Abstract
In order to understand the contact phenomena of micron-sized particles, which have a tremendous impact on a variety of applications in industry and technology, direct access to the loads as well as the displacements accompanying such contacts are mandatory. Typical particle ensembles show a size variation ranging from the nanometer to the tenths of micron scale. Especially the contact behavior of particles featuring radii of several up to several tenths of microns is scarcely studied as these particles are typically too large for atomic force microscopy (AFM) based approaches and too small for conventional macroscopic testing setups. In this work a nanoindenter based approach is introduced to gain insight into the contact mechanics of micron-sized glass beads sliding on rough silicon surfaces at various constant low normal loads. The results are analyzed by a simple modified Coulomb friction law, as well as Hertz, JKR, and DMT contact theory.
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This article is published with open access at Springerlink.com
A preliminary version of this work was presented at the 3rd International Symposium on Tribology of IFToMM, Luleå, Sweden, 2013.
Jan MEYER. He received his Master degree in Chemistry in 2010 from the University Siegen, Germany. Till date, he carries out his PhD studies at the Institute of Materials Engineering at the University Siegen, Germany. His research interests include particle technology and tribological phenomena of individual particles in corresponding ensembles of micron-sized granular media.
Thorsten STAEDLER. He received his BS degree in Physics from University of Hamburg, Germany, in 1994. Subsequently, he obtained his MS and PhD degrees in Physics from the Technical University of Braunschweig, Germany, in 1998 and 2001, respectively. After spending two years as Postdoctoral Associate at Cornell University, Ithaca (NY), USA, he took the position as head of the analytical section of the Institute of Materials Engineering at the University Siegen, Germany. His research areas cover the mechanical and tribological characterization of nanostructured materials as well as thin film technology in general.
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Meyer, J., Fuchs, R., Staedler, T. et al. Effect of surface roughness on sliding friction of micron-sized glass beads. Friction 2, 255–263 (2014). https://doi.org/10.1007/s40544-014-0045-3
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DOI: https://doi.org/10.1007/s40544-014-0045-3