中国物理B ›› 2023, Vol. 32 ›› Issue (4): 46801-046801.doi: 10.1088/1674-1056/ac8ea0

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Study of metal-ceramic WC/Cu nano-wear behavior and strengthening mechanism

Min Zheng(郑敏)1, Jie Chen(陈杰)1, Zong-Xiao Zhu(朱宗孝)1,†, Ding-Feng Qu(曲定峰)1, Wei-Hua Chen(陈卫华)1, Zhuo Wu(吴卓)1, Lin-Jun Wang(王林军)1, and Xue-Zhong Ma(马学忠)2   

  1. 1 School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
    2 School of Petroleum and Chemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
  • 收稿日期:2022-05-24 修回日期:2022-08-24 接受日期:2022-09-02 出版日期:2023-03-10 发布日期:2023-04-04
  • 通讯作者: Zong-Xiao Zhu E-mail:zhuzongxiaolut@163.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 52005236) and the Natural Science Foundation of Gansu Province, China (Grant No. 20JR5RA442).

Study of metal-ceramic WC/Cu nano-wear behavior and strengthening mechanism

Min Zheng(郑敏)1, Jie Chen(陈杰)1, Zong-Xiao Zhu(朱宗孝)1,†, Ding-Feng Qu(曲定峰)1, Wei-Hua Chen(陈卫华)1, Zhuo Wu(吴卓)1, Lin-Jun Wang(王林军)1, and Xue-Zhong Ma(马学忠)2   

  1. 1 School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
    2 School of Petroleum and Chemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
  • Received:2022-05-24 Revised:2022-08-24 Accepted:2022-09-02 Online:2023-03-10 Published:2023-04-04
  • Contact: Zong-Xiao Zhu E-mail:zhuzongxiaolut@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 52005236) and the Natural Science Foundation of Gansu Province, China (Grant No. 20JR5RA442).

摘要: In view of the inherent poor tribological properties of copper, the reinforcement of copper matrix composites with WC particles presents a promising research area with significant industrial influence. Therefore, in the present study, a molecular dynamics approach is used to simulate the process of repeated friction of diamond grinding balls on WC/Cu composites, and the friction force, friction coefficient, abrasion depth, wear rate, abrasion morphology, von-Mises stress, internal defects, workpiece energy, and performance comparison of different layer thicknesses are systematically investigated in the multiple friction process. It is found that the fluctuation amplitude of friction force, friction coefficient, and abrasion depth are smaller and the fluctuation frequency is larger during the initial friction, whereas near the WC phase, there appears extreme values of the above parameters and the von-Mises stress is highly concentrated while the workpiece energy contonues to increase. In the case of the repeated friction, with the increase of friction times, the friction force, friction coefficient, and abrasion depth fluctuation amplitude increase, the fluctuation frequency decreases, the workpiece energy reaches an extreme value near the WC phase, and a large number of dislocations plug, therefore, the region is strengthened. As the distance between the grinding ball and the WC phase decreases, the more obvious the strengthening effect, the stronger the ability of workpiece to resist the wear will be.

关键词: molecular dynamics, repetitive friction, copper matrix composites, reinforcement

Abstract: In view of the inherent poor tribological properties of copper, the reinforcement of copper matrix composites with WC particles presents a promising research area with significant industrial influence. Therefore, in the present study, a molecular dynamics approach is used to simulate the process of repeated friction of diamond grinding balls on WC/Cu composites, and the friction force, friction coefficient, abrasion depth, wear rate, abrasion morphology, von-Mises stress, internal defects, workpiece energy, and performance comparison of different layer thicknesses are systematically investigated in the multiple friction process. It is found that the fluctuation amplitude of friction force, friction coefficient, and abrasion depth are smaller and the fluctuation frequency is larger during the initial friction, whereas near the WC phase, there appears extreme values of the above parameters and the von-Mises stress is highly concentrated while the workpiece energy contonues to increase. In the case of the repeated friction, with the increase of friction times, the friction force, friction coefficient, and abrasion depth fluctuation amplitude increase, the fluctuation frequency decreases, the workpiece energy reaches an extreme value near the WC phase, and a large number of dislocations plug, therefore, the region is strengthened. As the distance between the grinding ball and the WC phase decreases, the more obvious the strengthening effect, the stronger the ability of workpiece to resist the wear will be.

Key words: molecular dynamics, repetitive friction, copper matrix composites, reinforcement

中图分类号:  (Metals and alloys)

  • 68.35.bd
31.15.at (Molecule transport characteristics; molecular dynamics; electronic structure of polymers) 46.55.+d (Tribology and mechanical contacts) 81.05.Mh (Cermets, ceramic and refractory composites)