Abstract

It is established that the W2B5-MeIV,VC join in the W-B-C-MeIV,V quaternary systems is quasibinary, while polythermal joins are described by eutectic phase diagrams. It is shown that the eutectic composition and temperature correlate with the melting points of carbides and the Me d C content varies from 50 mol % in the W2B5-VC system to 4–6 mol % in the W2B5-TaC system. The existence of Me d C-Me d B2-W2B5 ternary eutectic systems promising for the development of new ceramics is proved.

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