CAJ | 학술논문

选用吐温-60,司班-20,司班-80和聚醚作为纳米粒子表面改性剂,使用透射电镜(TEM)和X射线衍射仪(XRD)观察纳米表面形貌和结构.在机械式四球摩擦磨损试验机上研究纳米粒子的抗磨减摩性能.结果显示纳米CeO2粒子作为润滑油添加剂能够提高润滑油的摩擦学性能,其最佳浓度约为0.6%,其抗磨减摩机理可能是纳米粒子在相对运动面上起到"微滚珠"作用.在重载和高温条件下,纳米粒子平铺在摩擦面之间形成滑动摩擦层,以降低摩擦表面的摩擦因数和磨斑直径.
선용토온-60,사반-20,사반-80화취미작위납미입자표면개성제,사용투사전경(TEM)화X사선연사의(XRD)관찰납미표면형모화결구.재궤계식사구마찰마손시험궤상연구납미입자적항마감마성능.결과현시납미CeO2입자작위윤활유첨가제능구제고윤활유적마찰학성능,기최가농도약위0.6%,기항마감마궤리가능시납미입자재상대운동면상기도"미곤주"작용.재중재화고온조건하,납미입자평포재마찰면지간형성활동마찰층,이강저마찰표면적마찰인수화마반직경.
Suitable surfactants such as Tween-60, Span-20, Span-80 and Polyether are selected. The morphologies and constitution of nanoparticles are investigated by means of Transmission Electron Microscopy (TEM), X-Ray Diffraction (XRD). The anti-wear and friction properties are evaluated with the maximum non-seizure load and wear scar diameter on a four-ball tester. The results show that CeO2 nanoparticles as additive of lubricating oil can improve the tribological properties of the lubricating oil and the optimal concentration is about O. 6%. The mechanism of CeO2 nanoparticles anti-wear is "miniature ball bearing" effect. Under heavy load and high temperature conditions, the nanoparticles are flatted between two friction surfaces and form a sliding system which makes the friction surface more flat to reduce the friction factor and the wear value.