Abstract
For the purpose of a study of sinfluences of Mo-addition on the structures and properties of TiC base cermet for cutting tool, sintering process of TiC-10% M-10% Mo specimen was investigated. During sintering under the condition of solid state sintering, Mo converts into Mo2C at the range of about 800-1000°C. The Mo2C diffuses in TiC and a new phase is formed on sorroundings of TiC particles. The new phase is intermediate in hardness of TiC and Ni phase, but it has the same crystal structure as TiC. This phase is, therefore, regarded as a solid solution of TiC and Mo2C. Development of this phase depends upon sintering condition, especially upon temperature and is remarkable for sintering above 1400°C. Sintered compact with such solid solution phase, however, is not desirable for cutting tool materials, because it is poor in wear-and chipping- resistance.
