Bio-inspired scale-like surface textures and their tribological properties
Bio-inspired scale-like surface textures and their tribological properties
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DOI：
10.1088/1748-3190/10/4/044001
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发表时间：
2015-08-01
影响因子：
3.4
通讯作者：
Schaefer, Michael
中科院分区：
文献类型：
--
作者：
Greiner, Christian;Schaefer, Michael
摩擦、磨损和相关的能量耗散是所有包含运动部件的系统中的主要挑战。例子包括从髋关节假体上的纳米机电系统到离岸风力涡轮机。仿生方法已被证明是非常成功的，在许多工程问题，而调查的生物启发的方法在创建形态表面纹理的潜力是一个相对较新的研究领域。在这里，我们开发了激光创建的纹理，灵感来自蛇和某些蜥蜴皮肤上的鳞片。这种生物启发的表面形态减少了超过40%的干滑动摩擦力。在润滑接触中，相同的形态使摩擦增加了三倍。选择了两种不同的形态，一种具有完全重叠的鳞片，另一种具有排列在单独行中的鳞片。在润滑以及无润滑的接触，表面纹理与鳞片在行显示出较低的摩擦力比完全重叠的。我们预计，这些结果可能会有显着的影响，在所有的干滑动接触，从纳米机电和微定位系统到大规模的摩擦接触，不能润滑，例如，因为它们是在真空环境中使用。
Friction, wear and the associated energy dissipation are major challenges in all systems containing moving parts. Examples range from nanoelectromechanical systems over hip prosthesis to off-shore wind turbines. Bionic approaches have proven to be very successful in many engineering problems, while investigating the potential of a bio-inspired approach in creating morphological surface textures is a relatively new field of research. Here, we developed laser-created textures inspired by the scales found on the skin of snakes and certain lizards. Weshow that this bio-inspired surface morphology reduced dry sliding friction forces by more than 40%. In lubricated contacts the same morphology increased friction by a factor of three. Two different kinds of morphologies, one with completely overlapping scales and one with the scales arranged in individual rows, were chosen. In lubricated as well as unlubricated contacts, the surface texture with the scales in rows showed lower friction forces than the completely overlapping ones. We anticipate that these results could have significant impact in all dry sliding contacts, ranging from nanoelectromechanical and micro-positioning systems up to large-scale tribological contacts which cannot be lubricated, e.g. because they are employed in a vacuum environment.