Phase Equilibria in the Ternary TiBC System

A. I. Gusev

Institute of Solid-State Chemistry, Ural Division, Russian Academy of Sciences,
ul. Pervomaiskaya 91, Yekaterinburg, 620219 Russia

Received April 22, 1996

Abstract—The phase diagram of the ternary Ti–B–C system in the temperature range 300–3500 K is calculated
and constructed. The atomic vacancy ordering of nonstoichiometric titanium carbide TiC_y at temperatures
below 1000 K is taken into account. The phase equilibria in the pseudobinary polythermal TiC_y–TiB₂ and
B₄C_y–TiB₂ cross sections involving nonstoichiometric titanium and boron carbides are described in detail. The
dependences of temperature and the eutectic composition of these cross sections on carbon content in nonsto-
ichiometric carbides are established.

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