A Study On High-temperature Mechanical Properties Of TiC-Ni Cermet

As an alternative material of WC-Co, TiC-Ni cermets is mainly used in machining aero. However the britleness of this material limits its scope of application. So far, there has been only a few study on high temperature mechanical properties especially high-temperature creep properties on TiC-Ni cermets. In this article, the author carried out a large number of high-temperature tensile/creep tests on TiC-Ni materials prepared by SHS-PHIP technology by using the CSS—3905 creep testing machine. Creep models were used to simulate experimental data. Then the minimum creep rates, stress exponents, and activation energy were also calculated. To investigate the relationship between damage and hardness, micro-Vickers hardness tester was used to measure the hardness of TiC-Ni before and after the tensile/creep experiments. Experimental results showed that the changes of hardness during the experiments had no defining characteristics.