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将油酸和硅烷偶联剂(KH-560)修饰的Al_2O_3/TiO_2纳米复合粉体添加到基础油中,用可见分光光度计表征纳米粒子在润滑油中的分散稳定性,在自主设计的摩擦磨损试验机上考察Al_2O_3/TiO_2纳米复合粉体作为润滑油添加剂的抗磨减摩性能,用3D表面轮廓仪、扫描电镜和电子能谱分析试样表面形貌与成分变化及纳米粒子的作用机理。结果表明:在0.25%Al_2O_3/TiO_2纳米复合粉体(Al_2O_3∶TiO_2=1∶1)润滑油中添加2%KH-560时,具有最好的分散稳定性;在润滑油中添加0.25%Al_2O_3/TiO_2纳米复合粉体(Al_2O_3∶TiO_2=1∶1)时抗磨减摩效果最佳,在载荷500N、转速1100r/min时,摩擦系数和磨损量相比基础油时分别降低25.4%和43.8%。
Al_2O_3 / TiO_2 nanocomposite powder modified by oleic acid and silane coupling agent (KH-560) was added to the base oil, and the dispersion stability of the nanoparticles in the lubricating oil was characterized by a visible spectrophotometer. In the self-designed friction The antiwear and antifriction properties of Al_2O_3 / TiO_2 nanocomposite powders as lubricating additives were investigated on a wear tester. The surface morphology and composition of the samples and the action mechanism of the nanoparticles were analyzed by 3D surface profilometer, scanning electron microscopy and electron spectroscopy. The results show that the best dispersion stability is obtained when 2% KH-560 is added into 0.25% Al 2 O 3 / TiO 2 nanocomposite powder (Al 2 O 3: TiO 2 = 1: 1), 0.25% Al 2 O 3 / TiO 2 nanocomposite powder (Al_2O_3:TiO_2 = 1: 1) had the best antiwear and antifriction effect. Under the load of 500N and 1100r / min, the friction coefficient and wear loss decreased by 25.4% and 43.8% .