Boundary lubrication properties of materials with expansive freezing

Details Boundary lubrication properties of materials with expansive freezing Boundary lubrication properties of materials with expansive freezing

2001-12-06

arxiv.org/abs/cond-mat/0112108v2

Physics

Condensed Matter

Version to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.88.245504

We have performed molecular dynamics simulations of solid-solid contacts lubricated by a model fluid displaying many of the properties of water, particularly its expansive freezing. Near the region where expansive freezing occurs, the lubricating film remains fluid, and the friction force decreases linearly as the shear velocity is reduced. No sign of stick-slip motion is observed even at the lowest velocities. We give a simple interpretation of these results, and suggest that in general good boundary lubrication properties will be found in the family of materials with expansive freezing.

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