Greiner Christian, Schäfer Michael, Popp Uwe, Gumbsch Peter
Institute for Applied Materials IAM, Karlsruhe Institute of Technology (KIT) , Kaiserstrasse 12, 76131 Karlsruhe, Germany.
ACS Appl Mater Interfaces. 2014 Jun 11;6(11):7986-90. doi: 10.1021/am500879m. Epub 2014 May 20.
The morphological texturing of surfaces has demonstrated its high potential to maximize adhesion as well as to reduce friction and wear. A key to understanding such phenomena is a principle known as contact splitting. Here, we extend this concept to the static friction behavior of dimpled surfaces. Our results indicate that contact splitting does exist for such structures and that with certain dimple sizes and depths static friction values significantly exceeding those of untextured surfaces can be obtained. These results can be applied to all surfaces where friction forces are to be tuned, from nanoelectromechanical systems up to combustion engines.
表面的形态纹理化已证明其在最大化附着力以及减少摩擦和磨损方面具有巨大潜力。理解此类现象的一个关键是一种称为接触分裂的原理。在此，我们将这一概念扩展到微凹表面的静摩擦行为。我们的结果表明，此类结构确实存在接触分裂，并且在特定的凹坑尺寸和深度下，可以获得明显超过无纹理表面的静摩擦值。这些结果可应用于所有需要调节摩擦力的表面，从纳米机电系统到内燃机。
