis showed that, The double metal composite pipe can be clamped and the contact area value of the tooth plate with the minimum damage are fixed. Several sets of teeth were produced, and then used to carry out experiments, indoor and field experiments have fully proved the accuracy of the result, The research work provides a better theoretical basis for optimal design of slip tooth plate.

Źródło:

Polish Maritime Research; 2017, S 2; 66-73
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Selected problems of electrical discharge machining (EDM) of metal composite materials applied in manufacturing of mechanical vehicles

Autorzy:

Perończyk, J.

Powiązania:

https://bibliotekanauki.pl/articles/244481.pdf

Data publikacji:

2011

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

vehicles
metal composite materials
electrical discharge machining (EDM)
electrical discharge cutting (WEDM)
surface layer (SL)

Opis:

The paper presents examples of applications for metal composite materials on Al matrix reinforced with ceramic particles in the form of grains, fibre or whiskers in the automotive industry. Highlighted are the advantages and drawbacks of such composite materials and issues involved in shaping complete parts. Presence of hard and brittle ceramic particles in the Al alloy (given their sufficient concentration) significantly impacts on the physical, chemical and mechanical properties of the material and its suitability for shaping complete parts and constituting a surface layer (SL) with required properties. In making metal composite materials of Al alloys, various (including the latest) methods of casting are applied, often in combination with press molding in semi-fluid state, as well as powder metallurgy (P/M) methods. The final machining of functionally significant surfaces is done by machining (by all ways and variants). With presence of more than 5% (by volume) ceramic reinforcing particles it becomes necessary to use cutting blades of the so-called super hard materials, including composites of polycristalline diamond and diamond. This considerably increases manufacturing costs. Electrical discharge machining has proved to be an effective way for shaping metal parts, in all its variants: sinker (EDM), wire erosion (WEDM), micromachining (ěEDM), shaping by free electrode (REDM), discharge grinding (AEDM) and other. Cited in the paper are the results of own research connected with EDM and WEDM of Al alloys composite cast and reinforced with particles of Al2O3 (AlSi7Mg + 20%Al2O3) and a composite material produced by powder metallurgy methods (P/M) reinforced with various (maximum 10%) concentrations of Al2O3 or SiC or Si3N4. EDM and WEDM technological characteristics were defined for the studied materials in the form of regressive dependencies as statistical models of given indicators allowing for defining impact of machining parameters on shaping the indicators. In addition, there are selected photos of metallographic structures, enabling observation and evaluation of surface layer phase changes and chemical composition after EDM. The highly enlarged SEM micro-photos which are included show the geometric structure of machined surface, micro-cracks on borders of the composite material grains, presence of minor reinforcement particles adhering to the surface. This confirms the complex nature of electrical discharge machining mechanism taking place locally after very high temperatures and in a very short time, in presence of cold dielectric.

Źródło:

Journal of KONES; 2011, 18, 1; 429-442
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:

Badania laboratoryjne własności mechanicznych próbek kompozytów polimerowo-metalowych IPMC
Laboratory research on mechanical features of ionic polymer metal composite IPMC

Autorzy:

Kwaśniewski, J.
Dominik, I.

Powiązania:

https://bibliotekanauki.pl/articles/386693.pdf

Data publikacji:

2011

Wydawca:

Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej

Tematy:

badania laboratoryjne
własności mechaniczne
kompozyty
laboratory investigations
mechanical properties
composite

Opis:

Polimery elektroaktywne to polimery, które pod wpływem napięcia elektrycznego zmieniają swój rozmiar lub kształt. Pojawiły się w latach ’90 XX wieku i szybko okazały się przydatnymi w wielu dziedzinach techniki. Polimery elektroaktywne cieszą się bardzo dużym zainteresowaniem środowiska naukowego w Europie i na świecie. Liczba członków organizacji ESNAM zwiększyła się niemal dwukrotnie. W Polsce jedyną placówką na liście jest Politechnika Warszawska. Nie zajmuje się ona jednak polimerami IPMC– Ionic Polymer-Metal Composite, czyli materiałem kompozytowym złożonym z polimeru przewodzącego jony, pokrytego warstwą metalu szlachetnego. W artykule przedstawiono badania podstawowe nad próbkami kompozytów polimerowo-metalowych IPMC, ze szczególnym uwzględnieniem charakterystyk statycznych, dynamicznych, czasowych oraz częstotliwościowych wraz z ich opisem matematycznym.
Electroactive polymers (EAP) are polymers, which under the voltage applying change its volume or shape. The first discovers begin in 90’s previous century and quickly were adopted into many areas of techniques. Electroactive polymers attract attention scientist not only in Europe but all over the world. The number of ESNAM organization (European Scientific Network for Artificial Muscles) which is using also EAP polymers, has increased twice recently. In Poland the only research center which is the organization member is Warsaw Polytechnic. However, it does not work on EAP polymers. In the article the basic research on the samples of ionic polymer metal composite (IPMC) which are part of EAP polymers is presented. The emphasis was put on collecting the data for the static, dynamic and frequency characteristics. On the basis of characteristics a few mathematical models of IPMC composite were proposed.

Źródło:

Acta Mechanica et Automatica; 2011, 5, 3; 65-72
1898-4088
2300-5319

Pojawia się w:

Acta Mechanica et Automatica

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:

Description of Surface Topography of Metal Matrix Composite Castings

Autorzy:

Gawdzińska, K.
Bryll, K.
Gucma, M.
Pijanowski, M.

Powiązania:

https://bibliotekanauki.pl/articles/382957.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

metal matrix composites
surface topography
profilography
confocal microscopy
atomic force microscopy (AFM)
kompozyty metalowe
topografia powierzchni
profilograf
mikroskopia konfokalna
mikroskopia sił atomowych

Opis:

The paper presents studies of topography of the metal matrix composite castings using profilography, confocal microscopy and atomic force microscopy. The examined materials were composites from the ex-situ group, manufactured by the saturation of reinforcement (aluminosilicate or carbon) with the liquid aluminum alloy (AlSi9 or AlSi11). The materials were observed on the various surface state, resulting from different stages of preparation of the polished section for the metallographic between the composite matrix and reinforcement.

Źródło:

Archives of Foundry Engineering; 2014, 14, 1 spec.; 169-174
1897-3310
2299-2944

Pojawia się w:

Archives of Foundry Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Analysis of structure and abrasion resistance of the metal composite based on an intermetallic FeAl phase with VC and TiC precipitates

Autorzy:

Kopyciński, D.
Guzik, E.
Gilewski, R.
Szczęsny, A.
Dorula, J.

Powiązania:

https://bibliotekanauki.pl/articles/379554.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

aluminium cast iron
Al4C3
TiC
VC
intermetallic FeAl
iron aluminides
aluminium
żeliwo
faza międzymetaliczna FeAl
aluminidek żelaza

Opis:

Metal alloys with matrix based on an Fe-Al system are generally considered materials for high-temperature applications. Their main advantages are compact crystallographic structure, long-range ordering and structural stability at high temperatures. These materials are based on an intermetallic phase of FeAl or Fe₃Al, which is stable in the range from room temperature up to the melting point of 1240°C. Their application at high temperatures is also beneficial because of the low cost of production, very good resistance to oxidation and corrosion, and high mechanical strength. The casting alloy the structure of which includes the FeAl phase is, among others, high-aluminium cast iron. This study has been devoted to the determination of the effect of vanadium and titanium on the transformation of the high-aluminium cast iron structure into an in-situ FeAl-VC composite.

Źródło:

Archives of Foundry Engineering; 2013, 13, 3; 51-54
1897-3310
2299-2944

Pojawia się w:

Archives of Foundry Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Influence of Heat Treatment on Abrasive Wear Resistance of Silumin Matrix Composite Castings

Autorzy:

Gawdzińska, K.
Bryll, K.
Nagolska, D.

Powiązania:

https://bibliotekanauki.pl/articles/352168.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

metal composite castings
thermal treatment
tribology
aluminium alloy

Opis:

The authors attempted at examining the effect of heat treatment on abrasive wear resistance of metal composite castings. Metal matrix composites were made by infiltrating preforms created from unordered short fibers (graphite or silumin) with liquid aluminium alloy AlSi12(b). Thus prepared composites were subject to solution heat treatment at a temperature of 520°C for four hours, then aging at a temperature of 220°C for four hours. Abrasion resistance of the material was tested before and after thermal treatment.

