Tribological properties and lubricating mechanisms of Cu nanoparticles in lubricant  

作　　者：于鹤龙 许一 史佩京 徐滨士 王晓丽 刘谦 

机构地区：[1]National Key Laboratory for Remanufacturing,Academy of Armored Force Engineering

出　　处：《中国有色金属学会会刊：英文版》2008年第3期636-641,共6页Transactions of Nonferrous Metals Society of China

基　　金：Project(2007CB607601) supported by the National Basic Research Program of China;Project(50735006) supported by the National Natural Science Foundation of China;Project(9140C8502010702) supported by the National Key Laboratory for Remanufacturing Foundation;Project(9140A27030206OC8501) supported by the Key Program for Pre-research of Chinese Government

摘　　要：Wear and friction properties of surface modified Cu nanoparticles as 50CC oil additive were studied. The effect of temperature on tribological properties of Cu nanoparticles was investigated on a four-ball tester. The morphologies, typical element distribution and chemical states of the worn surfaces were characterized by SEM, EDS and XPS, respectively. In order to further investigate the tribological mechanism of Cu nanoparticles, a nano-indentation tester was utilized to measure the micro mechanical properties of the worn surface. The results indicate that the higher the oil temperature applied, the better the tribological properties of Cu nanoparticles are. It can be inferred that a thin copper protective film with lower elastic modulus and hardness is formed on the worn surface, which results in the good tribological performances of Cu nanoparticles, especially when the oil temperature is higher.Wear and friction properties of surface modified Cu nanoparticles as 50CC oil additive were studied. The effect of temperature on tribological properties of Cu nanoparticles was investigated on a four-ball tester. The morphologies, typical element distribution and chemical states of the worn surfaces were characterized by SEM, EDS and XPS, respectively. In order to further investigate the tribological mechanism of Cu nanoparticles, a nano-indentation tester was utilized to measure the micro mechanical properties of the worn surface. The results indicate that the higher the oil temperature applied, the better the tribological properties of Cu nanoparticles are. It can be inferred that a thin copper protective film with lower elastic modulus and hardness is formed on the worn surface, which results in the good tribological performances ofCu nanoparticles, especially when the oil temperature is higher.

关 键 词：铜 纳米颗粒 摩擦作用 润滑机械 薄膜 温度 

分 类 号：TB383.1[一般工业技术—材料科学与工程]