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MISCELLANEOUS
Formation of superhard chromium carbide crystal microrods in Ni-Cr-C systems
V. P. Val'chuka, D. S. Zmienkob, V. V. Kolesovc, L. A. Chernozatonskiia a Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia
b State Atomic Energy Corporation ROSATOM, Moscow, Russia
c Kotel'nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow, Russia
Abstract:
Ni-Cr-C materials with a high hardness determined by the presence of regions consisting of Cr$_3$C$_2$ microrods with a record microhardness reaching 3200 kg/mm$^2$ have been obtained. Their self-organization in a powder consisting of Ni, Cr, and carbon microparticles with a high weight percentage occurs in the process of its sintering at a temperature of 1300$^\circ$C and the subsequent sharp cooling of the resulting alloy. A model has been proposed for the process of formation of such crystal microrods whose characteristics have been determined by hardness measurement, electron microscopy, and microchemical and X-ray diffraction analyses.
Received: 01.03.2018
Citation:
V. P. Val'chuk, D. S. Zmienko, V. V. Kolesov, L. A. Chernozatonskii, “Formation of superhard chromium carbide crystal microrods in Ni-Cr-C systems”, Pis'ma v Zh. Èksper. Teoret. Fiz., 107:7 (2018), 470–473; JETP Letters, 107:7 (2018), 446–449
Linking options:
https://www.mathnet.ru/eng/jetpl5544 https://www.mathnet.ru/eng/jetpl/v107/i7/p470
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Abstract page: | 140 | Full-text PDF : | 11 | References: | 20 | First page: | 3 |
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