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Molecular dynamics simulations of atomic-scale friction in diamond-silver sliding system
Authors:PengZhe Zhu  YuanZhong Hu  Hui Wang
Institution:State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
Abstract:Molecular dynamics simulations have been performed to explore the atomic-scale sliding friction, es-pecially the stick-slip friction, in a system consisting of a diamond slider and a silver substrate. The mechanisms of the stick-slip behavior are investigated by considering sliding speeds between 10 m/s and 200 m/s.The analyses of the shear distance between the upmost layer and the downmost layer and displacements of a column of atoms in the slider show that shearing deformation of the slider is the main cause of the stick-slip phenomenon. Our simulations also present that a commensurate fit be-tween the two contact surfaces is unimportant for the stick-slip friction.
Keywords:atomic-scale friction  stick-slip  molecular dynamics simulation  shearing deformation
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