【摘要】 以醇盐水解沉淀法制备了40nm左右的二氧化硅粒子;用四球摩擦试验机测定了纳米SiO₂作为润滑油添加剂的摩擦性能,并利用SEM照片观察磨斑表面形貌,探讨了纳米SiO₂的抗磨机理。研究结果表明:400SN基础油的承载能力在加入纳米SiO₂后得到很大提高,并且纳米SiO₂的加入量有一最佳值。当加入量为1.5%时,P_B值增大了近1倍,达到最佳。更多还原

【Abstract】 Nano-SiO₂ particles have been prepared by the alkoxide hydrolysis-precipitation method; Using four-ball tester the authors studied the friction properties of nano-SiO₂ lubricant additive,observed the friction surface by SEM and discussed the antifriction mechanism of nano-SiO₂. The results show that the carrying capacity of 400SN base oil increases with the addition of nano-SiO₂. When nano-Si0₂ is added to 1. 5%（mass fraction）,P_B is the optimum. When addition of nano-SiO₂ continues,P_B begins to decrease. The optimum P_B is about one time more than the P_B of base oil.更多还原