二硫化钼粘结固体润滑涂层的径向和切向微动损伤的比较研究

通过径向和切向微动试验考察了二硫化钼粘结固体润滑涂层的微动摩擦学特性 ,并利用扫描电子显微镜、能量色散谱和X射线光电子能谱等分析了两类微动损伤区的微观特征 .结果表明 :二硫化钼粘结固体润滑涂层具有良好的抗径向微动损伤性能 ;切向微动条件下无混合区存在 ,涂层损伤强烈依赖于位移幅值 ,并伴随MoS2 的氧化 ;径向微动损伤呈现切向微动部分滑移区的特征

A Comparative Study on Radial and Tangential Fretting Damage of Molybdenum Disulfide Bonded Solid Lubrication Coating

The fretting wear behavior of molybdenum disulfide bonded solid lubricating coating under radial and tangential fretting conditions were investigated by sliding against AISI-1045 steel counterpart. The fretted surfaces of the coating were analyzed by means of scanning electron microscopy, energy dispersive spectrometry, and X-ray photoelectron spectroscopy. The results show that the coating had better wear resistance under radial fretting. No mixed fretting regime existed under the condition of tangential fretting, and the fretted damage of the coating was accompanied by the oxidation of MoS 2, which was strongly dependent on the displacement amplitude. Moreover, the coating under radial fretting behaved similarly as in the partial slip regime of tangential fretting.