摘要
用适当的表面活性剂对纳米二氧化铈粒子进行表面改性处理,采用透射电镜(TEM)和X-射线衍射法(XRD)观察与测量纳米二氧化铈粒子的形貌、结构和平均直径。将改性后的纳米二氧化铈粒子作为润滑油添加剂,采用四球摩擦磨损试验机测定添加纳米二氧化铈粒子的润滑油的摩擦学性能。利用扫描电镜(SEM)观察磨斑表面形貌以及纳米二氧化铈粒子在摩擦表面的形态等,并探讨了纳米二氧化铈粒子具有优良摩擦学性能的机制。结果表明,经表面改性的纳米二氧化铈在润滑油中具有良好的分散、稳定性;纳米二氧化铈粒子的添加量为0.6%(质量分数)左右时,润滑油在室温与较高温度下均具有优良的减摩、抗磨作用。
CeO2 nanoparticles were modified by suitable surfactants, the constitute, morphology and mean diameter of surface-modified CeO2 nanoparticles were observed and measured by transmission electron microscope （TEM） and X-ray diffraction （XRD）. Used as lubricating oil additives, the tribological performances of surface-modified CeO2 nanoparticles were evaluated using a four-ball tribotester. The morphologies of wear scars and nanoparticles on the worn surfaces were observed by scanning electron microscope （ SEM ）, and the mechanism of excellent tribological property of CeO2 nanoparti- cle additives was discussed. The results show that surface-modified nanoparticles have good dispersion and stability in the lubricating oils, the lubricating oils with 0. 6% CeO2 nanoparticles have better friction reduction and anti-wear properties at atmospheric temperature and relatively higher temperature.
出处
《润滑与密封》
CAS
CSCD
北大核心
2007年第11期91-94,97,共5页
Lubrication Engineering
基金
上海市重点学科建设项目(T0601)
上海市教委科技发展基金项目(05FZ31
06FZ008)
关键词
二氧化铈
纳米粒子
润滑油添加剂
摩擦学性能
cerium oxide
nanoparticles
lubricating oil additives
tribological performances
