Effect of Mo2C content on the properties of TiC/TiB2 base cermets

The effects of Mo2C content on the microstructure and mechanical properties of TiC/TiB2 base cermets were studied using the model cermets with the compositions of TiC/TiB2-(11?17)Mo2C-24Ni (mass%). TiC and TiB2 ratio is set to molar ratio of 59:41 that is near quasi-eutectic composition. As a result, both transverse rupture strength and hardness of the cermets showed maxima for the cermet containing 13% Mo2C. The cermet achieved remarkable microstructural refinement and still maintained characteristic core-rim structure of the TiC base cermets. TiC/TiB2 cermets, in addition to TiCN base cermets, are a good alternative material to cemented carbides.