Effect of Adsorbed Additive Layers to Hydrodynamic Lubrication Performances with 10nm-Level Clearance

为了研究流体动力润滑条件下滑动表面的摩擦特性，设计了一种圆盘对圆盘摩擦试验机。在实验中，我们使用表面有数百纳米深度螺旋槽的圆盘，通过产生动水压力来保持两个圆盘在摩擦试验时平行。采用聚- α -烯烃与棕榈酸和硬脂酸混合作为润滑油，并添加润滑性添加剂。结果表明，使用添加剂-混合润滑剂时，流体动力润滑下的摩擦系数明显低于不使用添加剂时的摩擦系数。

To investigate the friction properties of sliding surfaces under hydrodynamic lubricated condition, we designed a disk-on-disk friction tester. In the experiments, we used the disks with spiral grooves of hundreds nanometer depth on the surface to keep the two disks in parallel during the friction test by the generation of hydrodynamic pressure. We used poli-alpha-olefin mixed with palmitic acid and stearic acid as lubricant with oiliness additives. As a result, the friction coefficient under hydrodynamic lubrication became obviously lower when we used the additive-mixed lubricant than that when we used the lubricant without any additives.