New Carbides in the Ni-Ti-Mo-C System

Abstract

Two new carbide phases, M1-phase and M2-phase, were found in the Ni-Ti-Mo-C quaternary system at 1273 K. M1-phase with the composition (Ti_0.46Mo_0.54)C is hexagonal with a=0.60313 run, c= 1.02371 nm. M2-phase with the composition (Ti_0.28Mo_0.72)C is orthorhombic with a=0.51610 nm, b=1.58280 nm, c=0.29810 nm. The Ni content in the both compounds was less than 0.1 at %. Phase relationships among such phases as [γ+C+δ+M1], [γ+C+M1+M2], [γ+C+M2+α-MoC_1-x], [γ+δ+ M1+M2], [γ+δ+M2+α-MoC_1-x] were also established.