Computation and analysis of thermodynamics of self-propagating high-temperature synthesis TiC-Ni cermets

The curves of standard reaction free enthalpies and temperature, adiabatic temperature and Ni content, adiabatic temperature and preheating temperature have been drawn by thermodynamic programming calculation based on thermodynamic principle. The results show that the main reaction of Ti-C-Ni systems is Ti + C = TiC. Adiabatic temperature of the system decreases with the increase of Ni content and the optimal Ni content is about 40% for preheating temperature of 600 K. Adiabatic temperature increases with increasing preheating temperature and properly increasing preheating temperature can ensure the reaction self-sustaining when Ni content is excessive and adiabatic temperature is under 1800 K.