Abstract
The effects of the addition of carbides such as VC, Cr3C2, NbC, TaC and WC on the strength of TiC-Mo2C base cermets were studied at room temperature, considering the kind of binder phase, i.e., Ni and Co. Volume percents of Mo2C, added carbide and binder phase were 13.9, 10.0, and 13.4 respectively.
It was found that the Co-bonded cermets showed generally higher σo and hardness than the Ni-bonded cermets, and the highest values of σo and hardness were obtained in the case where WC (or TaC) was added to the former cermets; here σo is the intrinsic strength of the alloy having no microstructural defects. However, the transverse-rupture strength of Co-bonded cermet with WC (or TaC) was found to be smaller than that of the commonly used Ni-bonded cermet having no additional carbide. The reason was discussed in some detail.
