Effect of Particle Size and Vacuum Sintering Temperature on Phase Composition and Mechanical Properties of WC-12 wt% Co Hardmetals
The experimental results indicated that the WC-12wt% Co specimens showed excellent mechanical properties and microstructure by the optimal sintering process.The G5 specimen sintered at 1400℃/1 h achieved a relative density of 98% and a hardness of HRA 88.5.Meanwhile,the TRS increased to 2400 MPa.F 12 specimens that sintered at 1350℃/1 h achieved a relative density of 99% and a hardness of HRA 92.5.The TRS was also enhanced to 2170 MPa.In this study,the η phase (Co3W3C) precipitated at a high sintering temperature.The precipitations generated by liquid phase sintering gathered in some specific regions of the specimens and reacted with the WC particles.In addition,Co3W3C was a hard and brittle phase that resulted in a low TRS for the specimens; and a large amount ofη phases were detrimental to the fracture toughness of the specimens.
WC-12wt Co Sintering Hardness TRS and η phase
Shih-Hsien Chang Chung-Wei Lee Kuo-Tsung Huang Ming-Wei Wu
Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Department of Auto-Mechanics, National Siluo Agricultural Industrial High School, Yunlin County 6484 Department of Materials Science and Engineering, National Formosa University, Huwei, Yunlin,63201, T
国际会议
广州
英文
3-7
2012-11-16（万方平台首次上网日期，不代表论文的发表时间）