Minimize friction of lubricated laser-microtextured-surfaces by tuning microholes depth
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- 作者：Michele Scaraggi
- 关键词：Surface texturing ; Laser ablation ; Friction ; Lubrication
- 刊名：Tribology International
- 出版年：July 2014
- 年：2014
- 卷：75
- 期：Complete
- 页码：123-127
- 全文大小：679 K
文摘
We have investigated the friction properties of lubricated laser micro-textured surfaces. The micro-texture consists of a square lattice of micro-holes whose diameter, depth and spacing are controlled during the laser texturing process. All surfaces have the same texture area density, but different diameters and depths of the micro-holes. We measure the coefficient of friction on a range of sliding velocities from the mixed lubrication regime to the hydrodynamic regime. We find that the depth and the diameter of the micro-holes have a huge influence in determining the amount of friction reduction at the interface. Interestingly experiments also show that optimal micro-hole depth values, minimizing the friction in the hydrodynamic regime, are remarkably effective also in the mixed lubrication regime.