纳米铜润滑油添加剂减摩抗磨及自修复性能  

Friction Reducing Anti-wear and Self-repairing Properties of Nano-Cu Additive in Lubricating Oil

作　　者：张翼东[1,2] 闫加省[2] 孙磊[2] 杨广彬[2] 张治军[2] 张平余[2] 

机构地区：[1]许昌学院表面微纳米材料研究所,许昌461000 [2]河南大学教育部特种功能材料重点实验室,开封475004

出　　处：《机械工程学报》2010年第5期74-79,共6页Journal of Mechanical Engineering

基　　金：国家重点基础研究发展计划资助项目(973计划;2007CB607606)

摘　　要：利用透射电子显微镜与电子衍射观察由二烷基二硫代磷酸原位修饰合成的铜纳米微粒的形貌和结构。在四球机上考察其作为基础润滑油添加剂的抗磨减摩性能,在环块机上考察其作为润滑油添加剂的自修复性能。结果表明,铜纳米添加剂具有良好的抗磨减摩和自修复性能。利用扫描电子显微镜观察滑块表面的磨痕形貌,利用电子天平对滑块自修复前后的质量进行称量比较,利用X射线光电子能谱仪对自修复膜表面的元素组成和化学价态进行分析,发现在300N的负荷下,纳米铜的添加量为4%时修复效果最好,试块经4h修复后滑块质量增加0.5mg,磨斑直径和摩擦因数呈现明显下降的趋势。摩擦过程中铜纳米微粒在摩擦表面形成沉积膜,这种沉积膜与表面修饰层形成的摩擦化学反应膜产生协同作用,从而表现出优良的抗磨自修复性能。Cu nanoparticles coated with dialkyl dithiophosphate （Cu-DDP） are synthesized in-situ by redox method. The size and structure of the nanoparticles are characterized by using transmission electronic microscopy （TEM） and electronic diffraction （ED） analysis. The anti-wear and friction-reducing and self-repairing behaviors of Cu-DDP as additive in base lubricating oil are investigated on both four-ball machine and MRH-3 stock-on-ring testing machine. Scanning electronic microscopy （SEM）, X-ray photoelectron spectroscopy （XPS） and electronic balance （EB） are used to study the grinding crack topography, elemental composition and chemical valence, and the quality change of the self-repairing Cu film on the stock respectively. The test results show that at a load of 300 N a 4% additive amount of Cu nanoparticles exhibits the best self-repairing performance. The stock mass increases by 0.5 mg after 4-hour testing, and the wear scar diameter and friction coefficient are obviously decreased. The Cu nanoparticles is deposited on the frictional surface to form deposited film during the fi-iction process, which could get synergetic effect with the friction chemical reaction film coated on the surface. As a result, the excellent anti-wear and self-repairing performances are obtained.

关 键 词：纳米铜添加剂 润滑油 自修复性能 机理 

分 类 号：TG156[金属学及工艺—热处理]