MECHANICAL PROPERTIES OF TiC-Ni PRODUCED BY SHS AT ROOM AND HIGH TEMPERATURES

In this paper, mechanical properties of TiC-Ni cermets were investigated, which were produced by new technique——self-propagating high-temperature combustion synthesis combined with forced compaction. The results showed that HRA hardness and bending strength reached the maximum values when Ni content was 20 wt%, and a fracture toughness maximum was obtained when Ni content was 30 wt%. At room temperature, the fracture of TiC-Ni cermets is characterized as brittle fracture. At high temperature, bending strength of TiC-Ni cermets decreased with temperature increasing and plastic distortion took place beyond 1000℃. The strength of TiC-Ni cermets is close to that of the materials with similar composition prepared by traditional powder metallurgy process.