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Wyświetlanie 1-15 z 145
Tytuł:
Electrolyte coatings of chromium with nanodiamonds on sintered steels
Autorzy:
Gidikova, N.
Valov, R.
Petkov, V.
Salamci, E.
Bilgili, Z.
Unal, R.
Powiązania:
https://bibliotekanauki.pl/articles/391723.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
Tematy:
sintered products
chromium coating
wear resistance
corrosion resistance
Opis:
Sintered ferrous components were coated with electrochemical chromium coatings modified with nanodiamond particles. The nanodiamond particles were produced by detonation synthesis with an average grain size 8 nm. The objective of this study was to determine the tribological properties and the corrosion resistance of sintered iron samples coated with an electrochemically deposited chromium layer modified with nanodiamond particles. The thickness of the obtained composite coatings was more than 25 μm. The microstructure and microhardness were determined by metallographic methods. The mechanical and chemical properties of the samples were compared to uncoated samples prepared from the same iron powder. The microhardness was 5 times higher, the wear resistance increased 6 times and the corrosion resistance in 0.1 M NaCl solution was 10 times higher.
Źródło:
Prace Instytutu Odlewnictwa; 2017, 57, 4; 333-336
1899-2439
Pojawia się w:
Prace Instytutu Odlewnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physico-mechanical properties of Ti-containing chromium-free conversion coatings on zinc coated steel
Autorzy:
Winiarski, J.
Szczygieł, B.
Powiązania:
https://bibliotekanauki.pl/articles/115610.pdf
Data publikacji:
2011
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
zinc coating
corrosion resistance
conversion coating
adhesion
wear resistance
Opis:
This work aims at physico-mechanical properties of the Ti-containing chromium-free conversion coatings on zinc coated steel. The wear resistance of the whole conversion coating/zinc coating system depends on the deposition time of these coatings. As the duration of the deposition of conversion coatings containing titanium increases, the wear resistance of the samples decreases. The reason for this deterioration in wear resistance is likely worse adhesion of these coatings obtained at longer deposition times. The best adhesion to the zinc substrate posses coatings deposited for 20 s.
Źródło:
Challenges of Modern Technology; 2011, 2, 4; 27-30
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrid nanocomposite layers Ni/Al2O3/C graphite produced by electrocrystallization method
Autorzy:
Bartoszek, W.
Trzaska, M.
Powiązania:
https://bibliotekanauki.pl/articles/354819.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hybrid composite layers
electrocrystallization
nickel layers
wear resistance
corrosion resistance
Opis:
The paper presents the results of studies of hybrid composite layers Ni/Al2O3/Cgraphite produced by the electrodeposition method. Three variants of hybrid composite layers were prepared in electrolyte solutions with the same amounts of each dispersion phases which were equal to 0.25; 0.50 and 0.75 g/dm3. The structure of Ni/Al2O3/Cgraphite layers as well as the Al2O3 and graphite powders, which were used as dispersion phases was investigated. The results of morphology and surface topography of produced layers are presented. The modulus of elasticity and microhardness of the material of produced layers were determined by DSI method. Tribological and corrosion resistance tests of produced layers were carried out. Realized studies have shown that the material of the produced layers is characterized by a nanocrystalline structure. Incorporation of dispersion phases into the nickiel matrix increases the degree of surface development of layers. Ni/Al2O3/Cgraphite layers are characterized by high hardness and abrasion resistance by friction, furthermore, they provide good corrosion protection for the substrate material.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 1; 167-173
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The analysis of the influence of UHMWPE modification on the wear resistance
Autorzy:
Sedlacek, R.
Vondrova, J.