Źródło:

Archives of Metallurgy and Materials; 2016, 61, 1; 177-182
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:

The role of innovative composite materials in the safe and efficient operation of floating marine structures

Autorzy:

Grabian, J.
Ślączka, A.
Pawłowska, P.
Kostrzewa, W.

Powiązania:

https://bibliotekanauki.pl/articles/134918.pdf

Data publikacji:

2017

Wydawca:

Akademia Morska w Szczecinie. Wydawnictwo AMSz

Tematy:

metal composite materials
application
transport
safety
structures
properties

Opis:

This work indicates that new and innovative materials used in the construction of floating and stationary marine structures can contribute to increased operational safety in addition to reduced service costs and frequency and other reduced operating costs, including the costs of staff and running maintenance. Such materials include metal-ceramic composites whose properties, such as high resistance to abrasive wear, favourable coefficient of friction, good thermal conductivity and low thermal expansion, allow them to be used in tribological pairs in mechanisms, control elements and actuators of various devices operating in marine power plants, thereby increasing their operational reliability. Properties of metal-ceramic composite foams, i.e. vibration and noise damping, good thermal insulation performance, dissipation of electromagnetic waves and absorption of explosive energy, make them ideal for use in shipbuilding and construction of drilling towers, at the same time increasing the levels of comfort during operation. Composite metal-ceramic foams can significantly reduce the effects of fires as they are durable, water-resistant and creep resistant thermal insulators which can limit the destruction (deformation) of steel structures. This paper presents proposals for the application of these materials to selected technical solutions in offshore structures.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 52 (124); 23-29
1733-8670
2392-0378

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Szczecinie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Fabrication of ZrO2-Ti Composites by Slip Casting Method

Autorzy:

Łada, P.
Falkowski, P.
Miazga, A.
Konopka, K.
Szafran, M.

Powiązania:

https://bibliotekanauki.pl/articles/351354.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

ceramic-metal composite
titanium
zirconium oxide
slip-casting

Opis:

Slip casting is one of the most popular shaping method in ceramic technology which allows producing a large number of elements in small period of time. This shaping technique gives a possibility to fabricate ceramic or composite materials such as ZrO_2-Ti. Ti with its properties (low density, high melting point, high-temperature strength, good corrosion resistance and others) combine with ZrO₂ (high flexure strength, high compression resistance and very high K_IC) can be considered for different applications as constructional and functional materials. For the preparation of such composite nanometric zirconium oxide powder stabilized by 3 mol% Y₂O₃ and micrometric titanium powder were used. Water-based slurries with 35, 40, 45 and 50 vol.% solid phase content were prepared with 3, 10 and 15 vol.% addition of titanium powder. Zeta potential and pH of prepared slurries were considered. The pH changes were tested as a function of Ti content. The viscosity of the prepared slurries was measured. The sedimentation tests for selected slurries were performed. The casting rate for slurry of 35% solid phase with 10 vol.% Ti was examined. These measurements showed good stability of slurries. With the increasing of the solid phase concentration the density of the green bodies increased. However, the increase of the content of Ti powder reduced the density of green body samples. For selected samples the SEM observations was carried out. Composites produced by slip casting were characterized by a homogenous distribution of Ti particles in the ZrO₂ matrix.

Źródło:

Archives of Metallurgy and Materials; 2016, 61, 2B; 1095-1100
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Radiation Shielding Effect of Boron Carbide Aluminum Metal Matrix Composite

Autorzy:

Akkaş, A.
Tugrul, A.
Addemir, O.
Marşoğlu, M.
Ağacan, B.
Büyük, B.

Powiązania:

https://bibliotekanauki.pl/articles/1401221.pdf

Data publikacji:

2015-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

25.20.Dc

Opis:

Boralyn (Al/B₄C) composite material is produced chiefly of boron carbide and aluminum. Boron Carbide is an important material for the nuclear industry due to high neutron absorption cross-section. This composite is used as shielding materials to absorb neutrons in the nuclear reactors and control road materials. In this study we investigated Al/B₄C composites against gamma radiation. For that purpose, 5 wt.%, 10 wt.%, 15 wt.% and 20 wt.% reinforcement content were investigated. Cs-137 gamma radioisotope source which has 662 keV gamma energy photons were used. For each material, linear and mass attenuation coefficients were calculated. Theoretical mass attenuation coefficients were calculated from XCOM computer code. The theoretical results were compared with experimental results. The results were showed that increasing the amount of Boron Carbide compound content of boralyn composite material decrease the linear and mass attenuation coefficient of materials

Źródło:

Acta Physica Polonica A; 2015, 127, 4; 947-949
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Zastosowanie lekkich elementów z kompozytów polimerowych i metalowych w budowie środków transportu
Application of lightweight polymer and metal composite elements in the transportation

Autorzy:

Koniuszewska, A.
Naplocha, K.
Kaczmar, J. W.

Powiązania:

https://bibliotekanauki.pl/articles/253475.pdf

Data publikacji:

2015

Wydawca:

Instytut Naukowo-Wydawniczy TTS

Tematy:

transport
pojazd
kompozyt
vehicle
composite

Opis:

W pracy scharakteryzowano właściwości i możliwości zastosowania materiałów kompozytowych w budowie środków transportu. Omówiono zarówno materiały kompozytowe na osnowie polimerowej jak i na osnowie stopów metali. Zestawiono najnowsze przykłady zastosowania materiałów kompozytowych w transporcie.
The paper characterizes the properties and application of composite materials in the means of transportation. There are discussed the Polymer Matrix Composites and the Metal Matrix Composites as well. It presents the actual examples of the application of composite materials in the transportation.

Źródło:

TTS Technika Transportu Szynowego; 2015, 12; 2650-2656
1232-3829
2543-5728

Pojawia się w:

TTS Technika Transportu Szynowego

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 17.

Tytuł:

Study of Thermal Properties of Cast Metal-Ceramic Composite Foams

Autorzy:

Gawdzińska, K.
Chybowski, L.
Przetakiewicz, W.

Powiązania:

https://bibliotekanauki.pl/articles/382873.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

casting material
foundry technology
metal composite foam
ceramic composite foam
thermal properties
materiał odlewniczy
technologia odlewnicza
piana metalowa
piana ceramiczna
piana kompozytowa
właściwości termiczne

Opis:

Owing to its properties, metallic foams can be used as insulation material. Thermal properties of cast metal-ceramic composite foams have applications in transport vehicles and can act as fire resistant and acoustic insulators of bulkheads. This paper presents basic thermal properties of cast and foamed aluminum, the values of thermal conductivity coefficient of selected gases used in foaming composites and thermal capabilities of composite foams (AlSi11/SiC). A certificate of non-combustibility test of cast aluminum-ceramic foam for marine applications was included inside the paper. The composite foam was prepared by the gas injection method, consisting in direct injection of gas into liquid metal. Foams with closed and open cells were examined. The foams were foaming with foaming gas consisting of nitrogen or air. This work is one of elements of researches connected with description of properties of composite foams. In author's other works acoustic properties of these materials will be presented.

Źródło:

Archives of Foundry Engineering; 2017, 17, 4; 47-50
1897-3310
2299-2944

Pojawia się w:

Archives of Foundry Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Identification of structural defects of metal composite castings with the use of elastic waves
Identyfikacja defektów struktury metalowych odlewów kompozytowych za pomocą fal sprężystych

Autorzy:

Bejger, A.
Gawdzińska, K.

Powiązania:

https://bibliotekanauki.pl/articles/354088.pdf

Data publikacji:

2011

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

emisja akustyczna
transformacja falkowa
jakość odlewów kompozytowych
acoustic emission
wavelet transform
quality of composite castings

Opis:

The method of elastic wave propagation was applied to detect defects in composite castings (ingots). If a defect occurs, which is detected by the radiography, elastic wave propagation changes locally, i.e. causes disturbance of elastic wave propagation. Methods of signal analysis based on wavelet decomposition were used. Calculations related with wavelet analysis were made in the MATLAB environment using standard Wavelet Toolbox functions.
Wykorzystano metodę badań bazującą na propagacji fal sprężystych do wykrywania wad odlewów kompozytowych. Poddano obserwacji lokalne zmiany propagacji fali sprężystej podczas analizowania defektów, których występowanie potwierdzono za pomocą defektoskopii radiologicznej. Zastosowano metody analizy sygnałów oparte na dekompozycji falkowej. Obliczenie transformat falkowych wykonano w środowisku MATLAB z wykorzystaniem standardowych funkcji Wavelet Toolbox.

