Molecular dynamics simulation of mechanism of nanoparticle in improving load-carrying capacity of lubricant film

被引：22

作者：

Hu, Chengzhi ^{[1
]}

Bai, Minli ^{[1
]}

Lv, Jizu ^{[1
]}

Li, Xiaojie ^{[2
]}

机构：

[1] Dalian Univ Technol, Sch Energy & Power Engn, Dalian 116024, Peoples R China

[2] Dalian Univ Technol, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China

来源：

COMPUTATIONAL MATERIALS SCIENCE | 2015年 / 109卷

基金：

中国国家自然科学基金;

关键词：

Nanoparticle; Lubricant; Molecular dynamics; Load-carrying capacity; CURVED SOLID-SURFACES; TRIBOLOGICAL PROPERTIES; THERMAL-CONDUCTIVITY; BOUNDARY LUBRICATION; MOS2; NANOTUBES; FRICTION; NANOFLUIDS; BEHAVIOR; OIL; CU;

D O I：

10.1016/j.commatsci.2015.07.028

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The properties of base oil and nano-lubricant film confined between two approaching walls under boundary lubrication were studied using molecular dynamics simulation. The nano-lubricant consists of one Cu nanoparticle and n-octane as base fluid. The load-carrying capacity of nano-lubricant was found to be much higher than that of the base oil. The nanoparticle improved the load-carrying capacity before rupture of the lubricant film. The effect of nanoparticles on lubricant film structures was analyzed to determine mechanisms responsible for these results. Firstly, because of an adsorption layer around the nanoparticle, the nano-lubricant molecules become more organized and compact compared with base oil. Secondly, the soft Cu nanoparticle is deformed by the structural characteristics of the nano-lubricant film, which provides good support for the lubricant film. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：97 / 103

页数：7

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