Thermodynamic Aspects of Interaction between Refractory Compounds and Metal Melts

Abstract

Based on the thermodynamic assessment of equilibria in “refractory compound–metal melt” systems, the interaction in the B₄C–Al (Ni, Ni-Si, Ni-Mo) systems is predicted within the Van-Laar theory at temperatures to 1800 K. It is established that interphase-active elements (nickel, titanium, vanadium, and chromium), being in the solid solution state, do not show sufficient chemical activity and do not form new chemical compounds in interaction with refractory compounds (carbides, borides, and nitrides of IV–V group metals) unlike “refractory compound–liquid metal (Ni, Cr, Ti)” systems.