The oxide nanoparticles have been claimed as the lubricant additive, which are capable of alleviating wear and reducing friction for the engine components. However, how oxide nanoparticles speficially behave together with the representative additive (Zinc dialkyl dithiophosphate, ZDDP) in the formulated engine oil, is still poorly understood. The results well revealed that the addition of oxide nanoparticles provided the improved lubricity of engine oil and significant resistance to wear. The Al₂O₃ nanoparticle specifically rendered superior tribological capability compared with other nanoparticles. Furthermore, the differentials of wearing mechanism, tribofilm and interface hierarchy were clarified by means of the morphological observation and compositional characterization. This study allowed us to understand the interacting mechanism when nanoparticles being involved within commercial engine oil was presenting between the sliding contact.

氧化物纳米颗粒被认为是润滑剂添加剂，其能够减轻磨损并减少发动机部件的摩擦。然而，对于配制的发动机油中的氧化物纳米粒子与代表性添加剂（二烷基二硫代磷酸锌，ZDDP）的具体表现仍知之甚少。结果很好地表明，氧化物纳米颗粒的添加提供了改进的机油润滑性和显着的耐磨性。铝₂ O ₃与其他纳米粒子相比，纳米粒子具有更强的摩擦学性能。此外，通过形态学观察和成分表征，阐明了磨损机理，摩擦膜和界面层次的差异。这项研究使我们能够了解在滑动接触之间存在商用机油中涉及的纳米颗粒时的相互作用机理。