Observation of normal-force-independent superlubricity in mesoscopic graphite contacts
arXiv:1602.02557 · doi:10.1103/PhysRevB.94.081405
Abstract
We investigate the dependence of friction forces on normal load in incommensurate micrometer size contacts between atomically smooth single-crystal graphite surfaces under ambient conditions. Our experimental results show that these contacts exhibit superlubricity (super-low friction), which is robust against the application of normal load. The measured friction coefficients are essentially zero and independent of the external normal load up to a pressure of 1.67 MPa. The observation of load-independent superlubricity in micro-scale contacts is a promising result for numerous practical applications.
15 pages, 3 figures
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Cited by in corpus (5)
- Friction Fluctuations of Gold Nanoparticles in the Superlubric Regime
- Atomic-scale defects restricting structural superlubricity: Ab initio study study on the example of the twisted graphene bilayer
- Rotational instability in superlubric joints
- Atomistic mechanism of friction force independence on the normal load and other friction laws for dynamic structural superlubricity
- Interlayer interaction, shear vibrational mode, and tribological properties of two-dimensional bilayers with a commensurate moiré pattern