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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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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 ZrO2-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 KIC) 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
Artykuł
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
Artykuł
Wyświetlanie 1-15 z 163

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