Conclusions
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1.
A graphite-base composite material with zirconium diboride and silicon carbide additions produced by the HP process surpasses a similar material produced by the CP process in density, strength, and thermal shock resistance, but is inferior to it in stability of properties.
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2.
The structure and properties of the HP material depend to a large extent upon the hot-pressing temperature and pressure. Departing by ±100°C from the optimum temperature and by ±50 kg/cm2 from the optimum pressure lowers the strength of the material by 11–40%. The duration of isothermal holding at 2100°C appears to have no effect upon the properties of the HP material.
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Literature cited
US Pat. No. 3065088 (1962); US Pat. No. 3140190 (1960); French Pat. No. 1307940 (1962); French Pat. No. 1351977 (1963); West Ger. Pat. No. 1488469 (1969).
L. A. Gel'fond, A. I. Gusakov, and Yu. N. Petrov, in: Graphite-base Constructional Materials [in Russian], Vol. 7, Metallurgiya, Moscow (1971).
Yu. V. Levinskii, K. I. Portnoi, S. N. Salibekov, et al., in: Reactions of High-temperature Materials with Their Environments, Proceedings of an All-Union Scientific Seminar Organized by the Institute of Materials Science, Academy of Sciences of the Ukrainian SSR (edited by G. V. Samsonov) [in Russian], Naukova Dumka, Kiev (1968), p. 175.
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Translated from Poroshkovaya Metallurgiya, No. 3(159), pp. 79–84, March, 1976.
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Gel'fond, L.A., Dergunova, V.S. & Petrov, Y.N. Some properties and structure of a graphite-base composite material with zirconium diboride and silicon carbide additions. Powder Metall Met Ceram 15, 225–228 (1976). https://doi.org/10.1007/BF00806533
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DOI: https://doi.org/10.1007/BF00806533