Źródło:

Archives of Metallurgy and Materials; 2011, 56, 1; 129-133
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Modified hagg and sankey metod to estimate the ballistic behaviour of lightweight metal/composite/ceramic armour and a fuselage skin of an aircraft

Autorzy:

Klimaszewski, S.
Woch, M.

Powiązania:

https://bibliotekanauki.pl/articles/247835.pdf

Data publikacji:

2012

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

reliability
ballistic shield
bullets perforation

Opis:

Hagg and Sankey method assesses the functionality of containment rings, which prevent perforation of an aircraft's elements from turbine engine disc fragments after disc burst. However, the method assumption was based on studies of mechanism of destruction of ballistic shields made of among others ceramics, by small arms bullets. The hard ceramic facing of the ballistic shield blunts the projectile and breaks up the projectile's hard core used for armour piercing. As an impact result, a conoid of finely pulverized ceramic dust is formed, absorbing energy in the formation process. The dust, containing the remnants of the projectile's energy hits the backing, but is now spread over a larger area. With backings made of fibre, energy is absorbed in stretching, breaking and delamination. With backings made of ductile metal, energy is absorbed in elastic deformation. Modification of the method consisted of taking into account the stratification of the ceramic-metal composite and the occurrence of an aircraft stiffened skin, in order to better assess the effectiveness of ballistic shields. The concept of estimating the resistance was based on the described destruction mechanism, where the object of analysis is a metal containment ring with an additional ceramic protective ballistic shield. A comparison of two scenarios- with and without an additional 2 mm aluminum alloy skin was taken into account. For this particular scenario, results were sufficient for both of the two analyzed endurance criteria.

Źródło:

Journal of KONES; 2012, 19, 2; 245-252
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Technika wytwarzania bezadhezyjnych połączeń metal-kompozyt (BPMK) w strukturach z preimpregnatów VBO
Manufacturing method of non adhesive metal-composite joint for VBO preimpregnates structures

Autorzy:

Świtkiewicz, R.
Frączek, W.
Marjanowski, J.

Powiązania:

https://bibliotekanauki.pl/articles/278019.pdf

Data publikacji:

2014

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Inżynierii Materiałów Polimerowych i Barwników

Tematy:

połączenie bezadhezyjne
połączenie metal-kompozyt
preimpregnat
prepreg
VBO
BPMK
wytwórnia lotnicza
statek powietrzny
non-adhesive joint
metal-composite joint
pre-impregnated
manufacture aircraft
aircraft

Opis:

W artykule opisano technikę wykonywania bezadhezyjnych połączeń metal-kompozyt w strukturach nośnych z preimpregnatów utwardzanych poza autoklawem. Omówiono problem formowania tych struktur z prepregów, odnosząc się przy tym do techniki kontaktowej - na mokro. Przedstawiono założenia i wymagania dla procesu wykonania połączenia z uwzględnieniem specyficznych właściwości preimpregnatów. Opisano proces technologiczny, jaki został opracowany i pomyślnie zastosowany do wykonania elementów badawczych, zwracając uwagę na decydujący wpływ czynnika ludzkiego na prawidłowe wykonanie połączenia.
Manufacturing method of non adhesive metal-composite joint for primary structures made of VBO preimpregnates were described and discussed. The problem of forming such structures was presented regarding to composites fabricated by wet lay-up method. Taking into account specific features of preimpregnates, assumptions and requirements for manufacturing process of non adhesive metal-composite joint were defined. Manufacturing process, which has been designed and used for fabricate test elements, was described. Human factor was recognized as primary factor determining the correctness of joint.

Źródło:

Przetwórstwo Tworzyw; 2014, [R.] 20, nr 6 (162), 6 (162); 526-529
1429-0472

Pojawia się w:

Przetwórstwo Tworzyw

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Anisotropic in Situ Metal Matrix Composite Reinforced with VC Carbide Fibres

Autorzy:

Kawalec, M.
Górny, M.
Sikora, G.

Powiązania:

https://bibliotekanauki.pl/articles/381579.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

cast composite
directional solidification
vanadium eutectic
vanadium carbide
microstructure
kompozyt odlewany
krzepnięcie kierunkowe
węglik wanadu

Opis:

A eutectic reaction is a basic liquid-solid transformation, which can be used in the fabrication of high-strength in situ composites. In this study an attempt was made to ensure directional solidification of Fe-C-V alloy with hypereutectic microstructure. In this alloy, the crystallisation of regular fibrous eutectic and primary carbides with the shape of non-faceted dendrites takes place. According to the data given in technical literature, this type of eutectic is suitable for the fabrication of in-situ composites, owing to the fact that a flat solidification front is formed accompanied by the presence of two phases, where one of the phases can crystallise in the form of elongated fibres. In the present study an attempt was also made to produce directionally solidifying vanadium eutectic using an apparatus with a very high temperature gradient amounting to 380 W/cm at a rate of 3 mm/h. Alloy microstructure was examined in both the initial state and after directional solidification. It was demonstrated that the resulting microstructure is of a non-homogeneous character, and the process of directional solidification leads to an oriented arrangement of both the eutectic fibres and primary carbides.

Źródło:

Archives of Foundry Engineering; 2015, 15, 1; 21-24
1897-3310
2299-2944

Pojawia się w:

Archives of Foundry Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Modelling of damage evolution in adhesive metal-composite structures for various joint designs
Modelowanie ewolucji uszkodzenia w adhezyjnych układach metal-kompozyt dla różnej geometrii połączenia

Autorzy:

Konchakova, N.
Mueller, R.
Barth, F. J.

Powiązania:

https://bibliotekanauki.pl/articles/368982.pdf

Data publikacji:

2011

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

uszkodzenie
analiza MES
lepkosprężystość
model uszkodzenia typu Lemaitre'a
połączenie metal-kompozyt
damage
finite element analysis
viscoelasticity
Lemaitre-type damage
metal-composite joint

Opis:

A viscoelastic model with the Lemaitre-type damage is applied to simulate the mechanical behaviour of the contact zone of an adhesive aluminum/fiber-reinforced polymer specimen. The damage evolution in this light weight engineering structure is investigated. The joints of aluminium alloy 5754 (AA5754) and carbon fibre reinforced thermoplastic composite CF-PA66 are manufactured by means of adhesion with an epoxy (1K-EP). The contact zone is considered as an interface material. The aim of the research is to study the influence of the interface geometry on the mechanical characteristics of the structure. The finite element method is used to simulate the complex processes in the joint. The aluminium substrate is modeled as an elastoplastic continuum with linear (isotropic) hardening. The polymer composite possesses an orthotropic elastic behaviour. A solid interface approach is used for the discretisation of the damage domain. It is shown that damage evolution depends on the geometry of the interface. The present work contains the numerical analysis of fracture processes in adhesive specimens with square, rectangular- and circle-shaped geometry of the joint.
Lepkosprężysty model z uszkodzeniem typu Lemaitre'a jest stosowany w symulacji zachowania strefy kontaktu adhezyjnego w próbce glinu połączonego z polimerem zbrojonym włóknami. Badana jest ewolucja uszkodzenia w takiej lekkiej konstrukcji. Połączenia stopu glinu AA5754 i termoplastycznego kompozytu zbrojonego włóknami węglowymi CF-PA66 są wykonywane przy użyciu epoksydowej warstwy adhezyjnej 1K-EP. Strefa kontaktu jest traktowana jako materiał interfejsowy. Celem badań jest analiza wpływu geometrii interfejsu na własności mechaniczne próbki. Metoda elementów skończonych służy do symulacji skomplikowanych procesów zachodzących w połączeniu. Glin jest modelowany jako materiał sprężysto-plastyczny z liniowym wzmocnieniem izotropowym. Kompozyt polimerowy wykazuje ortotropowe zachowanie sprężyste. Przy dyskretyzacji warstwy adhezyjnej wykazującej uszkodzenie stosowane jest podejście interfejsu ciał stałych. Pokazano, że ewolucja uszkodzenia zależy od geometrii tego interfejsu. Praca zawiera analizę numeryczną procesu destrukcji próbek z kwadratowym, prostokątnym i okrągłym kształtem strefy adhezyjnej.

Źródło:

Mechanics and Control; 2011, 30, 4; 213-220
2083-6759
2300-7079

Pojawia się w:

Mechanics and Control

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 23.

