Develop of a New Gas Lubrication System using a Rarefied Gas Effect

据报道，在部分抛光的金刚石涂层表面用于滑动的情况下，摩擦系数随着滑动速度的增加而急剧降低。据报道，表面纹理的结果在良好的摩擦学性能的滑动表面。其良好的摩擦学性能的原因可能是由于微/纳米尺度气体在滑动表面之间流动时，表面结构引起的升力。然而，人们对这些现象的认识还不够，以往的研究多是采用试错法。在本工作中，为了更清楚地理解这些现象，从理论上阐明了由微表面结构引起的高气压产生的机制。利用这里获得的知识，我们阐明了表面结构的最佳形状。滑动实验验证了理论的正确性。

It was reported that in the case where partially-polished diamond-coated surface is used for sliding, the friction coefficient is drastically reduced as sliding speed increases. It was also reported that the surface texturing results in good tribological performance of sliding surfaces. The reason of their good tribological performance may be because the lift force is induced by the surface structure in micro/nanosclale gas flow between sliding surfaces. However, the understanding of these phenomena is not enough, and, the past researches were performed by the trial-and-error method. In the present work, in order to understand these phenomena clearly, the mechanism of high gas pressure generation induced by the micro surface structure was theoretically clarified. Using the knowledge obtained here, we clarified the optimal shape of surface structure. Our theory was validated by the sliding experiment.