Powiązania:
https://bibliotekanauki.pl/articles/285018.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
UHMWPE
wear resistance
Źródło:
Engineering of Biomaterials; 2007, 10, no. 63-64; 2-4
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the properties of Co-TiC and Ni-TiC HiP-sintered alloys
Autorzy:
Cherepova, Tetiana
Dmitrieva, Galyna
Tisov, Oleksandr
Dukhota, Oleksandr
Kindrachuk, Myroslav
Powiązania:
https://bibliotekanauki.pl/articles/970620.pdf
Data publikacji:
2019
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
cobalt
nickel
titanium carbide
sintered alloys
heat resistance
wear resistance
melting temperature
Opis:
Three types of sintered alloys were fabricated based on cobalt, nickel and high-temperature alloy ZhS32-VI matrix with titanium carbide strengthening phase. TiC content was in a range of 30–50 vol. %. The melting temperatures of alloys are higher than 1320°C, and they may undergo undamaged through all technological procedures together with turbine blades, including soldering and outgassing. DSC analyses indicates no additional thermal effects until melting, which confirms their structural stability. The examinations of microstructure revealed three types of constituents – TiC particles, matrix solid solution and blow outs – structural defects having negative effects on all the studied properties. It was found that heat resistance of nickel based sintered alloys at the temperature of 1100°C is superior as compared with the alloys based on cobalt and alloy ZhS32-VI. It has been established that wear resistance in conditions of fretting wear at temperatures of 20, 850, 950 and 1050°C of sintered alloy with ZhS32-VI matrix is mostly superior as compared with the other alloys. The properties of produced alloys allow to use them for manufacturing of components of friction couples operating in conditions of high temperature fretting wear, including protective pads of turbine blades top shrouds contact faces.
Źródło:
Acta Mechanica et Automatica; 2019, 13, 1; 57-67
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the Erosive Wear Resistance of Boronized Ash-Blowing Nozzles
Autorzy:
Calik, A.
Ozbakir, O.
Karakas, S.
Ucar, N.
Powiązania:
https://bibliotekanauki.pl/articles/1030338.pdf
Data publikacji:
2017-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
boriding
wear resistance
boride layer
hardness
Opis:
In this study, pack boronizing was applied to ash-blowing nozzles manufactured from AISI 1040 steels using Ekabor II powders as the boronizing source at a temperature of 1273 K for a duration of 8 h. Erosive wear tests of boride ash-blowing nozzles were carried out in ash delivery line of thermal reactor under actual working conditions. It was observed that erosive wear resistance of borided ash-blowing nozzles were increased 3 times as a result of the boronizing process. The improved wear resistance of the borided samples can be explained by increased surface hardness and higher work hardening.
Źródło:
Acta Physica Polonica A; 2017, 131, 2; 252-254
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure of friction products and the surface of tribological system elements
Autorzy:
Brzózka, K.
Żurowski, W.
Górka, B.
Powiązania:
https://bibliotekanauki.pl/articles/147924.pdf
Data publikacji:
2013
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
abrasive wear
Mössbauer spectroscopy
wear resistance
Opis:
The goal of the paper is to identify characteristic features of the surfaces of rubbing bodies and friction products, which come into being when friction processes are realized under optimal conditions, regarding wear resistance. Mössbauer investigations carried out both in scattering and transmission arrangement have evidenced, between others, differences in oxides content and their phase composition, depending on the temperature of tribological system in the course of friction test. It has been found that the wear products obtained at the optimal temperature are composed of the much smaller particles than those produced at lower or at higher temperature.
Źródło:
Nukleonika; 2013, 58, 1; 99-103
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vlijanie parametrov vibracionnojj obrabotki na iznosostojjkost gazoplamennykh antifrikcionnykh pokrytijj
Influence of parameters of the vibratory the durability of gasoflame anti-friction coatings
Autorzy:
Luzan, S.
Kirienko, N.
Powiązania:
https://bibliotekanauki.pl/articles/77389.pdf
Data publikacji:
2015
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
vibration
vibrostimulation
industrial environment
machine exploitation
wear resistance
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 7
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of pulsed plasma accelerators for surface modification
Autorzy:
Tereshin, V.
Chebotarev, V.
Garkusha, I.
Bovda, A.