Tytuł:

Corrosion Behavior of in-Situ AlB₂/Al-Cu Metal Matrix Composite

Autorzy:

Elcicek, H.
Savaş, Ö.
Aydin, Z.
Özdemir, O.
Kayikci, R.

Powiązania:

https://bibliotekanauki.pl/articles/1398744.pdf

Data publikacji:

2016-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.05.Bx

Opis:

The aim of this study was to fabricate 30 wt.% AlB₂/Al-Cu composites using in-situ casting processes and to investigate the corrosion behavior of the composites and of the matrix material in various media. The electrochemical parameters were obtained from potentiodynamic polarization curves. The composites were prepared by liquid reaction of aluminum matrix with boron oxide at 1400°C. The results show that the corrosion resistance of the composite was higher than that of the matrix in selected corrosion media. The anodic corrosion current density values were decreased by reinforcing AlB₂ particles.

Źródło:

Acta Physica Polonica A; 2016, 129, 4; 661-664
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Wybrane zastosowania kompozytów w wojsku
Selected applications of composites in the military

Autorzy:

Błachnio, Józef
Chalimoniuk, Marek
Nidzgorska, Adrianna

Powiązania:

https://bibliotekanauki.pl/articles/38952238.pdf

Data publikacji:

2023

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

kompozyt metalowy
kompozyt polimerowy
kompozyt ceramiczny
metal composite
polymer composite
ceramic composite

Opis:

W artykule przedstawiono problematykę dotyczącą zastosowania nowych rozwiązań konstrukcyjnych z wykorzystaniem materiałów kompozytowych, na szeroko rozumiane potrzeby wojska. Pokrótce przedstawiono charakterystykę kompozytów i ich właściwości, wyszczególniając ich liczne zalety, a także niedostatki. Omówiono nowe konstrukcje podzespołów samolotów, śmigłowców oraz zasygnalizowano wzrost udziału kompozytów polimerowych w lotnictwie wojskowym i cywilnym. Przedstawiono zastosowanie kompozytów do ochrony żołnierza: elastyczną kamizelkę kompozytową i hełm, do ochrony przed promieniowaniem mikrofalowym, jak również egzoszkielet żołnierza ułatwiający operacje na polu działań. Podkreślono możliwości szerokiego zastosowania materiałów kompozytowych w różnych gałęziach przemysłu.
The article presents the issue of applying new design solutions from composite materials for military needs. The article also includes composites’ characteristics and properties, underlining their benefits and deficiencies. New aircraft and helicopter subassembly designs were demonstrated, and an increased use of polymer composites in civil and military aviation was mentioned. In addition, the application of composites used for the soldier’s protection in the form of elastic composite west, helmet against microwave radiation was depicted, as well as the soldier’s exoskeleton to facilitate operations on the field. Composites are future-oriented materials applied in civil and military areas due to their properties.

Źródło:

Journal of KONBiN; 2023, 53, 4; 191-209
1895-8281
2083-4608

Pojawia się w:

Journal of KONBiN

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 25.

Tytuł:

Charakterystyki tribologiczne skojarzeń kompozyt metalopolimerowy - kompozyt
Tribological characteristics of metal-polymer composite - composite junction

Autorzy:

Pawelec, Z.

Powiązania:

https://bibliotekanauki.pl/articles/188851.pdf

Data publikacji:

2010

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

kompozyt termoutwardzalny
napełniacze
właściwości wytrzymałościowe
tarcie
zużycie
współczynnik tarcia
thermosetting composite
fillers
strength properties
friction
abrasion
friction coefficient

Opis:

W artykule przedstawiono wyniki badań właściwości wytrzymałościowych, cieplnych i tribologicznych kompozytów chemo- i termoutwardzalnych o różnych składach jakościowych i ilościowych. Jako napełniacze kompozytów termoutwardzalnych zastosowano proszki miedzi i brązu o określonym składzie chemicznym i granulometrycznym, napełniaczem kompozytu chemoutwardzalnego był proszek żelaza. Materiały kompozytowe na osnowie termoutwardzalnej żywicy fenolowo-formaldehydowej wytwarzano metodą prasowania w ogrzewanej formie z wykorzystaniem prasy hydraulicznej. Właściwości wytrzymałościowe i cieplne kompozytów zbadano zgodnie z wymogami PN EN ISO na maszynie wytrzymałościowej Instron z komputerową rejestracją i archiwizacją wyników badań, twardościomierzu Brinella, młocie Charpe'go i dylatometrze Cosfelda. Charakterystyki tribologiczne różnych skojarzeń materiałowych wyznaczono na testerze T-05 typu rolka–klocek w styku rozłożonym. Rolka stalowa lub z warstwą chemoutwardzalnego kompozytu metalopolimerowego, usieciowanego i obrobionego mechanicznie współpracowała z przeciwpróbką wykonaną z brązu i kompozytów termoutwardzalnych. W przyjętych warunkach badań skojarzenie kompozyt–kompozyt wykazuje mniejsze zużycie i współczynnik tarcia niż typowe skojarzenie stal–brąz.
The paper presents the results of strength, heat and tribological properties of chemically setting and thermosetting composites with different configurations of qualitative and quantitative compositions. Copper and bronze powders of defined chemical and granulometric composition were used as composite fillers. Iron powder was used as a chemically-setting composite filler. Thermosetting phenol-formaldehyde resin based composites were produced by a heated press using a hydraulic press. The strength and heat properties of the composites were tested according to PN EN ISO standards. The tests were performed on hydraulic strength machine Intsron, Brinell hardness tester, Charpy's impact test stand, and Coesfeld dilatometer. The tribological characteristics of different material junctions were measured in conformed contact by a T-05 black-on-ring tester. A steel roller or roller coated by cross-linking and machined to the desired size of chemically setting metal-polymer composite were cooperating with bronze and thermosetting composite based counter specimen. In predetermined test conditions, the composite – composite conjunction shows less abrasion and a lower friction coefficient than a typical steel – bronze junction.

Źródło:

Tribologia; 2010, 5; 105-116
0208-7774

Pojawia się w:

Tribologia

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 26.

Tytuł:

Shielding Effect of Boron Carbide Aluminium Metal Matrix Composite against Gamma and Neutron Radiation

Autorzy:

Akkas, A.
Tugrul, A.
Buyuk, B.
Addemir, A.
Marsoglu, M.
Agacan, B.

Powiązania:

https://bibliotekanauki.pl/articles/1401960.pdf

Data publikacji:

2015-08

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

25.20.Dc

Opis:

In this study, boralyn (boron carbide-aluminum metal matrix composite material - Al/B₄C) composite materials were investigated on shielding effect against gamma and neutron radiations. The samples were prepared as 5 wt%, 10 wt%, 15 wt%, and 20 wt% reinforcement content and for each content of material has composed in five different average particle sized (3 μm, 53 μm, 113 μm, 200 μm, and 500 μm). Linear and mass attenuation coefficients were calculated experimentally for each composite material against Cs-137 gamma source. Theoretical mass attenuation coefficients of material were calculated by using XCOM computer code. Then the theoretical results were compared with experimental results. Then, macroscopic cross-section values were calculated experimentally for each composite material against Pu-Be neutron source. As the conclusion of the study, it could be understood that in spite of decrease of the attenuation coefficient against gamma radiation, the adding materials give rise to increase the shielding ability of material against neutron radiation.

Źródło:

Acta Physica Polonica A; 2015, 128, 2B; B-176-B-179
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Comparison of various tool wear prediction methods during end milling of metal matrix composite

Autorzy:

Wiciak, M.
Twardowski, P.
Wojciechowski, S.

Powiązania:

https://bibliotekanauki.pl/articles/94174.pdf

Data publikacji:

2018

Wydawca:

Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej

Tematy:

tool wear
diagnosis
milling
metal matrix composite
zużycie narzędzi
diagnoza
kompozyt metalowy

Opis:

In this paper, the problem of tool wear prediction during milling of hard-to-cut metal matrix composite Duralcan™ was presented. The conducted research involved the measurements of acceleration of vibrations during milling with constant cutting conditions, and evaluation of the flank wear. Subsequently, the analysis of vibrations in time and frequency domain, as well as the correlation of the obtained measures with the tool wear values were conducted. The validation of tool wear diagnosis in relation to selected diagnostic measures was carried out with the use of one variable and two variables regression models, as well as with the application of artificial neural networks (ANN). The comparative analysis of the obtained results enabled the selection of the most effective tool wear prediction method.

