Dresden 2020 – scientific programme

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O: Fachverband Oberflächenphysik

O 35: Poster Session - Tribology: Surfaces and Nanostructures

O 35.3: Poster

Monday, March 16, 2020, 18:15–20:00, P1C

Temperature dependence of friction anisotropy on crystalline materials — •Jennifer Konrad, Dirk Dietzel, and Andre Schirmeisen — Institute of Applied Physics, Justus-Liebig University Giessen, 35392 Giessen, Germany

On the nanoscale, the dependence of the friction force on the sliding direction is a well-known phenomenon. This anisotropy occurs as a consequence of the surface structure and is related to different energy barrier heights along different directions of the sample surface. If the sample temperature is varied, the friction force as deduced from the thermally activated Prandtl Tomlinson Model is expected to change, which has a direct influence on the stability of the different sliding directions. In this work, the directional friction force is analyzed under UHV conditions as a function of temperature on different crystalline materials. Our results show that not only the absolute friction and the anisotropy are influenced by temperature, but also the wear depends on temperature on ionic crystals.