Superlow friction of amorphous diamond-like carbon films in humid ambient enabled by hexagonal boron nitride nanosheet wrapped carbon nanoparticles

被引：0

作者：

Bai C. ^{[1
,2
]}

An L. ^{[1
,2
]}

Zhang J. ^{[1
]}

Zhang X. ^{[1
]}

Zhang B. ^{[1
]}

Qiang L. ^{[1
,2
]}

Yu Y. ^{[1
,2
]}

Zhang J. ^{[1
]}

机构：

[1] Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou

[2] Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing

来源：

Chemical Engineering Journal | 2021年 / 402卷

基金：

中国国家自然科学基金;

关键词：

Carbon nanoparticles; Diamond-like carbon films; Hexagonal boron nitride nanosheets; Humid ambient; Superlow friction;

D O I：

10.1016/j.cej.2020.126206

中图分类号：

学科分类号：

摘要：

The friction and wear of amorphous diamond-like carbon (DLC) films will dramatically increase with the increment of ambient humidity. This drawback can lead to lubrication failure, which greatly impedes the practical applications of DLC films in humid environment. Herein, a simple method is proposed to improve the tribological performance of DLC films in humid environment by adding hexagonal boron nitride nanosheet wrapped carbon nanoparticles (CNP@h-BNNSs) as lubricants. The reciprocating friction tests demonstrate that DLC films with CNP@h-BNNSs as lubricants possess excellent antifriction and antiwear performance at the relative humidity (RH) of 7.5–55%. Especially, it can achieve a superlow friction and wear at the RH of 45–55% which decrease by respectively 13 and 25 times as compared to those obtained from DLC films without lubricants. The investigation on the steel ball surface after friction test shows that a protective tribo-layer containing carbon, boron and nitrogen elements is formed. The existence of this tribo-layer can effectively reduce the friction and protect the steel ball surface from excessive wear. Noteworthy, the h-BNNSs are exposed at the friction interface acting as lubricating layer while the carbon nanoparticles are adsorbed on steel ball surface playing as binding binder. Furthermore, the ball movement mode of CNP@h-BNNSs and the interaction between water molecules and CNP@h-BNNSs are also considered as key factors to reduce friction. All these results indicate that CNP@h-BNNSs which can be massively produced have the potential to reduce the friction and wear of DLC films in humid environment. © 2020

引用

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