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排序方式: 共有114条查询结果,搜索用时 15 毫秒
1.
Grigoriev O.N. Panasyuk A.D. Brodnikovskyy M.P. Podchernyaeva I.O. Melakh L.M. Yurechko D.V. Vedel D.V. Kozak I.V. 《Powder Metallurgy and Metal Ceramics》2022,60(9-10):626-634
Powder Metallurgy and Metal Ceramics - Hot pressing was used to produce compact ceramic samples with the following composition (wt.%): 60 ZrB2 + 20 SiC + 20 (Al2O3 + 32 t-ZrO2). The tetragonal... 相似文献
2.
I. A. Podchernyaeva A. D. Panasyuk M. A. Teplenko O. N. Grigor’ev T. V. Mosina R. K. Ivashchenko 《Powder Metallurgy and Metal Ceramics》2004,43(11-12):598-605
The mass transfer kinetics, composition, structure, and properties of coatings, formed by high-frequency electric-spark alloying of 45 and 40X steels with the Ti - Al (3:1, 1:1, 1:3) intermetallics and TiN - AIN (1:1) nitride were studied as a function of the current pulse frequency(ν = 1200 and 1600 Hz). A decrease in ν was found to lead to a higher mass transfer coefficient and higher microhardness and Young’s modulus of the coating as well. This is due to the decrease in the Ti/Al ratio on the surface. The phase composition of intermetallic and nitride coatings differed only insignificantly and did not depend on the value of ν. The main phases of the coatings were Fe - Ti - O and Al - Ti - O solid solutions. The nitride and intermetallic coatings had similar friction coefficients f and wear rates I (f = 0.26 and 0.28, I = 5.4 and 5.9 µm/km), despite the difference in their structure. We can assume that the coating phase composition which defines the composition of the secondary structure under dry friction, is the main factor controlling tribological behavior. 相似文献
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Teplenko Marina A. Podchernyaeva Irina A. Panasyuk Alla D. 《Powder Metallurgy and Metal Ceramics》2002,41(3-4):154-161
We have studied the process of electrospark alloying of titanium alloy VT6 and steels with a composite material based on AlN ZrB2 with ZrSi2 additive. We have established that Al2SiO5 and ZrSiO4 forming in the coating directly during its formation play the role of a solid lubricant. Under optimal conditions for electrospark alloying of the titanium alloy, the coefficient of friction is 0.13, the wear is 6 m/km for a sliding velocity of 14 m/sec and a load of 2.56 MPa. Ceramics based on AlN ZrB2 can be recommended for use as wear-resistant and corrosion-resistant coatings. 相似文献
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Podchernyaeva Irina A. Lavrenko Vladimir A. 《Powder Metallurgy and Metal Ceramics》2001,40(1-2):44-48
The formation of a surface layer on low-alloyed steel during light-thermal treatment with a composite material based on Si3N4 Al2O3 was investigated. The working surfaces were studied using metallographic, x-ray diffraction, and electron-probe microanalysis. It was found that the corrosion-resistant phases Al2SiO5, (Fe, Cr)2O3, (Cr, Al) 2O3, and NiCrO4 formed in the alloyed layer, increasing its microhardness by 2-5 times and its corrosion resistance in sea water by more than two orders of magnitude. 相似文献
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A. P. Umanskii V. P. Konoval A. D. Panasyuk I. A. Podchernyaeva V. V. Malyshkin V. A. Kralya 《Powder Metallurgy and Metal Ceramics》2007,46(3-4):133-138
The coatings of the (TiCrC)-(FeCr) composite are deposited on steel and titanium alloy by plasma method. The composition,
structure, and tribotechnical properties of these coatings are studied in comparison with traditional materials based on the
Ni-Cr alloy. The effect of preliminary surface treatment methods, i.e., sandblasting treatment and electrospark alloying,
on coating properties is examined. The fretting corrosion of coatings is investigated. It is established that coatings based
on double titanium-chromium carbide have considerably greater wear resistance than that of Ni-Cr alloys at almost equal friction
coefficients. It is established that electrospark alloying is competitive with traditional sandblasting treatment in environmental
effect and coating-to-based adhesion.
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Translated from Poroshkovaya Metallurgiya, Vol. 46, No. 3–4 (454), pp. 37–45, 2007. 相似文献
10.
Podchernyaeva Irina A. Panasyuk Alla D. 《Powder Metallurgy and Metal Ceramics》2000,39(11-12):554-559
Studies have been done on how various concentrated energy forms (spark discharge and laser beam) affect the formation, composition, and structure of coatings made from the new composite material TiB2 ― AlN (1:1). The working surfaces have been examined by x-ray phase analysis, microprobe, and metallography. It is found that the composition and structure of a spark coating differ from those of the depositing electrode. The TiB2 ― AlN material is recommended for hardening low-carbon steels. 相似文献