表面修饰SiO_2纳米微粒对锂基脂抗磨性能影响的研究  

Effect of SiO_2 Nanoparticles as Additive on Antiwear and Extreme Pressure Properties of Lithium Grease

作　　者：曹智[1] 李小红[1] 张治军[1] 党鸿辛[1] 张明[2] 王晓波[2] 刘维民[2] 

机构地区：[1]河南大学特种功能材料重点实验室,河南开封475001 [2]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000

出　　处：《摩擦学学报》2005年第5期390-393,共4页Tribology

基　　金：国家高技术研究发展计划资助项目(2002AA302607)

摘　　要：合成了表面修饰S iO2纳米微粒,利用四球摩擦磨损试验机考察了S iO2纳米微粒作为锂基脂添加剂的摩擦磨损行为,用扫描电子显微镜、能量色散谱仪和X射线光电子能谱仪对钢球磨损表面进行了分析.结果表明:S iO2纳米微粒作为锂基脂添加剂具有良好的抗磨损性能,能够显著提高锂基脂的失效载荷.这是由于在摩擦过程中,S iO2纳米微粒富集在磨损表面并形成边界润滑膜,对磨损表面起到修复作用,从而使得锂基脂的抗磨和承载能力明显提高.Surface modified SiO2 nanoparticles were synthesized. A four-ball machine was used to investigate the tribological behavior of SiO2 nanoparticles as additive in lithium grease. The worn surfaces of steel balls were analyzed by means of scanning electron microscopy （SEM）, energy dispersion spectroscopy （EDS） and X-ray photoelectron spectroscopy （XPS）. Analytical results indicate that SiO2 nanoparticles as additive can increase antiwear ability and load-carrying capacity of lithium grease. The reason is that SiO2 nanoparticles can deposited in boundary film play the role of self-replentish in the worn surface.

关 键 词：纳米微粒 润滑脂 SIO2 抗磨性能 

分 类 号：TH117.3[机械工程—机械设计及理论]