The Sinterability of Nitrogen Contained TiC-Mo₂C-Ni Cermet

Abstract

The reason why the sinterability of nitrogen contained cermet became lower with increasing nitrogen content, was studied. The TiC-(0-40)mass%TiN-15mass%Mo₂C-lOmass%Ni cermets sintered in vacuum were used as specimens. It was found that TiN particles were denitrified and carburized during rising temperature to sintering temperature and subsequently during sintering under liquid phase. Therefore, the reason was considered to be in the fact that the amount of liquid phase at a fixed sintering temperature decreased as the mixed powder behaved like low carbon alloy, and on the other hand, micropores due to nitrogen gas generation formed during sintering.