Atomistic insight into the minimum wear depth of Cu(111) surface

作者：Li, Zengqiang; Huang, Yanhua; Zhang, Junjie^*; Yan, Yongda; Sun, Tao

来源：Nanoscale Research Letters, 2013, 8(1): 514.

DOI：10.1186/1556-276X-8-514

• Single asperity friction
• Friction and wear
• Single crystalline Cu
• Incipient plasticity
• Molecular dynamics

In the present work, we investigate the minimum wear depth of single crystalline Cu(111) under single asperity friction by means of molecular dynamics simulations. The atomistic mechanisms governing the incipient plasticity are elucidated by characterizing specific defect structures and are correlated to the observed mechanical and frictional responses of the material. Furthermore, the effect of probe radius on the friction process is studied. Our simulations indicate that the formation of wear impression is closely associated with defect nucleation and the minimum wear depth is equivalent to the critical penetration depth at which plasticity initiates. It is found that the probe radius has a strong influence on the formation of defect structures and the observed mechanical responses.

• 出版日期2013-12-5
• 单位哈尔滨工业大学; 中国工程物理研究院激光聚变研究中心; 中国工程物理研究院