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

为了研究动压润滑条件下滑动表面的摩擦特性，设计了一种盘对盘摩擦试验机。在实验中，我们使用了表面上具有数百纳米深度的螺旋槽的圆盘，以在摩擦测试期间通过产生流体动压来保持两个圆盘平行。采用聚α-烯烃与棕榈酸、硬脂酸的混合物作为润滑剂，并添加油性添加剂。结果表明，在流体动力润滑条件下，添加剂混合润滑剂的摩擦系数明显低于不添加任何添加剂的润滑剂。

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.