Effect of CoCrFeNiW<sub><i>x</i></sub> High Entropy Alloy Binder on Microstructure and Mechanical Properties of WC Cemented Carbide

YU Yifan; TIAN Jun; LIU Tao; CAI Xiaokang; LIU Chao; DAI Pinqiang

doi:10.11973/jxgccl202302003

Materials and Mechanical Engineering > 2023 > 47(2): 14-20,25. > DOI: 10.11973/jxgccl202302003

YU Yifan, TIAN Jun, LIU Tao, CAI Xiaokang, LIU Chao, DAI Pinqiang. Effect of CoCrFeNiW_x High Entropy Alloy Binder on Microstructure and Mechanical Properties of WC Cemented Carbide[J]. Materials and Mechanical Engineering, 2023, 47(2): 14-20,25. DOI: 10.11973/jxgccl202302003

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Effect of CoCrFeNiW_x High Entropy Alloy Binder on Microstructure and Mechanical Properties of WC Cemented Carbide

YU Yifan^1,2,
TIAN Jun^1,2,,
LIU Tao^2,3,
CAI Xiaokang⁴,
LIU Chao⁴,
DAI Pinqiang^1,2

1. College of Materials Science and Engineering, Fujian University of Technology, Fuzhou 350118, China;
2. Fujian Key Laboratory of Advanced Materials Preparation and Forming Technology, Fujian University of Technology, Fuzhou 350118, China;
3. School of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, China;
4. Xiamen Tungsten Industry Co., Ltd., Xiamen 361013, China

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Received Date: November 21, 2021
Revised Date: October 25, 2022

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Abstract

Abstract

CoCrFeNiW_x(x=0.2, 0.5, mole fraction/%) high entropy alloy powder was prepared by mechanical alloying method. The powder was mixed with WC powder as a binder (adding mass fraction was 6%, 10%, 14%, respectively), and then WC cemented carbides were obtained by spark plasma sintering. The effect of the high entropy alloy binder on the microstructure and mechanical properties of the cemented carbide was studied. The results show that the CoCrFeNiW_x high entropy alloy binder had a face-centered cubic and body-centered cubic dual-phase structure and could refine grains in WC cemented carbides. With the increase of high entropy alloy binder content, the Vickers hardness of the WC cemented carbide decreased, and the fracture toughness and bending strength had a general increase trend. The WC cemented carbide prepared by adding 10wt% CoCrFeNiW_0.2 high entropy alloy binder had the best comprehensive performance, with Vickers hardness of 1 785 HV, fracture toughness of 10.6 MPa·m^1/2, and bending strength of 1 373 MPa.
- mechanical alloying,
- high entropy alloy,
- WC cemented carbide,
- spark plasma sintering

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Effect of CoCrFeNiWx High Entropy Alloy Binder on Microstructure and Mechanical Properties of WC Cemented Carbide

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Effect of CoCrFeNiW_x High Entropy Alloy Binder on Microstructure and Mechanical Properties of WC Cemented Carbide