Powiązania:
https://bibliotekanauki.pl/articles/147534.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
modification
plasma stream
plasma treatment
surface
wear resistance
Opis:
A pulsed coaxial plasma accelerator was utilized in the experiments discussed in this paper. Plasma streams with ion energy up to 2 keV, plasma density 2-3×1014 cm-3, and plasma energy density 5-40 J/cm-2, were generated. Such a plasma was used for the surface modification of different constructional steels. Experimental results on improvement of physical properties of metal surfaces (first of all tribological characteristics), under their irradiation by pulsed plasma streams are presented. Optimization of the treatment process was carried out varying plasma energy flux, plasma density, and energy of ions. It was shown that microhardness of the steel samples, both non-quenched and previously quenched, was increased by several times after plasma irradiation. The main attention was paid to the analysis of wear resistance of the treated material by using different methods of wear tests. The possibility to achieve a sufficient decrease of the wear rate of the treated samples was demonstrated.
Źródło:
Nukleonika; 2001, 46, 1; 27-30
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure of the superficial region and mechanical properties of nitrided cast steels
Autorzy:
Górka, B.
Budzynowski, T. W.
Brzózka, K.
Powiązania:
https://bibliotekanauki.pl/articles/147910.pdf
Data publikacji:
2013
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
cast steel
microhardness
Mössbauer spectroscopy
nitriding
wear resistance
Opis:
A series of cast steels were subjected to two-stage low-temperature nitriding. Mossbauer, XRD and mechanical investigations were carried out for both as-cast and nitriding materials in order to determine phase composition (especially the content of gamma'-Fe4N and epsilon-Fe2-3N), microhardness of the superficial region as well as tribological properties. It has been stated that the relative content of iron-nitrogen phases strongly depends on chemical composition of the cast steel and the effective thickness of the surface layer comprising iron nitrides is less than 0.015 mm. Considerable increase of surface microhardness and wear resistance of nitrided specimens in comparison with their as-cast counterparts has been observed. It has been found that the values of microhardness of nitrided samples at the surface are above twice larger than those in the core.
Źródło:
Nukleonika; 2013, 58, 1; 117-121
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Alloying Elements on Properties and Structure of High Chromium Cast Irons
Autorzy:
Kaňa, V.
Záděra, A.
Krutiš, V.
Powiązania:
https://bibliotekanauki.pl/articles/351222.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
high chromium cast irons
wear resistance
carbides
refinement
Opis:
The paper deals with hypereutectic high chromium cast irons. The subject of examination was the effect of various alloying elements (Ti, W, Mo, V) on the size of primary carbides and on the resultant material hardness. Using a scanning electron microscope with a wave dispersion analyser, the carbon content in carbides was established. To determine the other elements, an energy dispersion analyser was used. It was found that both the primary and the eutectic carbides were of the M7C3 type and very similar in composition. The carbides always contained Cr and Fe, and also W, Mo, V or Ti, in dependence on the alloying elements used. The structure of materials containing only chromium without any alloying additions exhibited coarse acicular primary carbides. The structure of materials alloyed with another element was always finer. Marked refinement was obtained by Ti alloying.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 2; 609-614
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Properties of the Aluminium Alloy EN AC-51100 after Laser Surface Treatment
Autorzy:
Tański, T.
Pakieła, W.
Janicki, D.
Tomiczek, B.
Król, M.
Powiązania:
https://bibliotekanauki.pl/articles/353290.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
laser treatment
aluminium alloy
silicon carbide
wear resistance
Opis:
In this paper, the influence of a laser surface treatment on the structure and properties of aluminium alloy has been determined. The aim of this work was to improve the tribological properties of the surface layer of the EN AC-51100 aluminium alloy by simultaneously melting and feeding silicon carbide particles into the molten pool. The silicon carbide powder was introduced into the liquid metal using a gravity feeder within a constant feed rate of 1 g/min. A high power diode laser (HPDL) was used for remelting. Laser beam energies used in experiments were 1.8 kW, 2.0 kW and 2.2 kW, combined with the constant velocity of 50 mm/min. As a result of the laser treatment on the aluminium alloy, a composite layer with greater hardness and wear resistance compared to the based material was obtained.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 1; 199-204
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of gas on the tribological properties of steel 16MnCr5 after surfacing with micro-jet cooling
Autorzy:
Tarasiuk, W.
