纳米粒子WS2和MoS2作为润滑油添加剂的摩擦学性能实验研究

在四球摩擦磨损试验机上，研究WS2、MoS2单一纳米粒子及WS2-MoS2混合纳米粒子作为润滑油添加剂的摩擦学性能，用倒置金相显微镜观察摩擦副的磨痕表面形貌，用扫描电镜-X光电子能谱仪分析磨斑表面主要元素的化学状态，用分析式铁谱仪对磨损试验后的油样进行铁谱分析。结果表明：两种纳米粒子添加剂均具有优良的摩擦学性能，原因在于润滑后摩擦副表面混合膜的存在，改变了表面的主要磨损机制，从而使润滑油表现出良好的抗磨、减摩和极压性能。相比单一的纳米粒子，含WS2-MoS2混合纳米粒子的润滑油极压性能较差，但具有更好的抗磨减摩性能。

EXPERIMENTAL STUDY ON THE TRIBOLOGICAL PROPERTIES OF WS2 AND MoS2 NANO-PARTICLES AS LUBRICATING OIL ADDITIVES

The tribological properties of single and mixed nano-particles of WS2 and MoS2 as lubricant additives were investigated by using a four-ball tester.The surface morphology of wear scar was observed by inverted metallurgic microscope,the chemical states of several typical elements on the worn surfaces were examined by scanning energy dispersive X-ray spectrometer,and the lube oil samples after abrasion test were analyzed by ferrograph.Test results show that these two nano-particles additives both exhibit excellent tribological properties due to forming adsorption-chemical reaction mixed protection films on the surfaces of the friction pair during lubrication action,as a result,the main wear mechanisms of the surface might change,so that the lube oil displays good anti-wear,friction-reducing and extreme pressure properties.Furthermore,the mixed nano-particles show better anti-wear and friction-reducing properties than those of the single ones,though its extreme pressure property was rather weak.