VC and Cr3C2 doped WCoB-TiC ceramic composites prepared by hot-pressing |
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| Affiliation: | 1. College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, PR China;2. School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, PR China;1. School of Mechanical and Electrical Engineering, Nanchang university, Nanchang 330031, China;2. School of Materials Science, Wuhan University of Technology, Wuhan 430070, China;3. State Key Lab of Advanced Welding and Joining, Harbin Institute of Technology, 150001, China;4. Institute of Applied Physics, Jiangxi Academy of Sciences, Nanchang 330029, China;5. Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan;6. Nishinippon Institute of Technology, Obase, Fukuoka 803-0394, Japan |
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| Abstract: | The grain growth inhibitors (GGIs) VC and Cr3C2 doped WCoB-TiC ceramic composites were fabricated by hot-pressing. The microstructure, hardness, transverse rupture strength (TRS), fracture toughness (KIC) and wear-resistance of WCoB-TiC ceramic composites were investigated. The results reveal that the grains can obviously become refined and the densification temperature of WCoB-TiC ceramic composites will be increased due to the VC and Cr3C2. The typical microstructure of WCoB-TiC ceramic composites mainly consist of bright W2CoB2 grains, gray TiC particles, dark TiB2 and pores. WCoB-TiC ceramic composites doped with 0.3 wt% VC and 0.3 wt% Cr3C2 hot-pressing at 1420 °C show the optimum mechanical properties (hardness, TRS and KIC are 92.6 HRA, 1976 MPa and 14.8 MPa m1/2, respectively) and the best dry sliding wear-resistance. |
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