Abstract
Ti(CN) based cermets have a core/shell microstructure, which gives rise to outstanding mechanical properties and chemical stability for cutting tool applications. The HfC content and C/N ratio in Ti(C1-x Nx ) were varied in order to investigate the effect of HfC addition on the microstructure of Ti(C1-x Nx )–Ni systems. The presence of HfC in the solid solution, (Ti,Hf)C, was found to cause the surface energy to be more anisotropic in the presence of liquid Ni. A phase separation of (Ti,Hf)C and (Hf,Ti)C was noted when >20 wt-%HfC was added to TiC–HfC–Ni. In addition, the Ti(C0·3 N0·7 ) based system showed the lowest coarsening for all sintering times of the various Ti(C1-x Nx ) systems examined. This study focuses on the role of various Ti(CN) and HfC cermets and how they affect the coarsening of microstructures.
Get full access to this article
View all access options for this article.