Źródło:

Archives of Mechanical Technology and Materials; 2018, 38; 1-7
2450-9469

Pojawia się w:

Archives of Mechanical Technology and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Ograniczenie wyginania płytki IPMC na kierunku prostopadłym do płaszczyzny zginania
Reduction IPMC plate bending across main bending plane

Autorzy:

Oracz, M.

Powiązania:

https://bibliotekanauki.pl/articles/98813.pdf

Data publikacji:

2010

Wydawca:

Politechnika Śląska. Katedra Biomechatroniki

Tematy:

płytka IPMC
sztuczny mięsień
kompozyt polimer-metal
zginanie
IPMC plate
artificial muscle
polymer-metal composite
bending

Opis:

Jednym z problemów w sterowaniu płytką z IPMC jest jej wyginanie na kierunku prostopadłym do płaszczyzny zginania. W tym celu przeprowadzone zostały symulacje MESowe z różnymi typami użebrowania.
One of problems IPMC plate modeling is bending across main bending plane. To mange the problem some simulations with different finning were calculated.

Źródło:

Aktualne Problemy Biomechaniki; 2010, 4; 147-150
1898-763X

Pojawia się w:

Aktualne Problemy Biomechaniki

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

O specyfice zużywania metalopolimerowego kompozytu termoutwardzalnego
About specific wearing of thermosetting metal-polymer composite

Autorzy:

Janecki, J.
Pawelec, Z.
Drabik, J.
Wolszczak, M.

Powiązania:

https://bibliotekanauki.pl/articles/189263.pdf

Data publikacji:

2009

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

kompozyt metalopolimerowy termoutwardzalny
żywica chemoutwardzalna
tarcie
zużycie
thermosetting metal-resinous composite
chemico-setting resin
friction
wear

Opis:

W artykule przedstawiono wyniki badań nad opracowaniem kompozytu termoutwardzalnego na elementy łożysk ślizgowych. Badaniom poddano kompozyty o zróżnicowanych składach chemicznych. Omówiono wpływ chemoutwardzalnej żywicy epoksydowej na charakterystyki tribologiczne kompozytów fenolowo-formaldehydowych. Zbadano oddziaływanie temperatury prasowania na odporność cieplną oznaczaną za pomocą różnicowej kalorymetrii skaningowej (DSC) i zużycie skojarzenia kompozyt termoutwardzalny–stal. Charakterystyki tribologiczne kompozytów wyznaczono na testerze T-05 typu rolka–klocek. Do identyfikacji zmian w składzie eksploatacyjnej warstwy wierzchniej elementów modelowego węzła tarcia wykorzystano skaningową mikroskopię elektronową (SEM).
In the article investigation results of the formation thermosetting composite on sliding bearings are presented. Composites of the different chemical composition were investigated. Influences of chemosetting epoxy matrix on the tribological characteristic phenol- formaldehyde composites were discussed. Impact of the pressing temperature on the thermal stability determined by differential scanning calorimetry (DSC) and wear of thermosetting composites – steel friction pair were determined. The tribological composite characteristics were measured using tester T-05 (the tester of type the roll–block). For identification of changes in the surface layer of the model friction pair a scanning electron microscope (SEM) was used.

Źródło:

Tribologia; 2009, 6; 29-43
0208-7774

Pojawia się w:

Tribologia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Quality features of metal matrix composite castings
Cechy jakości odlewów z metalowych materiałów kompozytowych

Autorzy:

Gawdzińska, K.

Powiązania:

https://bibliotekanauki.pl/articles/353101.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

quality features
casting
metal matrix composites
cechy jakości
odlewy
metalowe odlewy kompozytowe

Opis:

In this paper it is stated, that a set of quality features of metal matrix composite castings differs from the same set for castings of classic materials, although some features are common for both of these material groups. These features (pertaining to a set of quality characteristics of composite castings) have been named as specific, they have not been determined yet and a description of material quality should be performed (according to the qualitology) on a principle of description of quality characteristics of this product. Therefore, this set of features has been determined. It was proposed to add the following characteristics to the set of specific features of composite castings quality: matrix material, reinforcement material, binding between components and porosity of the composite casting. In this set a sub-set of quality characteristics of composite castings was also determined.
Stwierdzono, że zbiór cech jakości metalowych odlewów kompozytowych różni się od zbioru cech jakości odlewów z materiałów klasycznych, choć niektóre cechy są zbieżne dla obu tych grup materiałowych. Cechy te (należące do zbioru cech jakości odlewów kompozytowych) nazwano specyficznymi, nie były one dotychczas określone, a opis jakości materiałów powinien odbywać się (w myśl kwalitologii) na zasadzie opisu cech jakości tego wyrobu. Określono zatem ten zbiór cech. Zaproponowano, aby do zbioru specyficznych cech jakości odlewów kompozytowych zaliczyć: materiał osnowy, materiał zbrojenia, połączenie pomiędzy komponentami i porowatość odlewu kompozytowego. W zbiorze tym określono również podzbiór cech jakości odlewów kompozytowych.

Źródło:

Archives of Metallurgy and Materials; 2013, 58, 3; 659-662
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Evaluation of the Cause and Consequences of Defects in Cast Metal-Ceramic Composite Foams

Autorzy:

Popielarski, P.
Sika, R.
Czarnecka-Komorowska, D.
Szymański, P.
Rogalewicz, M.
Gawdzińska, K.

Powiązania:

https://bibliotekanauki.pl/articles/2079776.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

foams
composites
casting
defects

Opis:

In this research, the quality of manufactured cast metal-ceramic foams (manufactured using blowing gas) was tested. The causes responsible for defect formation in the composite foams and their consequences were analyzed using the FMEA (Failure Mode and Effects Analysis) method, which is a useful tool for minimizing losses caused by low product quality. This method involves analytically determining correlations between the cause and consequences of potential product defects, and it takes into account the criticality factor (risk). The FMEA analysis showed that pore breaks were the most "critical defect" (with the highest number of effects on the product, the Risk Priority Number, affecting the quality of the composite foam). The second most critical defect was discontinuities in the foam frame structure. Destruction or damage to the foam structure (although very rare) deprived the composite foam of its primary function, which is to reinforce the product. The third most critical defect was non-uniform foam pore size.

Źródło:

Archives of Foundry Engineering; 2021, 21, 1; 81-88
1897-3310
2299-2944

Pojawia się w:

Archives of Foundry Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Quality of the recovered metal matrix as a measure of the efficiency of the MMC recycling process

Autorzy:

Gawdzińska, K.
Nagolska, D.
Kochmańska, A.

Powiązania:

https://bibliotekanauki.pl/articles/359859.pdf

Data publikacji:

2013

Wydawca:

Akademia Morska w Szczecinie. Wydawnictwo AMSz

Tematy:

casting
metal matrix composite (MMC)
material recycling

Opis:

Quality of composite castings with infiltration reinforcement is dependent on many various factors. Technological parameters of the saturation process, manufacturing methods and quality of components are considered as the basic ones. During the recycling process of composite materials, the basic component that is being reclaimed is the metal matrix. The main aim of this paper is an evaluation of chemical composition and microstructure of the recovered metal matrix material. In the first stage, influence of preparation of liquid matrix metal is analyzed, with particular attention paid to its purity, degree of degassing and overheating, as well as an influence of the reinforcing material type on the final structure of composites obtained in the process of vacuum saturation. Specific of the structure and flaws occurring in such materials are of the particular concern here, as they are decisive for the methods of quality evaluation of these materials. Manufactured composite’s castings are subjected to the recycling process by a melting of the metal matrix on the second stage. The metal obtained in this way is analyzed regarding impurities occurring in its volume and, simultaneously, a comparison of evaluation methods of traditional metal alloys and metal composite castings is performed.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 36 (108) z. 2; 37-44
1733-8670
2392-0378

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Szczecinie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Numerical calculations of RVE dimensions for two-phase material

Autorzy:

Miedzińska, D.
Niezgoda, T.

