RESEARCH ON TiC-Ni CERMETS BY SHS AND PSEUDO HEAT ISOSTATIC PRESSING

Dense TiC-Ni cermes TN20 were prepared by self-propagating high-temperature systhesis and pseudo heat isostatic pressing. It mainly consisted of TiC particles and Ni-binder. TiC skeletal structure was enveloped by uncontinuous Ni-binder phase. The interfacial bonding between TiC and Ni was found to be of a good quality. High dislocation density existed near the interface and inside the Ni-binder phase. Meanwhile properties of TN20 prepared under two pressures were studied. It is found that strength of TN20 getting under high pressure is close to K138A produced by traditional technology.