Dependence of boundary lubrication on the misfit angle between the sliding surfaces

Abstract

Using molecular dynamics based on Langevin equations with a coordinate- and velocity-dependent damping coefficient, we study the frictional properties of a thin layer of "soft" lubricant (where the interaction within the lubricant is weaker than the lubricant-substrate interaction) confined between two solids. At low driving velocities the system demonstrates stick-slip motion. The lubricant may or may not be melted during sliding, thus exhibiting either the "liquid sliding" (LS) or the "layer over layer sliding" (LoLS) regimes. The LoLS regime mainly operates at low sliding velocities. We investigate the dependence of friction properties on the misfit angle between the sliding surfaces and calculate the distribution of static frictional thresholds for a contact of polycrystalline surfaces.

8 pages, 11 figures

References in corpus (4)

• Atomistic simulations of the sliding friction of graphene flakes
• Stability of superlubric sliding on graphite
• Modeling friction on a mesoscale: Master equation for the earthquake-like model
• Exactly quantized dynamics of classical incommensurate sliders

Cited by in corpus (6)

• Dependence of kinetic friction on velocity: Master equation approach
• Friction and Nonlinear Dynamics
• Size scaling of static friction
• Crystalline misfit-angle implications for solid sliding
• Soliton dynamics in a solid lubricant during sliding friction
• Sliding states of a soft-colloid cluster crystal: Cluster versus single-particle hopping