Powiązania:

https://bibliotekanauki.pl/articles/242298.pdf

Data publikacji:

2011

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

microstructure
two-phase material
metal-ceramic composite
RVE

Opis:

A representative volume element (RVE) is a statistical representation of typical material properties. It should contain enough information on the microstructure thereby be sufficiently smaller than the macroscopic structural dimensions. The paper deals with the numerical calculations of the dimensions of the RVE for a two-phase material microstructure. Two and three dimensional models are taken into consideration. The structure of the samples are developed on the base of randomization of elements belonging to one of the phases. The phases volume share is 50/50%. The following series of the models are analyzed: from 10 x 10 to 100 x 100 elements for 2D samples and from 10 x 10 x 10 to 100 x 100 x 100 elements for 3D samples. The element characteristic dimension is 10 jm. The elastic behavior of the base materials (magnesium and alumina) is taken into account. The quasi-static compression tests of the developed structures are carried out with the use of LS-DYNA computer code. The results are presented as the equivalent Young modulus values and compared to the calculations based on the rule of mixtures. The stabilization of the achieved results allows to assess the dimensions of the RVE for two-phase material with random distribution.

Źródło:

Journal of KONES; 2011, 18, 2; 303-310
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Aluminum Metal Matrix Composites with SiC, Al₂O₃ and Graphene – Review

Autorzy:

Aybarc, U.
Dispinar, D.
Seydibeyoglu, M. O.

Powiązania:

https://bibliotekanauki.pl/articles/380332.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

SiC
Al2O3
graphene
aluminum metal matrix composite
metal matrix composite
grafen
kompozyt osnowy metalowej
kompozyt metalowy

Opis:

Light weight, low density with high mechanical properties and corrosion resistance, aluminum is the most important material and is commonly used for high performance applications such as aerospace, military and especially automotive industries. The researchers who participate in these industries are working hard to further decrease the weight of end products according to legal boundaries of greenhouse gases. A lot of research was undertaken to produce thin sectioned aluminum parts with improved mechanical properties. Several alloying element addition were investigated. Yet, nowadays aluminum has not met these expectations. Thus, composite materials, particularly metal matrix composites, have taken aluminum’s place due to the enhancement of mechanical properties of aluminum alloys by reinforcements. This paper deals with the overview of the reinforcements such as SiC, Al₂O₃ and graphene. Graphene has recently attracted many researcher due to its superior elastic modulus, high fatigue strength and low density. It is foreseen and predicted that graphene will replace and outperform carbon nanotubes (CNT) in near future.

Źródło:

Archives of Foundry Engineering; 2018, 18, 2; 5-10
1897-3310
2299-2944

Pojawia się w:

Archives of Foundry Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Investigation of SiC Particle Size Variation on the Tribological Properties of Cu-6Sn-SiC Composite

Autorzy:

Shankar, K. V.
Chandroth, A. M.
Ghosh, K. J. A.
Sudhin, C. B.
Pai, A. S.
Biju, A.
Sriram, K. R.

Powiązania:

https://bibliotekanauki.pl/articles/1840832.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

CuSn
SiC
metal matrix composite
wear
tribological properties

Opis:

Copper have always been an important material and incorporation of elements into copper for property enhancement. Bronze is a relevant cuprous alloy which is important for many industrial and automotive applications like bearings and machineries. The present research is directed towards the fabrication and tribological analysis of regular bronze (Cu-6Sn) and metal matrix composites reinforced with varying particle sized SiC ceramic reinforcement (30, 35 and 40 μm). The developed specimens were subjected to wear analysis according to ASTM standards, to identify the tribological properties utilizing a pin on disk tribometer. It was noted that the wear rates of developed MMC’s phenomenally decremented with an increase in size of SiC particle reinforcement. Also, the test parameters were influential in altering the wear rates to notable margins. The standard scanning electron microscopy techniques aided in identifying the influence of adhesive wear on the specimen surface.

Źródło:

Archives of Foundry Engineering; 2020, 20, 4; 133-138
1897-3310
2299-2944

Pojawia się w:

Archives of Foundry Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Copper-Carbon Nanoforms Composites - Processing, Microstructure and Thermal Properties

Autorzy:

Pietrzak, K.
Gładki, A.
Frydman, K.
Wójcik-Grzybek, D.
Strojny-Nędza, A.
Wejrzanowski, T.

Powiązania:

https://bibliotekanauki.pl/articles/350995.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

metal matrix composite
sintering
copper
graphene
thermal diffusivity

Opis:

The main current of publication is focused around the issues and problems associated with the formation of composite materials with Cu matrix and reinforcing phases in the various carbon nanoforms. The core of the research has been focused on thermal conductivity of these composites types. This parameter globally reflects the state of the structure, quality of raw materials and the technology used during the formation of composite materials. Vanishingly low affinity of copper for carbon, multilayered forms of graphene, the existence of critical values of graphene volume in the composite are not conducive to the classic procedures of composites designing. As a result, the expected, significant increase in thermal conductivity of composites is not greater than for pure copper matrix. Present paper especially includes: (i) data of obtaining procedure of copper/graphene mixtures, (ii) data of sintering process, (iii) the results of structure investigations and of thermal properties. Structural analysis revealed the homogenous distribution of graphene in copper matrix, the thermal analysis indicate the existence of carbon phase critical concentration, where improvement of thermal diffusivity to pure copper can occur.

Źródło:

Archives of Metallurgy and Materials; 2017, 62, 2B; 1307-1310
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Optimization of drilling parameters for aluminum metal matrix composite using entropy-weighted TOPSIS under MQL conditions

Autorzy:

Ghalme, Sachin G.
Karolczak, Paweł

Powiązania:

https://bibliotekanauki.pl/articles/38910718.pdf

Data publikacji:

2023

Wydawca:

Instytut Podstawowych Problemów Techniki PAN

Tematy:

Al metal matrix composite
drilling; parameter optimization
entropy weight
grey relational analysis

Opis:

The aim of the present work is to understand the effect of drilling parameters (drill speed and feed rate) during the drilling of a Saffil fiber-reinforced Al metal matrix composite (MMC) under minimum quantity lubrication (MQL) condition. The effect of drilling parameters on individual response characteristics is evaluated and the optimum drilling parameters are also investigated using a multi-response optimization technique known as the entropy-weighted technique for order performance by similarity to ideal solution (EWTOPSIS). The drilling parameter optimization is performed with the aim of minimizing surface roughness in the drilled hole, roundness error in the drilled hole and feed force during drilling. The drilling parameters have a significant effect on individual responses. Weights were assigned to each response using the entropy weight method, and closeness coefficients were calculated to obtain the optimal level for the drilling parameters. A drill speed of 11 m/min and a feed rate of 0.05 mm/rev are the optimal combination to minimize the desired output responses simultaneously.

Źródło:

Engineering Transactions; 2023, 71, 4; 595-616
0867-888X

Pojawia się w:

Engineering Transactions

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Production of Melt-Spun Al-20Si-5Fe Alloy and Boron Carbide (B4C) Composite Material

Autorzy:

Kilicaslan, M. F.
Uzun, A.
Karakose, E.

Powiązania:

https://bibliotekanauki.pl/articles/353146.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

metal matrix composite
rapid solidification
Al-Si alloys

Opis:

In this study, metal matrix composite materials containing melt-spun Al-20Si-5Fe alloys and boron carbide was produced by high energy ball milling and then hot pressing at 200 MPa pressure and 450°C. Mechanical and microstructural characterizations were performed by using an optical microscopy, X-Ray diffractometer, and dynamic microhardness tester. It was observed that boron carbide particles were homogenously distributed in the microstructure and values of microhardness and elastic modules were averagely 830 MPa and 42 GPa, respectively.

Źródło:

Archives of Metallurgy and Materials; 2018, 63, 2; 597-600
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Structural Properties and Mechanical Behavior of the 2 Step-Reinforced Al-Si/SiCp Metal Matrix Composite by Titanium-Fiber

Autorzy:

Oak, J.-J.
Lee, Y. C.
Park, Y. H.

Powiązania:

https://bibliotekanauki.pl/articles/356010.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

metal matrix composite
sintering
Ti fiber
mechanical properties
diffusion

Opis:

In this study, the newly designed Al-9Si/SiC particles (SiC_p) + Ti-fiber (2step-reinforced Al-9Si alloy matrix) metal matrix composites (MMCs) were fabricated by hot-pressing sintering at 560°C. 2step-reinforced Al-based MMCs were characterized by thermal shrinkage, phase transition, microstructure and tensile strength. The addition of Ti-fiber reduced thermal shrinkage was caused by temperature difference in sintering process as well as enhanced assistance for tensile strength and plastic deformation at room temperature. Experimental results reveal that the 2step-reinforcment sintering by ceramic and metal has a significant effect to increase interface bonding in boundary of each component material and the improved mechanical properties were due to the influence of interfacial product by diffusion. Tensile strength and elongation at room temperature by 2step-reinforcement were improved in 19.5% and 26.2% more than those of Al-9Si/SiC_p, respectively. Especially, it reveals that diffusion direction may be varied by sintering methods at low temperature in this study.

