Lubrication mechanisms of graphene for DLC films scratched by a diamond tip

被引：38

作者：

Bai, Lichun ^{[1
,2
]}

Srikanth, Narasimalu ^{[1
]}

Zhao, Bo ^{[2
]}

Liu, Bo ^{[2
]}

Liu, Zishun ^{[3
]}

Zhou, Kun ^{[2
]}

机构：

[1] Nanyang Technol Univ, Interdisciplinary Grad Sch, 50 Nanyang Ave, Singapore 639798, Singapore

[2] Nanyang Technol Univ, Sch Mech & Aerosp Engn, 50 Nanyang Ave, Singapore 639798, Singapore

[3] Xi An Jiao Tong Univ, State Key Lab Strength & Vibrat Mech Struct, Int Ctr Appl Mech, 28 Xianning West Rd, Xian 710049, Peoples R China

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2016年 / 49卷 / 48期

关键词：

lubrication; graphene; diamond-like carbon; molecular dynamics simulation; MOLECULAR-DYNAMICS SIMULATIONS; SLIDING STEEL SURFACES; HIGH-VACUUM CONDITION; AMORPHOUS-CARBON; TRIBOLOGICAL BEHAVIOR; NANOSCALE FRICTION; SPACE APPLICATIONS; LAYER GRAPHENE; COATINGS; WEAR;

D O I：

10.1088/0022-3727/49/48/485302

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The lubrication behavior of graphene for diamond-like carbon (DLC) films scratched by a diamond tip is investigated by molecular dynamics (MD) simulations. Graphene can efficiently lubricate the DLC film, and its lubrication performance can be improved by the increase of its layer number but be degraded by its defects and large size. The friction mechanisms of graphene during its lubrication highly depend on normal force, F-N. Under a small F-N, a superlow friction force, F-f, is obtained which represents the super-lubrication of graphene. Under a large F-N, the F-f increases due to the tribochemical reactions of graphene. Such reactions happen before the rupture of the graphene, which indicates the limitations of the super-lubrication of graphene in realistic situations.

引用

页数：11

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