Microstructure and mechanical properties of TiB2/(Ni+Mo) composites fabricated by hot pressing

The fabrication of TiB2 ceramics with high performance at a relatively low temperature requires a second phase to assist the densification and control the microstructure. Moreover the interface characteristics of composites m ust also be considered. Nickel was chosen as a good metallic-bearing additi ve in this study. In order to optimize the interface, Mo was added. The res ults show that Mo can affect the interreaction between TiB2 and Ni, and met allic liquid plays an important role in limiting the TiB2 grain growth in s intering.