Zobrazeno 1 - 10
of 91
pro vyhledávání: '"O N Grigor'ev"'
Publikováno v:
Journal of Superhard Materials. 38:327-336
Coatings of the ZrB2–MoSi2 system on graphite (≤ 50 μm thick and 14–15 GPa in hardness) have been produced by pulse laser melting in air of two-layer powder coating with sublayers based on ZrB2 with additions of ZrSi2 and SiC. Different coatin
Autor:
A. M. Bloshchanevich, D. V. Yurechko, O. N. Grigor'ev, M. A. Vasil’kovskaya, Irina A. Podchernyaeva
Publikováno v:
Powder Metallurgy and Metal Ceramics. 54:679-685
A high-temperature ZrB2–MoSi2 coating on graphite is produced by pulsed laser melting (in air) of a graphite sample with powder layers pre-deposited on the working surface. It is demonstrated that laser melting is accompanied by an intensive phase
Autor:
O. N. Grigor'ev
Publikováno v:
Powder Metallurgy and Metal Ceramics. 51:697-708
The papers presents results of studies focusing on the development and characterization of ultrahigh-temperature structural ceramics, ceramics with high wear resistance and impact penetration resistance, and cermets and coatings based on nonoxide ref
Publikováno v:
Powder Metallurgy and Metal Ceramics. 51:584-588
The paper studies the mechanism of interaction between ZrB2–ZrSi2–SiC composites and dross-type oxide melts formed during the combustion of low-reactive carbons containing oxide rocks up to 30–40 vol.%. It is established that silicon carbide fr
Publikováno v:
Powder Metallurgy and Metal Ceramics. 51:49-55
Structural basaltic materials are analyzed to establish the relationship of their structure to strength and fracture resistance. It is shown that their strength is determined by the size of initial crack-like defects, and fracture resistance by the a
Publikováno v:
Powder Metallurgy and Metal Ceramics. 50:632-640
The properties of laminated ceramic systems, especially those with low-strength bonds, are discussed. It is shown that residual stresses, which depend on the physical and mechanical characteristics (such as strength, thermal expansion coefficient, th
Publikováno v:
Powder Metallurgy and Metal Ceramics. 50:212-216
The interaction of titanium, zirconium, and tungsten borides with chromium is studied. It is shown that the process is induced by contact melting involving intensive wetting of borides with interaction products at temperatures much lower than the mel
Autor:
O. D. Shcherbina, I. L. Berezhinskii, N. D. Bega, É. V. Prilutskii, V. A. Kotenko, T. V. Dubovik, V. I. Subbotin, A. A. Rogozinskaya, L. M. Udovenko, O. N. Grigor'ev, V. V. Lychko
Publikováno v:
Powder Metallurgy and Metal Ceramics. 50:194-201
The phase constitution and properties of BNC composites (with SiC and SiO2 (quartz glass) additives) are studied as functions of hot pressing temperature. The developed BNC composites have higher mechanical strength and oxidation resistance than hot-
Production and properties of impact-resistant composites based on boron carbide and aluminum nitride
Autor:
T. V. Mosina, V. V. Lychko, O. D. Shcherbina, N. D. Bega, O. N. Grigor'ev, T. V. Dubovik, V. I. Subbotin, V. A. Kotenko, I. L. Berezhinskii
Publikováno v:
Powder Metallurgy and Metal Ceramics. 49:193-200
The dependence of the phase constitution and strength of B4C–AlN composites on the initial charge formulation and hot pressing temperature is studied. It is established that new reinforcing phases are synthesized during reaction sintering under pre
Publikováno v:
Powder Metallurgy and Metal Ceramics. 49:66-70
A complex oxide film forms when (AlN–TiN)–(Ni–Cr)–(TiN–Cr3C2) composite ceramics are exposed to concentrated solar radiation. The film has good adhesion to the base and contains oxide phases which show chemical affinity to one another and f