Microstructure and Mechanical Properties of Ti(C,N)-based Functional Gradient Cermets Nitriding by Microwave Heating

Abstract

The interaction between nitrogen and titanium carbonitride (Ti(C,N))-based cermets by microwave heating was applied to develop functional gradient cermets. Ti(C,N)-based cermets was densification and nitrided simultaneously above the eutectic temperature, which greatly shortens the sintering time. Experimental results show that a face centered cubic (fcc) rich surface layer was formed at the surface of the cermets. Meanwhile, a new three layers core/rim structure was found in the cermets and its formation mechanism was proposed in this study. The functional gradient material exhibits excellent comprehensive properties.