基于油润滑条件下的纳米单元表面优化作用机理

Action Mechanism Optimized Surface by Nanoparticles in Oil Lubricating under Friction

依据摩擦化学反应和作用模型的建立 ,研究了油润滑介质中纳米单元表面优化作用机制 ,认为纳米粒子油润滑表面优化行为是以下途径共同作用的结果 :摩擦副表面短程作用力导致摩擦副近表面纳米粒子在表面富集 ,使表面润滑层 (膜 )的厚度增加、强度增大 ;表面富集的部分纳米粒子在摩擦条件下发生摩擦化学反应 ,生成新的化学转移膜 ;纳米粒子在摩擦过程中填平。

According to tribochemical reaction and modeling of action mechanism ,the action mechanism optimized by nanoparticles in oil lubricating under friction is studied .The surface of a couple material is optimized by the together action of three approach stated as follows: Firstly, the thickness and intensity of lubricating layers or films provided with the action improving tribological properties increase because of enrichment of nanoparticles on the surface or near surface of couple-material arising from short force. Secondly, new lubricating film is built because of tribochemical reaction concerned with nanoparticles enriched in surface under friction and wear. Thirdly, the surface of couple-material is optimized by nanoparticles, for instance machine polishing, filling and leveling up the tiny hole and crackle on surface.