Tribological Behavior of Very Thin Confined Films

Details Tribological Behavior of Very Thin Confined Films Tribological Behavior of Very Thin Confined Films

2000-12-07

arxiv.org/abs/cond-mat/0012100v1

Physics

Condensed Matter

Materials Science

7 pages, 6 figures

Scientific paper

The tribological properties of two smooth surfaces in the presence of a thin confined film are investigated with a generic model for the interaction between two surfaces and with computer simulations. It is shown that at large normal contact pressures, an ultra thin film automatically leads to static friction between two flat surfaces - even if the surfaces are incommensurate. Commensurability is nevertheless the key quantity to understand the tribological behavior of the contact. Qualitative differences between commensurate and incommensurate contacts remain even in the presence of a thin film. The differences mainly concern the thermal diffusion of the contact and the transition between smooth sliding and stick-slip.

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