Źródło:

Archives of Metallurgy and Materials; 2017, 62, 2B; 1089-1097
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Processing of Porous NiTi Preforms for NiTi/Mg Composites

Autorzy:

Kucharczyk, A.
Naplocha, K.
Tomanik, M.

Powiązania:

https://bibliotekanauki.pl/articles/352563.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

metal matrix composite
magnesium
nitinol
SHS
squeeze casting

Opis:

NiTi alloys are successfully used in engineering and medical applications because of their properties, such as shape memory effect, superelasticity or mechanical strength. A composite with Mg matrix, due to its vibration damping properties, can be characterized by low weight and good vibration damping properties. In this study, a combination of two techniques was used for successful fabrication of Mg composite reinforced by NiTi alloy preform. The porous preforms synthesized by Self-propagating Hightemperature Synthesis (SHS) from elemental powders were subsequently infiltrated with Mg by squeeze casting. The effects were examined with scanning electron microscope with EDS detector, X-ray diffraction and microindentation. The inspection has shown well-connected matrix and reinforcement; no reaction at the interface and open porosities fully infiltrated by liquid Mg. Moreover, analysis of samples’ fracture has exhibited that crack propagates inside the Mg matrix and there is no detachment of reinforcement.

Źródło:

Archives of Metallurgy and Materials; 2019, 64, 2; 747-752
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Characteristics Bronze/$Al_2O_3(Ni)$ Reinforcement Metal Matrix Composite Produced by Current Activated Sintering

Autorzy:

Uysal, M.
Karslioğlu, R.
Akbulut, H.
Alp, A.

Powiązania:

https://bibliotekanauki.pl/articles/1399704.pdf

Data publikacji:

2013-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.05.Ni
81.20.Ev
81.40.Pq

Opis:

In this study, a bronze matrix (90 wt% Cu + 10 wt% Sn) was reinforced with $Al_2O_3$ particles using mechanical alloying and then produced by a subsequent rapid current sintering technique. The mechanically ball milled bronze powders were reinforced with electroless Ni coated 20 vol.% $Al_2O_3$ particles with three different particle sizes of 90, 70, and 50 μm. Microhardness testing, and scanning electron microscopy were used for the structural characterization of the composites. The tribological behavior of the resultant composites was tested by the ball-on-disk method at 1.0 N applied load with 0.3 m/s sliding speed for determination the wear loss and friction coefficient features against a counterface steel ball.

Źródło:

Acta Physica Polonica A; 2013, 123, 2; 235-237
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Application of FMEA in the Quality Estimation of Metal Matrix Composite Castings Produced by Squeeze Infiltration

Autorzy:

Gawdzińska, K.
Chybowski, L.
Przetakiewicz, W.
Laskowski, R.

Powiązania:

https://bibliotekanauki.pl/articles/353212.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

quality
casting
metal matrix composites
MMC
failure modes and effects analysis
FMEA
material defects
failures

Opis:

Metal matrix composites (MMCs) are still scarcely described due to various combinations of used materials and a wide array of technologies. Applying the Failure Mode and Effect Analysis (FMEA) method to describe the quality of metal composite castings may contribute to eliminating specific (characteristic only to these materials) defects. This part of the analysis determines the criticality numbers, meaning the frequency of a given failure, detectability level and significance of a given failure to the group of specific composite casting failures. It contributes to establishing the priority number (P), which is a measure used to assess risk, a notion essential in discussing quality in a composite casting.

Źródło:

Archives of Metallurgy and Materials; 2017, 62, 4; 2171-2182
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Kompozyty wielkocząsteczkowe w węzłach tarcia maszyn
Polymer composites in friction pair machine

Autorzy:

Janecki, J. T.
Drabik, J.
Pawelec, Z.
Wolszczak, M.

Powiązania:

https://bibliotekanauki.pl/articles/189742.pdf

Data publikacji:

2013

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

epoksydowy kompozyt metalopolimerowy
termoutwardzalny kompozyt metalopolimerowy
zużycie
tarcie
smar plastyczny
metal-polymer composite epoxy
thermosetting metal-polymer composite
wear friction
grease

Opis:

W pracy przedstawiono przegląd wyników prac badawczych zrealizowanych z zakresu opracowywania zoptymalizowanych wersji kompozytów metalożywicznych chemo- i termoutwardzalnych przeznaczonych do budowy i regeneracji węzłów tarcia maszyn i urządzeń.
In the article, the investigation results of the formation chemo- and thermo-setting composite on sliding bearings were presented. Composites of different chemical compositions were investigated. The influence of grease on the tribological characteristic phenol-formaldehyde composites are discussed. The results of the tribological processes that were conducted under different conditions of load and velocity are presented. After the experiments, an analysis of the influence of friction parameters and grease content in the composite on wear characteristics and temperature changes are determined.

Źródło:

Tribologia; 2013, 2; 81-94
0208-7774

Pojawia się w:

Tribologia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Characterisation of Microstructure of We43 Magnesium Matrix Composites Reinforced with Carbon Fibres

Autorzy:

Gryc, A.
Rzychoń, T.

Powiązania:

https://bibliotekanauki.pl/articles/352456.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

metal matrix composite
magnesium
WE43
carbon fibre
heat treatment

Opis:

In the paper the microstructures of WE43 matrix composites reinforced with carbon fibres have been characterised. The influence of reinforcement type and T6 heat treatment (a solution treatment at 525°C for 8 h, a hot water quench and a subsequent ageing treatment at 250°C for 16 h) on microstructure have been evaluated. The light microscope and scanning electron microscope investigations have been carried out. No significant differences in samples reinforced with non-coated textiles have been reported. The substantial changes in sample reinforced with nickel-coated textile have been observed. The segregation of alloying elements to the matrix-reinforcement layer has been identified. The T6 heat treatment caused the appearance of disperse precipitates of β phase, but the process cannot be considered as satisfactory (irregular distribution, low volume fraction, relatively large size).

Źródło:

Archives of Metallurgy and Materials; 2016, 61, 2B; 1075-1081
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 45.

Tytuł:

Surface Integrity Evaluation on Aluminium-Epoxy Composite in Machining using Taguchi Method

Autorzy:

Leong, Kean Wei
Shayful, Zamree Abd Rahim
Fathullah, M.
Omar, Mohd Firdaus
Mohd Mustafa Al Bakri, Abdullah
Radhwan, Husin
Mazlan, Amirul Haziq
Jeż, Bartłomiej
Nabiałek, Marcin

Powiązania:

https://bibliotekanauki.pl/articles/2048837.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

hybrid mold
metal epoxy composite
MEC
machining
injection molding process

Opis:

The increasing needs of using aluminum epoxy composite as a replacement to solid metal rapid prototyping has opened to interests in optimizing its machining processes. This paper reported on the success of optimizing the surface roughness of aluminium epoxy composite using milling process along with a new finding on the best combination parameters. Taguchi method was used as the optimization method whereas spindle speed, feed rate, and depth of cut were set as input factors using an L9 Orthogonal Array. Analysis of Variance was used to identify the significant factors influencing the surface roughness. Experiment was conducted in dry condition using a vertical milling machine and the surface roughness after the machining was evaluated. Optimum combination of cutting parameters was identified after the finest surface roughness (response) based on the signal-to-noise ratio calculated. Cutting parameters selected after preliminary testing are cutting speeds of (2000, 3000 and 4000) rpm, feed rate (300, 400 and 500) mm/min, and cutting depth (0.15, 0.20, and 0.25) mm. The result showed that cutting speed had the largest percentage contribution to surface roughness with 69% and the second highest contribution was feed rate with 22% and depth of cut at 9%. The spindle speed was found as the most significant factor influencing the quality of surface roughness. The result is significant particularly in providing important guidelines for industries in selecting the right combination of parameters as well as to be cautious with the most significant factor affecting the milling process of metal epoxy composite.

