Investigation of the mending effect and mechanism of copper nano-particles on a tribologically stressed surface
Investigation of the mending effect and mechanism of copper nano-particles on a tribologically stressed surface
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DOI：
10.1007/s11249-004-8109-6
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发表时间：
2004-11-01
影响因子：
3.2
通讯作者：
Fan, R
中科院分区：
文献类型：
--
作者：
Liu, G;Li, X;Fan, R
金属纳米粒子对磨损区域的修复作用及其机理对纳米摩擦学的基本理论和润滑油添加剂的发展都具有重要意义。研究了纳米铜颗粒对润滑油的修复效果。销盘实验和扫描电子显微镜(SEM)观察表明，纳米铜颗粒确实表现出良好的修复效果。扫描隧道显微镜(STM)观察表明，修复效果是由于纳米铜颗粒沉积在磨痕上的结果。通过加热模拟还发现，由于纳米效应导致纳米铜颗粒的扩散温度降低，摩擦产生的热量导致纳米铜颗粒的扩散和随后的沉积，最终导致所谓的修补效应。
The mending effect and mechanism of metal nano-particles in an area undergoing wear are quite important for both the fundamental theory of nano-tribology and the development of lubricant additives. This paper presents research on the mending effect of copper nano-particles added to lubricant oil. Pin-on-disk experiments and Scanning Electron Microscopy (SEM) observations show that copper nano-particles do display an excellent mending effect. The observation by Scanning Tunnelling Microscopy (STM) reveals that the mending effect results from the deposition of copper nano-particles onto the wear scar. It has also been disclosed by heating simulation that, due to nano-scale effects, which bring about decrease in the diffusion temperature of copper nano-particles, the heat generated by friction leads to the diffusion of copper nano-particles and their subsequent deposition, which finally results in the so-called mending effect.