中国物理B ›› 2021, Vol. 30 ›› Issue (8): 80205-080205.doi: 10.1088/1674-1056/abfbd6

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Atomistic simulations of the lubricative mechanism of a nano-alkane lubricating film between two layers of Cu-Zn alloy

Jing Li(李京)1,2, Peng Zhu(朱鹏)1,2, Yuan-Yuan Sheng(盛圆圆)1,2, Lin Liu(刘麟)1,2,†, and Yong Luo(罗勇)3   

  1. 1 School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164, China;
    2 Jiangsu Key Laboratory of Green Process Equipment, Changzhou University, Changzhou 213164, China;
    3 School of Materials Science and Physics, University of Mining and Technology, Xuzhou 221116, China
  • 收稿日期:2021-01-19 修回日期:2021-04-16 接受日期:2021-04-27 出版日期:2021-07-16 发布日期:2021-07-20
  • 通讯作者: Lin Liu E-mail:liulin@cczu.edu.cn
  • 基金资助:
    Project supported by the Natural Science Foundation of Jiangsu Higher Education Institutions (Grant No. 17KJA460002) and the "Six Talent Peaks" of Jiangsu Province, China (Grant No. GDZB-002).

Atomistic simulations of the lubricative mechanism of a nano-alkane lubricating film between two layers of Cu-Zn alloy

Jing Li(李京)1,2, Peng Zhu(朱鹏)1,2, Yuan-Yuan Sheng(盛圆圆)1,2, Lin Liu(刘麟)1,2,†, and Yong Luo(罗勇)3   

  1. 1 School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164, China;
    2 Jiangsu Key Laboratory of Green Process Equipment, Changzhou University, Changzhou 213164, China;
    3 School of Materials Science and Physics, University of Mining and Technology, Xuzhou 221116, China
  • Received:2021-01-19 Revised:2021-04-16 Accepted:2021-04-27 Online:2021-07-16 Published:2021-07-20
  • Contact: Lin Liu E-mail:liulin@cczu.edu.cn
  • Supported by:
    Project supported by the Natural Science Foundation of Jiangsu Higher Education Institutions (Grant No. 17KJA460002) and the "Six Talent Peaks" of Jiangsu Province, China (Grant No. GDZB-002).

摘要: We describe simulations of lubrication by a hexadecane molecular lubricating film during the shearing process of a Cu-Zn alloy performed using the atomistic method. The results indicate that with increasing Zn contents, the interface slip between the alloy wall and the lubricating film first decreases and then increases, according to variations of the radius distribution function (RDF), while the interface slip reaches its lowest value of 0.12 during the shearing of CuZn30 alloy. We also discuss the relationship between interface roughness and the lubricating film. During film lubrication, the interface's roughness effectively inhibits interfacial slip. For the convex contact model, the presence of the hexadecane lubricating film reduces the interfacial contact pressure from 11.9 GPa to 8.7 GPa and the friction coefficient from 0.81 to 0.52.

关键词: molecular dynamic simulation, nanotribology, Cu-Zn alloy, interface slip

Abstract: We describe simulations of lubrication by a hexadecane molecular lubricating film during the shearing process of a Cu-Zn alloy performed using the atomistic method. The results indicate that with increasing Zn contents, the interface slip between the alloy wall and the lubricating film first decreases and then increases, according to variations of the radius distribution function (RDF), while the interface slip reaches its lowest value of 0.12 during the shearing of CuZn30 alloy. We also discuss the relationship between interface roughness and the lubricating film. During film lubrication, the interface's roughness effectively inhibits interfacial slip. For the convex contact model, the presence of the hexadecane lubricating film reduces the interfacial contact pressure from 11.9 GPa to 8.7 GPa and the friction coefficient from 0.81 to 0.52.

Key words: molecular dynamic simulation, nanotribology, Cu-Zn alloy, interface slip

中图分类号:  (Molecular dynamics and particle methods)

  • 02.70.Ns
68.35.Af (Atomic scale friction) 68.35.-p (Solid surfaces and solid-solid interfaces: structure and energetics) 73.43.Cd (Theory and modeling)