Atomic scale study of friction and energy dissipation

Date
2003-05
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
Wear
Print ISSN
0043-1648
Electronic ISSN
Publisher
Elsevier
Volume
254
Issue
9
Pages
911 - 916
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
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Abstract

This paper presents an analysis of the interaction energy and various forces between two surfaces, and the microscopic study of friction. Atomic-scale simulations of dry sliding friction and boundary lubrication are based on the classical molecular dynamics (CMD) calculations using realistic empirical potentials. The dry sliding of a single metal asperity on an incommensurate substrate surface exhibits a quasi-periodic variation of the lateral force with two different stick-slip stage involving two structural transformation followed by a wear. The contact area of the asperity increases discontinuously with increasing normal force. Xe atoms placed between two atomically flat Ni surfaces screen the Ni-Ni interaction, decrease the corrugation of the potential energy as well as the friction force at submonolayer coverage. We present a phononic model of energy dissipation from an asperity to the substrates. (C) 2003 Elsevier Science B.V. All rights reserved.

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Keywords
Atomic-scale study, Friction, Stick-slip
Citation
Published Version (Please cite this version)