2011•Journal of Xiamen University of TechnologyRequires access

Effects of Addition of Nano-BN Particles on Microstructure and Mechanical Properties of Ti(C,N)-based Cermets

GU Si-yong

Abstract

Ti(C,N)-based cermets reinforced by nano-BN particles were prepared by a microwave sintering technology under N2 gas atmosphere.Effect of different content of nano-BN on transverse rupture strength(TRS)and hardness of the cermet was studied.Microstructure of this material was analyzed by SEM with BSE.Result shows the addition of nano-BN particles has obvious strengthening effect on the property of this cermet.The ttransverse rupture strength and hardness of the cermet are improved to about 21.6% and 1.6%,respectively,when the content of nano-BN particles is 1.5% in weight.The addition of nano-BN particles baffles the dissolution of Ti(C,N).The micrograph on fracture surface of this cermet shows a cleavage fracture.

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Key concepts: Cermet, Microstructure, Materials science, Nano-, Sintering, Composite material, Dissolution, Metallurgy