Źródło:

Archives of Metallurgy and Materials; 2022, 67, 1; 233-239
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Effect of Boron and Tungsten Carbides on the Properties of TiC-Reinforced Tool Steel Matrix Composite Produced by Powder Metallurgy

Autorzy:

Slokar Benić, Ljerka
Šubić, Jadranko
Erman, Žiga

Powiązania:

https://bibliotekanauki.pl/articles/355244.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

metal matrix composite
steel/TiC composite
powder metallurgy
properties
microstructure

Opis:

The influence of boron carbide and tungsten carbide on the apparent porosity, density, coercive force, hardness and micro-structure of metal matrix composite of the Ferro-TiC type, is presented in this paper. The samples of investigated steel/titanium carbide composite were produced by powder metallurgy process, i.e. by powders mixing and compacting followed by sintering in the vacuum furnace. According to the results, steel/titanium carbide composite materials with addition up to 11.9 vol.% of boron carbide are interesting to detailed investigation as well as materials having more than 17.2 vol.% of tungsten carbide because these compositions show significant changes in hardness and coercive force values.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 2; 539-547
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 47.

Tytuł:

Advances in hybridised and inorganic composite metal halide perovskites : a review

Autorzy:

Farfan, Hariana I.
Roa, Karol L.
Castro, Hugo F.

Powiązania:

https://bibliotekanauki.pl/articles/27315695.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich

Tematy:

perovskites
halides
hybrid
inorganic
composites

Opis:

In recent years, metal halide perovskites have gained significant attention due to their unique optical and electronic properties of semiconductor materials, which make them ideal for use in sustainable and energy-efficient devices. These devices include solar cells, lasers, and light-emitting diodes. Therefore, this review aims initially to provide an overview of the most important characteristics of metal halide perovskites, including their engineering development in various types, such as those based on lead or lead-free materials, like tin or germanium. Additionally, perovskites made from purely inorganic compounds like caesium bromide, chloride, or iodide, as well as hybrids mixed with organic compounds like formamidinium and methylammonium halides will be discussed. The goal is to improve their stability and efficiency. Secondly, some of the studies have proposed technologies combining electronic and mechanical characteristics of flexibility or rigidity as required, promoting their synthesis with different materials such as polymers (poly methyl methacrylate, polyvinylidene fluoride), biopolymers (starch, cyclodextrin, polylactic acid, and polylysines), among others. Finally, the subject of this work is to establish the main purpose of the research carried out so far, which is to develop simpler and more scalable processes at industrial level to achieve greater efficiency and duration in storage, exposure to visible light, critical environments, humid or high temperatures.

Źródło:

Opto-Electronics Review; 2023, 31, 4; art. no. e148221
1230-3402

Pojawia się w:

Opto-Electronics Review

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 48.

Tytuł:

Tribological Properties and Microstructure of the Metal-Polymer Composite thin Layer Deposited on a Copper Plate by Electrocontact Sintering

Autorzy:

Kovtun, V.
Pasovets, V.
Pieczonka, T.

Powiązania:

https://bibliotekanauki.pl/articles/354700.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

metal-polymer sintered composites
electrocontact sintering
thermal state
dry lubricant
tribological properties

Opis:

The properties of the electrocontact sintered metal-polymer composite materials are strongly determined by the heat flow taking place during sintering, which, in turn, is influenced by the amount and initial distribution of the polymer particles in the metal matrix. In case of the metal-polymer powder mixture in the form of a thin layer deposited on the bulk metal substrate, the influence of the latter is also taken into consideration. Thus, the model simulating the heating and sintering of the thin layer made of metal-polymer powder mixture on a metal plate is proposed. Based on mathematical calculations relating to the model describing the thermal state of the system, it is shown how heat flow fields are formed within the layer, depending on the polymer content and its distribution. These theoretical simulations seem to be useful in optimising the production of the antifriction metal-polymer layer on a bulk copper substrate by electrocontact sintering. The results of the tribological experiments and microstructural observations are in a good agreement with the theoretical model.

Źródło:

Archives of Metallurgy and Materials; 2017, 62, 1; 51-58
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 49.

Tytuł:

Model zużycia tribologicznego odlewanych kompozytów stop aluminium-cząstki ceramiczne pracujących w warunkach tarcia technicznie suchego
Composites materials reinforced ceramic particles wear model during dry sliding condition

Autorzy:

Wieczorek, J.

Powiązania:

https://bibliotekanauki.pl/articles/190045.pdf

Data publikacji:

2010

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

kompozyty metalowe
współczynnik tarcia
zużycie
metal matrix composite
friction coefficient
wear

Opis:

Kompozyty na osnowie stopów aluminium wzmacniane cząstkami ceramicznymi SiC znajdują zastosowanie w budowie węzłów tarcia wykorzystywanych w przemyśle maszynowym, lotniczym oraz samochodowym. Rozmieszczenie cząstek zbrojących w osnowie, ich udział objętościowy, kształt oraz wielkość determinują strukturę, a zatem i właściwości materiału. W artykule przedstawiono możliwości kształtowania rozmieszczenia cząstek w odlewie poprzez zastosowanie odlewania ciśnieniowego. Badaniami objęto kompozyty na osnowie stopu AK12 zbrojonego cząstkami SiC o wielkości 10 žm, 25 žm, 50 žm oraz ich mieszaniną. Właściwości tribologiczne, w skojarzeniu żeliwo-kompozyt, badano w warunkach tarcia technicznie suchego, wykorzystując tester T-01. Na podstawie przeprowadzonych badań mikroskopowych i profilografometrycznych powierzchni kompozytów AK12-SiC po współpracy opisano zależność pomiędzy wielkością cząstek zbrojących a geometrią warstwy wierzchniej kompozytu. Przeprowadzone badania pozwoliły na opracowanie modelu zużycia tribologicznego kompozytu w zależności od wielkości cząstek zbrojących.
Aluminium based metal matrix composites are well known for their good wear and erosion resistance, high specific strength, stiffness and hardness. They have found applications within the aerospace, military but especially in the automotive industries. The distribution of particles, their size and shape, and volume fraction together with production method determine the structure and properties of the composite. Trials of pressure die casting of AK12-15%SiC were carried out using a cold-chamber pressure machine of pressure force 100 t, in PRESS company, Poland. The article presents the results of the research on composites MMC's reinforced SiC particles after mating in technically dry sliding conditions. Matrix alloy composites AK12 reinforced with SiC particles (10, 25, 50 |im) were tested after collaboration with cast iron. The friction coefficient value and wear resistance in investigated MMCs depend on particle size used as a reinforcement. The friction coefficient and wear value decrease with the reduction of particles diameter.

Źródło:

Tribologia; 2010, 6; 177-185
0208-7774

Pojawia się w:

Tribologia

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 50.

Tytuł:

Definiowanie obciążeń niszczących z uwzględnieniem możliwości metod kontroli jakości
Definition of ultimate load including capability of quality control methods

Autorzy:

Czarnocki, P.
Tomasiewicz, J.
Szwedo, M.
Chalimoniuk, M.

Powiązania:

https://bibliotekanauki.pl/articles/278455.pdf

Data publikacji:

2014

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Inżynierii Materiałów Polimerowych i Barwników

Tematy:

statek powietrzny
zdatność do lotu
obciążenie niszczące
kontrola jakości
połączenie metal-kompozyt
połączenie bezadhezyjne
aircraft
airworthiness
ultimate load
quality control
metal-composite joint
non-adhesive joint

Opis:

Zaproponowano niekonwencjonalną procedurę definiowania obciążenia niszczącego w odniesieniu do bezadhezyjnego połączenia metal-kompozyt, możliwą do zaakceptowania w procesie dowodowym zdolności do lotu statku powietrznego. Proponowany sposób postępowania bazuje na możliwościach rutynowych metod kontroli jakości i uwzględnia ich ograniczenia. Pokazano także powiązania istniejące między możliwościami diagnostycznymi wykorzystywanych metod, a wartością obciążenia niszczącego.
Non-conventional procedure for defining limit load of non-adhesive metal-composite joint was proposed. This procedure could be used to show compliance of the joint with the airworthiness requirements. The procedure is based on the routine quality control methods and accounts for their limitations. Also, connections between the capacity of quality control methods and value of limit load were indicated.

Źródło:

Przetwórstwo Tworzyw; 2014, [R.] 20, nr 6 (162), 6 (162); 495-498
1429-0472

Pojawia się w:

Przetwórstwo Tworzyw

Dostawca treści:

Biblioteka Nauki

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