Preparation of TiC/Ni Functionally Gradient Materials by SHS-Pressing

A SHS-Pressing method was developed to form dense TiC/Ni functionally gradient material.The mechanisms of combustion synthesis-densification in Ti-C-Ni systems were studied.It is proposed that carbon is dissolved into Ti-Ni melt;TiC is presipitated from the melt;The dense TiC/Ni FGM is formed by liquid phase sintering under pressure.The grain size of TiC decreases with increasing content of Ni because of reduction of combustion temperature. Grain shape of TiC varies with the content of Ni.The morphology of TiC grains changes from polyhedra to spherical shape by accommodation process when the quantity of Ni melt increases.