Graphene nanocrystallites induced short run-in period with low electric power at current-carrying sliding interface

被引：7

作者：

Sun, Kun ^{[1
]}

Fan, Xue ^{[2
]}

Yang, Lei ^{[3
]}

Chen, Sicheng ^{[3
]}

Fan, Jinwei ^{[1
]}

Diao, Dongfeng ^{[2
]}

机构：

[1] Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Adv Mfg Technol, Beijing 100124, Peoples R China

[2] Shenzhen Univ, Inst Nanosurface Sci & Engn INSE, Shenzhen 518060, Peoples R China

[3] Xi An Jiao Tong Univ, Key Lab Educ Minist Modern Design & Rotor Bearing, Xian 710049, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2021年 / 568卷

基金：

中国国家自然科学基金;

关键词：

Graphene nanocrystallite; Short run-in; Electric power; Low friction; Carbon film; AMORPHOUS-CARBON COATINGS; TRIBOLOGICAL CHARACTERIZATION; FRICTION; FILMS; THIN; SUPERLUBRICITY; LUBRICATION; BEHAVIOR; DENSITY; NM;

D O I：

10.1016/j.apsusc.2021.150902

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：

We reported the current-carrying friction behavior of graphene nanocrystallites carbon (GNC) film, which had hybrid structure with graphene nanocrystallites embedded in amorphous carbon (a-C) matrix. The GNC film exhibited high electrical conductance of 7.7 similar to 30.9 S/cm for effective current transmission, and short run-in period of 10 similar to 25 frictional cycles for achieving low friction (mu = 0.03 similar to 0.05) with low electric power of 0.25 similar to 0.60 W under the electric current of 0.5 A. As a comparison, a-C film showed low electrical conductance of 3.2 S/cm and long run-in period of 50 frictional cycles with high electric power of 1.25 W. The high electrical conductance and the short run-in period effectively reduce the electrical and mechanical energy consumption for the GNC film, thus presenting wider promising practical applications. Based on the nanostructure characterization, the role of graphene nanocrystallites was summarized as the electron transport channels for transmitting the electric current and the source of graphene nanocrystallite structure for promoting the low friction interface formation. These findings present potentials of the GNC film in protecting the current-carrying friction interface.

引用

页数：9