Formation of the structure and phase composition of titanium nitride-(nickel-molybdenum) materials

The features of structure and phase composition of sintered heterophase mat erials based on TiN with Ni-Mo binder have been studied. Molybdenum in the binder increases the material density in comparison with that of nickel bin der. This seems to be due to less release of nitrogen from TiN. After sinte ring, the binder consists of intermetallics of titanium with nickel and mol ybdenum, as well as solid solution based on nickel and molybdenum. The effe ct of Al2O3 additives (20%) on the microstructure and phase composition of TiN-Ni-Mo was also studied Sintering in argon ambient and in vacuum results in increase of microhardness and lattice parameter of TiN caused by dissol ution of nickel, molybdenum, and oxygen in TiN.