Ultra-Low Friction and Stiffness Dependence of Interlayer Friction in Graphite Flakes Under Various Rotation Angles
نویسندگان
چکیده
منابع مشابه
Environmental dependence of atomic-scale friction at graphite surface steps
Philip Egberts,1 Zhijiang Ye,2 Xin Z. Liu,1 Yalin Dong,3 Ashlie Martini,2,* and Robert W. Carpick1,† 1Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, 220 South 33rd Street, Philadelphia, Pennsylvania 19104, USA 2School of Engineering, University of California Merced, 5200 North Lake Road, Merced, California 95343, USA 3School of Mechanical Engineering, Pu...
متن کاملNon-monotonic dependence of the friction coefficient on heterogeneous stiffness
The complexity of the frictional dynamics at the microscopic scale makes difficult to identify all of its controlling parameters. Indeed, experiments on sheared elastic bodies have shown that the static friction coefficient depends on loading conditions, the real area of contact along the interfaces and the confining pressure. Here we show, by means of numerical simulations of a 2D Burridge-Kno...
متن کاملTemperature dependence of friction under cryogenic conditions in vacuum
We have constructed a sliding block cryotribometer designed to measure friction at cryogenic temperatures and UHV conditions. An optical cryostat and high speed video was used to monitor the motion of the block. The temperature range of the measurements was 4–460 K. Both the static and dynamic friction coefficients were determined for a steel ball on stainless steel, sapphire, and PTFE (Teflon)...
متن کاملLow friction and rotational dynamics of crystalline flakes in solid lubrication
Solids at incommensurate contact display low-friction, ’superlubric’, sliding. For graphene flakes on a graphite surface, superlubric sliding is only temporary due to rotation of the flakes from incommensurate to commensurate contact with the substrate. We examine this rotational channel of friction in a prototype geometry of mesoand macroscopic solid lubrication. By molecular dynamics simulati...
متن کاملUltra-low friction of gold nanocrystals on graphene
Recent calculations [Guerra et al, Nature Materials, 9 634 (2010)] have predicted that gold nanocrystals slide on graphite with two radically different friction coefficients depending on their speeds. At low speeds (~μm/sec), nanocrystals on graphite are expected to possess higher friction, consistent with previous studies of thermal diffusion of gold on graphite and on graphene. At high slidin...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Social Science Research Network
سال: 2022
ISSN: ['1556-5068']
DOI: https://doi.org/10.2139/ssrn.4165824