Fabrication of Nano-composite Ti(C,N)-based Cermets by Spark Plasma Sintering

OM,SEM,EDX and other techniques were used to analyze the porosity,microstructure and fractography of nano-composite Ti(C,N)-based cermets produced by spark plasma sintering(SPS).The mechanical properties of Ti(C,N)-based cermets produced in different conditions were discussed.At 1250℃ for 8min by elevating directly,fairly good mechanical performance could be obtained.Except the microstructure of black core/white rim,white core/black rim was also presented,which resulted from the existence of nano-powders which changed the evolution of microstructure.The fracture mainly originated from cavities and the intergranular fracture was the leading fracture mode,besides the cleavage fracture and transgranular fracture.