Friction evolution with transition from commensurate to incommensurate contacts between graphene layers

被引：55

作者：

Dong, Yun ^{[1
,2
,3
]}

Duan, Zaoqi ^{[1
,2
]}

Tao, Yi ^{[1
,2
]}

Wei, Zhiyong ^{[1
,2
]}

Gueye, Birahima ^{[1
,2
]}

Zhang, Yan ^{[1
,2
]}

Chen, Yunfei ^{[1
,2
]}

机构：

[1] Southeast Univ, Sch Mech Engn, Nanjing 211189, Jiangsu, Peoples R China

[2] Southeast Univ, Jiangsu Key Lab Design & Manufacture Micronano Bi, Nanjing 211189, Jiangsu, Peoples R China

[3] Lanzhou Univ Technol, Sch Mech & Elect Engn, Lanzhou 730050, Gansu, Peoples R China

来源：

TRIBOLOGY INTERNATIONAL | 2019年 / 136卷

基金：

中国国家自然科学基金;

关键词：

Friction evolution; Ultra-low friction; Moire patterns; Graphene layers; SUPERLUBRICITY; DYNAMICS; QUALITY; MODEL;

D O I：

10.1016/j.triboint.2019.03.058

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

By performing molecular dynamics simulations, the interfacial atomic forces of two contacting graphene flakes are calculated to quantitatively illustrate the friction evolution from commensurate to incommensurate contacts. It is found that the atomic force distributions display moire patterns. The moire patterns for the contact stress indicate the contact quality, while the patterns for the shear stress are related to the friction force. In both the commensurate and incommensurate contacts, part of the interface atoms experiences positive friction force while the other atoms negative friction force. However, the interfacial friction distributions for the incommensurate state clearly demonstrate that the positive and negative atomic friction forces distribute more symmetry than that in the commensurate state, which produces an ultra-low effective friction force.

引用

页码：259 / 266

页数：8

共 47 条

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