油溶性纳米TiO_2提高GL-5车辆齿轮油承载能力的研究  

Application Study of Soluble Nano-TiO_2 Additive in GL-5 Automobile Gear Oil

作　　者：张立[1] 李久盛[1] 伏喜胜[1] 张龙华[1] 

机构地区：[1]中国石油兰州润滑油研究开发中心,甘肃兰州730060

出　　处：《润滑与密封》2007年第5期123-126,共4页Lubrication Engineering

基　　金：国家973计划资助项目(2007CB607606).

摘　　要：以硬脂酸作为修饰剂,利用溶胶-凝胶法制备了油溶性纳米TiO2颗粒,将其加入85W/90GL-5重负荷车辆齿轮油中,用四球摩擦磨损试验机考察了油品的摩擦学性能,并采用SEM、XPS对摩擦试验后的钢球磨斑表面进行了分析,对纳米TiO2在摩擦过程中的摩擦学作用机制进行了研究。结果表明纳米TiO2添加剂能够显著提高GL-5车辆齿轮油的承载能力;纳米TiO2在摩擦过程中发生分解,在摩擦表面形成硬度较高的纳米薄膜,也可以扩散渗透到金属基体中,从而使保护层不易被剥落。A novel soluble nano-TiO2, which prepared by sol-gel and modified by stearic acid was added into 85W/90 GL-5 heavy load automobile gear oil, the tribological property of the oil was evaluated using four-ball extreme pressure tester, the wear scar of the steel ball was analyzed using SEM and XPS techniques and the tribology mechanism of nano- TiO2 was studied. The results show that the extreme pressure property of GL-5 car gear oil is improved by nano-TiO2 evidently, the nano-particles is decomposed during the friction process to form harder nano-film on metal surface or diffuse into base metal, so the protective film is hardly to be sheared.

关 键 词：纳米TIO2 齿轮油 润滑油添加剂 

分 类 号：TF626.3[冶金工程—钢铁冶金] TH117[机械工程—机械设计及理论]