Conclusions
It is shown that in the system ZrC-ZrB2 there is virtually no intersolubility of the components up to 2100°C, and it is only at a temperature of 2650°C that some dissolution of ZrB2 (<2 wt.%) is observed. Using data yielded by x-ray diffraction and metallographic examinations and measurements of the initial melting temperatures of ZrC-ZrB2 alloys and of the microhardness of their structural components, a constitution diagram has been constructed for the system under investigation. The diagram is of the eutectic type, with Te=2660±40°C and a eutectic composition of 57 ZrB2 and 43 mole% ZrC.
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Literature cited
V. K. Grigorovich, Heat Resistance and Constitution Diagrams [in Russian], Metallurgiya, Moscow (1969).
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Translated from Poroshkovaya Metallurgiya, No. 5 (149), pp. 61–64, May, 1975.
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Ordan'yan, S.S., Unrod, V.I. Reactions in the system ZrC-ZrB2 . Powder Metall Met Ceram 14, 393–395 (1975). https://doi.org/10.1007/BF00807811
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DOI: https://doi.org/10.1007/BF00807811