Piwnik, J.
Hornik, A.
Węgrzyn, T.
Majewski, W.
Powiązania:
https://bibliotekanauki.pl/articles/244978.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
wear resistance
steel 16MnCr5
micro-jet
surfacing
Opis:
This paper presents results of experimental research concerning the impact of an innovative method of micro-jet cooling on the padding weld performed with MAG welding. It enables to steer the parameters of weld cooling in a precise manner. Micro-jet cooling is a novel method patented in 2011. In addition, various elements, which may e.g. enhance hardness or alter tribological properties, can be entered into its top surface, depending on the applied cooling gas. The micro-jet welding method is the innovative method, which reduces the intensity of abrasive wear. The method can be used as a basic finishing or a regeneration method. An innovative technology for micro-jet is used to cool the weld surface that is, using a micro-welding jet cooling. This allows accurate and complete control of the surface structure of the deposit. The material under study was steel 16MnCr5, which was subject to the welding process with different gases of micro-jet cooling. Nitrogen and air was used as a cooling gas. The main parameter of weld assessment was wear intensity. The tests were conducted in a tribological pin-on-disc type position. T-11 pin-on-disc tester allows for indicating basic wear parameters (wear intensity, wear coefficient, wear force). Based on results of experiment the application of nitrogen in micro-jet cooling of the padding weld in the welding process of steel 16MnCr5 beneficially affects resistance to abrasive wear.
Źródło:
Journal of KONES; 2016, 23, 4; 541-548
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical properties of a-C:H/Ti layers on prosthodontic CoCr and NiCr alloys
Autorzy:
Szymański, W.
Batory, D.
Cłapa, M.
Klimek, L.
Powiązania:
https://bibliotekanauki.pl/articles/284500.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
carbon layer
corrosion
wear resistance
dental implant
gradient
methalosis
Opis:
Co-Cr and Ni-Cr alloys are widely used in dental implants production. However, there is a risk connected with application of this kind of materials like allergy and methalosis caused by Cr, Ni ions, very dangerous for patients’ health and life. Moreover metal ions released into human body can affect inflammation of the surrounding tissue. Biomaterials’ surface treatment by the deposition of diamond-like carbon films can noticeably improve the corrosion and mechanical features. Widely discussed in world’s literature problems with adhesion of DLC layers can be solved by the deposition of gradient a-C:H/Ti layer. Due to that, it is possible to manufacture thick and well adherent carbon layer on the implant’s surface which will constitute a very good protection against wear and corrosion. Our goal was to evaluate the mechanical properties of a-C:H/Ti layers deposited on CoCr and NiCr alloys in hybrid deposition system RF PACVD/MSand to find the influence of layer thickness on the selected properties. As the result of the investigation it was noticed that deposition of a-C:H/Ti layer improves the mechanical properties of CoCr and NiCr alloys. High hardness and good adhesion of gradient carbon layers makes them a very perspective material for this kind of applications.
Źródło:
Engineering of Biomaterials; 2009, 12, 85; 2-5
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of the cutting tool geometry on the tool wear resistance when machining Inconel 625
Autorzy:
Zlámal, T.
Hajnyš, J.
Petrů, J.
Mrkvica, I.
Powiązania:
https://bibliotekanauki.pl/articles/103138.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
wear resistance
Inconel 625
cutting tool geometry
entering angle
Opis:
The paper deals with the design of a suitable cutting geometry of a tool for the machining of the Inconel 625 nickel alloy. This alloy is among the hard-to-machine refractory alloys that cause very rapid wear on cutting tools. Therefore, SNMG and RCMT indexable cutting insert were used to machine the alloy. The selected insert geometry should prevent notch wear and extend tool life. The alloy was machined under predetermined cutting conditions. The angle of the main edge and thus the size and nature of the wear changed with the depth of the material layer being cut. The criterion for determining a more suitable cutting geometry was the tool’s durability and the roughness of the machined surface.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 4; 286-293
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 145

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