Investigation of the mechanism of nano-scale gas lubrication via molecular gas dynamics approach

在本研究中，我们关注的是当金刚石涂层在旋转金属盘上的滑动速度提高到2 ~ 3 m/s时出现的低摩擦。通过数值模拟的方法解决了这种低摩擦的润滑机理，并表明具有微纳米级表面结构的金刚石涂层与反金属表面之间存在着微纳米级气体流动所产生的高压，从而使金刚石涂层浮起来。我们还表明，这是微/纳米尺度气体流动所特有的新现象。

In this research, we paid attention to the low friction which appeared when the sliding speed of diamond coating on a rotating metal disk was increased to 2-3 m/s. We solved the lubrication mechanism of this low friction by way of numerical simulation and showed that the diamond coating was floated by high pressure induced by micro/nano-scale gas flow between the diamond coating with micro/nano-scale surface structure and the counter metal surface. We also showed that this was a new phenomenon peculiar to micro/nano-scale gas flow.