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In this paper,Ti(C,N)-based nano cermets were prepared by nano particles,and the effect of VC addition on the microstructure and proper-ties of Ti(C,N)-based nano cermets was investigated.The results showed that there existed black-core grayish-rim structure as well as gray-core grayish-rim structure in VC-doped Ti(C,N)-based nano cermets.With the increase of VC addition,the number of gray cores in-creased,the lattice parameter of Ti(C,N) phase increased,the grain size decreased,the hardness and fracture toughness of Ti(C,N)-based nano cermets were enhanced,and nearly full densification could be achieved.However,excessive addition of VC to 1 wt% resulted in slight decrease in hardness and fracture toughness.Some deep dimples were found in the fracture surface of cermets with VC addition,which cor-responded to ductile fracture.
In this paper, Ti (C, N) -based nano cermets were prepared by nano particles, and the effect of VC addition on the microstructure and proper-ties of Ti (C, N) -based nano cermets was investigated. that there existed black-core grayish-rim structure as well as gray-core grayish-rim structure in VC-doped Ti (C, N) -based nano cermets. With the increase of VC addition, the number of gray cores in-creased , the lattice parameter of Ti (C, N) phase increased, the grain size decreased, the hardness and fracture toughness of Ti (C, N) -based nano cermets were enhanced, and nearly full densification could be achieved. of VC to 1 wt% resulted in slight decrease in hardness and fracture toughness. Severe dimples were found in the fracture surface of cermets with VC addition, which cor-responded to ductile fracture.