Effect of Si C Whisker Addition on Microstructure and Properties of Ti(C0.7,N0.3)-based Metalloceramics 在线阅读 下载PDF
Author of the article:CHEN Geng;FANG Qin;ZHANG Guangming;WANG Zhengyun;SUN Wenwen;HE Yuebin;LIN Hongbin
Author's Workplace：Sichuan Laboratory of Aerial Material Testing and Die Forging Technology,Sichuan Engineering Technical College,Deyang 618000,China;School of Materials Science and Engineering,Xihua University,Chengdu 610039,China
Key Words：whisker Ti(C0.7,N0.3)-based metalceramics strength and toughness
Abstract：
The Ti(C0.7,N0.3)-based cermet composite was fabricated by powder metallurgy.The effect of Si C whisker addition on the microstructure and properties of Ti(C0.7,N0.3)-based metalceramics was studied by using XRD,SEM,hardness tester and universal testing machine.The results show that the Ti(C0.7,N0.3)-based metalceramics has an obvious and complete'core-rim'structure,compared with the matrix structure without whiskers,a'white core-gray rim'structure added with whiskers appeared in the cermet structure,and the crystal grains are more refined.As the whisker content increased,the hardness of the cermet decreased,while the transverse rupture strength and fracture toughness showed a trend of rising first and then decreasing.When the addition amount of whiskers is 1.5%,the strength and toughness of the cermet has a largest improvement while the hardness has a slight drop.The transverse rupture strength and fracture toughness are respectively 1 620 MPa and 12.2 MPa·m1/2,which were 13.3%and 16.1%higher than those without whisker,respectively.
