几种纳米粒子作为润滑脂添加剂的试验研究

Experimental study on several kinds of nanometer particle acted as additives of lubrication grease

在MRH-3高速环块摩擦磨损实验机上,研究了纳米微粒Cu,Al,Al2O3及几组混合粒子加入到通用锂基脂中的摩擦学性能。采用扫描电子显微镜(SEM)和能量色散谱仪(EDS)分析了摩擦表面的形貌和元素组成。结果表明:含有纳米Cu,Al,Al2O3及混合粒子的润滑脂对摩擦表面均有很好的减摩、修复及抗胶合能力,其中混合粒子要比单粒子具有更好的效果。通过对实验结果的分析,纳米粒子的微滚珠、吸附、填充、焊合、软剪切层等效应是改善润滑脂摩擦学性能的主要原因,适当配比的混合粒子具有良好的协同效果。

The tribological performance of nanometer particles Cu, A1, A1203 and several groups of mixed particles being added into the general purposed lithium based grease was studied on the MRH-3 high speed ring and block friction-wear experimental machine. The appearance of frictional surface and element composition were analyzed by the use of scanning electronic microscope （SEM） and energy dispersion spectrum instrument （EDS）. The result showed that： lubrication greases that containing nanometer Cu, A1, A1203 and mixed particles all have excellent antifriction, restoration and anti-veneer capabilities on the frictional surface, among them the mixed particles possesses better effect then the single particle. By means of the analysis on experimental result, the effects of micro ball, absorption, stuffing, seaming and soft sheafing layer etc. of nanometer particle are the main reason for improving the tribological performance of lubrication grease, and the properly proportioned mixed particles possesses good cooperative effects.