PHASE-EQUILIBRIA IN CO-ME'C-ME''C ALLOYS .2. SYSTEMS WITH 4-PHASE EUTECTIC EQUILIBRIUM

State diagrams of Co-Me'-Me ''-C (Me:Ti, Zr, Hf, V, Nb, Ta) systems ar e platted on the basis of experimental mental data for the Co-ZrC0.81- VC0.83, Co-HfC0.94-VC0.83, Co-TiC0.8-ZrC0.81, Co-TiC0.8-HfC0.94, HfC0. 94, Co-VC0.88-NbC0.82 CO-VC0.83-TaC0.82, and Co-ZrC0.81-TaC0.82 sectio ns. Each of the three-dimensional diagrams of all the sections has thr ee binary eutectics and a single ternary eutectic. The systems have no ternary compounds.