Abstract
Ni–Cr–C materials with a high hardness determined by the presence of regions consisting of Cr3C2 microrods with a record microhardness reaching 3200 kg/mm2 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°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.
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Original Russian Text © V.P. Val’chuk, D.S. Zmienko, V.V. Kolesov, L.A. Chernozatonskii, 2018, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2018, Vol. 107, No. 7, pp. 470–473.
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Val’chuk, V.P., Zmienko, D.S., Kolesov, V.V. et al. Formation of Superhard Chromium Carbide Crystal Microrods in Ni–Cr–C Systems. Jetp Lett. 107, 446–449 (2018). https://doi.org/10.1134/S0021364018070111
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DOI: https://doi.org/10.1134/S0021364018070111