Journal
FRICTION
Volume 3, Issue 2, Pages 161-169Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s40544-015-0080-8
Keywords
graphene; SiC; friction; vacuum; microtribology; anisotropy
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Funding
- Federal Ministry of Education and Research (BMBF) [03X0107D]
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We report on the frictional properties of epitaxial graphene on SiC in ultra high vacuum. Measurements have been performed using a microtribometer in the load regime of 0.5 to 1 mN. We observed that a ruby sphere sliding against graphene results in very low friction coefficients ranging from 0.02 to 0.05. The friction and also the stability of the graphene layer is higher than that under similar conditions in ambient conditions. The friction shows a load dependence. Finally it was found that graphene masks the frictional anisotropy which was observed on the SiC surface.
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