THERMODYNAMIC MODELING OF PHASE-EQUILIBRIUM IN NI-MO-C SYSTEM

Modern eutectic composites, which are worked out by now, have a very c omplex composition. This is caused by the necessity of increasing the number and concentration of alloying elements and is accompanied by an essential change in concentration anc! temperature parameters of the eutectic transformation, enlarging its temperature interval and decrea ding directional crystallization rates. The composition region of nick el based alloys with the molybdenum carbide, which are the most favour able for directional crystallization, is situated on the tie-line of t hree phase equilibrium, which is passing through the point e(0). Eutec tic alloys gamma+ Mo2C belong to the type of skeleton eutectics and Mo 2C carbide is the phase which leads the crystallization.