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| Preparation and research of high-entropy-alloy CoCrFeNiTiAl bonded WC cemented carbide |
| ZHENG Donghai, TANG Yu |
| （School of Mechanical Engineering, Dongguan University of Technology, Dongguan 523808, China） |
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Abstract WC based cemented carbide bonded by high-entropy-alloy CoCrFeNiTiAl was successfully fabricated
by spark plasma sintering. The densification behavior, phase constitution, microstructure and mechanical properties
of WC-CoCrFeNiTiAl composites were studied and compared with WC-Co. After sintering at 1 200 ℃, the WCCoCrFeNiTiAl
specimens show dense microstructures. At room temperature, the hardness of the WC-10%
CoCrFeNiTiAl specimen is 20.06 GPa, which is 18.1% higher than that of theWC-10% Co specimen.At 600/800 ℃,
the WC-CoCrFeNiTiAl specimens exhibit excellent softening resistance, and their hardness is 40.6%~46.5% higher
than that of the WC-Co specimen. The good high temperature softening resistance of WC-CoCrFeNiTiAl cemented
carbide within 800 ℃ is mainly attributable to the diffusion retardation of CoCrFeNiTiAl solid solution.
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Received: 09 May 2022
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Corresponding Authors:
唐愈（1986—），女，硕士，助理实验师，主要研究方向为粉末冶金材料制备。
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2022, Vol. 32 
