| 2 | Effects of TiB2 Content on the Microstructures and Mechanical Properties of Low-Cobalt Ti(C,N)-TiB2 Cermets Fabricated by Vacuum Hot Pressing显示文摘Ti(C,N)-TiB2 cermets were fabricated from Ti(C,N), TiB2, Co and WC powder mixtures via a vacuum hot pressing process. The influence of TiB2 content on their microstructures and mechanical properties was investigated. As a result of the elevated TiB2 contents, two types of corerim microstructures were present in the Ti(C,N)-TiB2 cermets, and remarkably improved mechanical properties were achieved. With the increase of TiB2 content, the flexural strength, fracture toughness and hardness of the Ti(C,N)-TiB2 cermets first increased, and then decreased, while their relative density consistently decreased. Attributed to an integration of the intergranular and intrangranular fracture behaviors, the Ti(C,N)-TiB2 cermets with 20 wt% TiB2 content exhibited the best overall properties with the relative density, hardness, fracture toughness and flexural strength at 99.3%, 1 995 HV, 7.92 MPa·m1/2 and 1 114 MPa, respectively. The underlying mechanism for their enhanced properties was studied in detail. | 方一航 ZHANG Mengxian ZHAO Xianrui FENG Shangshen PENG Wenyi CHEN Nan 杜国平 | 2019 | Journal of Wuhan University of Technology(Materials Science)2019，34，5： | 0 |
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