Abstract
It is shown that the diffusive formation of the boundary of a crystal moving uniformly over the surface of another crystal should be accompanied by flattening of the displacement fields of the crystal lattice in the vicinity of vacancies. As the relative velocity of the crystals rises, the flattening of vacancies leads to lowering of their dipole moments and an increase in the number of contact atoms on the interface between the crystals. This phenomenon should be manifested most strongly for high rates of relative motion of the bodies and for small contact areas in the nanoscopic range. It is noted that the decrease in the dipole moment of a vacancy into which a contact atom diffuses can be the reason for the passage of the kinematic interface between the contacting crystals into a quasimolten state. It is concluded that friction in a polyatomic contact should differ qualitatively from friction in the monatomic contacts created in atomic-force microscopy.
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Zh. Éksp. Teor. Fiz. 116, 157–167 (July 1999)
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Meshcheryakov, V.V., Kuznetsov, G.D. & Yuldashev, A.A. Flattening of vacancy force fields on a kinematic interface between solids. J. Exp. Theor. Phys. 89, 86–91 (1999). https://doi.org/10.1134/1.558958
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DOI: https://doi.org/10.1134/1.558958