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论文类型：期刊论文

发表时间：2015-11-01

发表刊物：COMPUTATIONAL MATERIALS SCIENCE

收录刊物：SCIE、EI、Scopus

卷号：109

页面范围：97-103

ISSN号：0927-0256

关键字：Nanoparticle; Lubricant; Molecular dynamics; Load-carrying capacity

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.