Superlubricity of metal -metal interface enabled by graphene and MoWS 4 nanosheets

被引：35

作者：

Jiang, Bangzheng ^{[1
,2
]}

Zhao, Zhicheng ^{[1
,2
]}

Gong, Zhenbin ^{[1
]}

Wang, Dailian ^{[1
]}

Yu, Guoming ^{[1
,2
]}

Zhang, Junyan ^{[1
]}

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China

[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2020年 / 520卷

基金：

中国国家自然科学基金;

关键词：

MACROSCALE SUPERLUBRICITY; FRICTION; MOS2; WEAR; MIXTURES; ADHESION; WS2;

D O I：

10.1016/j.apsusc.2020.146303

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Most mechanical parts are made of metal, but the metallic bond has no directivity and the electrons can move freely, resulting in the strong adhesion and high shear force between friction interfaces. Therefore, the existing superlubricity materials almost fail in the metal-metal friction interface. In this work, superlubricity in steel-steel interface was realized by adding MoWS4 + graphene through a simple spray method. MoWS4/graphene nanosheets composite introduced atomic interface mismatch and stimulated the formation of nanoscroll in dry argon. Raman and HRTEM results showed the wear debris had scroll structure and nanostructured tribofilms were generated on the metal surface. As a result, the metal-metal contact was converted into tribofilm-nanoscroll-tribofilm friction couple, providing an incommensurate sliding interface and leading to robust macroscale superlubricity. © 2020 Elsevier B.V.

引用

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