Understanding the friction behavior of sulfur-terminated diamond-like carbon films under high vacuum by first-principles calculations

作者：Zhang, Renhui^*; Zhao, Juan; Yang, Yingchang; Shi, Wei; Lu, Zhibin; Wang, Junjun^*

来源：Current Applied Physics, 2018, 18(3): 317-323.

DOI：10.1016/j.cap.2018.01.006

• Friction
• Diamond-like carbon
• Vacuum
• First-principles

Generally, the repulsive force was a key factor account for superlow friction of H or F doped diamond-like carbon (DLC) films under high vacuum. As we known, H or F doped DLC usually exhibited superlow friction under high vacuum. However, the superlow friction of S doped DLC under high vacuum was not found so far. This phenomenon was desirable to be well investigated. In this work, S-terminated diamond interfaces also exhibited strong repulsive force, however, the estimated friction coefficient was variable for S-terminated diamond interfaces. The lowest and largest friction coefficient was about 0.003 and 0.4 respectively, which indicated that the superlow friction of S doped DLC could achieve in theory. In order to well probe the unusual friction behavior of S doped DLC under high vacuum, using first-principles method, the repulsive interaction between sliding surfaces was well investigated in order to understand the unusual friction behavior of S doped DLC films.

• 出版日期2018-3
• 单位重庆理工大学; 中国科学院兰州化学物理研究所; 铜仁学院