Computational investigation of the lubrication behaviors of dioxides and disulfides of molybdenum and tungsten in vacuum
Computational investigation of the lubrication behaviors of dioxides and disulfides of molybdenum and tungsten in vacuum作者机构：State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials and Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei University Wuhan 430062 China
出 版 物：《Friction》 (摩擦（英文版）)
年 卷 期：2017年第5卷第1期
页 面：23-31页
核心收录：
学科分类：0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）]
基 金：the National Nature Science Foundation of China the 'Top Hundred Talents' Program of Chinese Academy of Sciences and the National Key Basic Research and Development (973) Program of China (2013CB632300) for financial support
主 题：solid lubricant superlubricity first-principles molecular dynamics disulfides dioxides
摘 要：Lamellar compounds such as the disulfides of molybdenum and tungsten are widely used as additives in lubricant oils or as solid lubricants in aerospace *** dioxides of these two transition metals have identical microstructures with those of the *** differences in the lubrication behaviors of disulfide and dioxides were investigated *** dioxide and molybdenum dioxide exhibit higher bond strengths at the interface and lower interlayer interactions than those of the disulfides which indicates their ***,the topography of the electron density of the single layer nanostructure determined their sliding potential barrier;the dioxides showed a weaker electronic cloud distribution between the two neighboring oxygen atoms,which facilitated the oxygen atoms of the counterpart to go *** commensurate friction,the dioxides exhibited nearly the same value of friction work,and same was the case for the *** lower positive value of friction work for the dioxides confirmed their improved lubricity than the disulfides and the higher mechanical strength of the bulk dioxides demonstrated that they are excellent solid lubricants in vacuum.
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