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采用四球摩擦磨损试验机对表面修饰的纳米AlOOH粒子及纳米Fe3O4粒子在液体石蜡中的摩擦学性能进行了对比研究.结果表明:这2种纳米粒子均能提高液体石蜡的减摩耐磨性能和PB值,纳米AlOOH粒子因具有层状结构,表现出更好的减摩耐磨性能,随着纳米粒子粒径的增大,其减摩耐磨的最佳浓度出现升高的趋势.对磨斑表面的SEM、AFM和XPS分析结果表明,纳米粒子能沉积在摩擦副表面,减少摩擦副表面微凸体的直接接触,从而减少微凸体之间的犁削和黏着.
The tribological properties of nano-sized AlOOH particles and nano-sized Fe3O4 particles in liquid paraffin were studied by using a four-ball friction and wear tester.The results showed that both nano-particles could improve the tribological properties of liquid paraffin, PB value, nano-AlOOH particles due to the layered structure, showing better anti-friction and wear resistance, with the increase of the particle size of nano-particles, the anti-wear and anti-wear the best concentration of the increasing trend of the grinding The results of SEM, AFM and XPS analysis of the plaque surface show that nanoparticles can deposit on the surface of the friction pair and reduce the direct contact of asperities on the friction pair surface, thus reducing the plowing and adhesion between the microprotrusions.