Contact, nanoindentation, and sliding friction

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buir.contributor.authorÇıracı, Salim
buir.contributor.orcidÇıracı, Salim|0000-0001-8023-9860
dc.citation.epage2476en_US
dc.citation.issueNumber4en_US
dc.citation.spage2468en_US
dc.citation.volumeNumber57en_US
dc.contributor.authorBuldum, A.en_US
dc.contributor.authorÇıracı, Salimen_US
dc.contributor.authorBatra, I. P.en_US
dc.date.accessioned2016-02-08T10:43:10Z
dc.date.available2016-02-08T10:43:10Z
dc.date.issued1998en_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractThis paper presents an atomic-scale study of contact, indentation, and subsequent pulling and dry sliding of a sharp and blunt metal tip on a metal surface. The evolution of atomic structure and the variation of perpendicular and lateral forces are calculated by molecular-dynamics methods using an empirical potential based on the embedded-atom model. The sharp tip experiences multiple jumps to contact in the attractive force range. The contact interface grows discontinuously mainly due to disorder-order transformation leading to disappearance of a layer and hence abrupt changes in the normal-force variation. Atom exchange occurs in the repulsive range. During the pulling off, the connective neck is reduced discontinuously; however, not all the abrupt changes of the pulling force are associated with the creation of a new layer in the neck. The sliding of the sharp tip (or single asperity) induces two consecutive structural transformations that occur periodically, but end with the wear of a layer. The situation for a blunt tip is, however, quite different.en_US
dc.identifier.issn0163-1829
dc.identifier.urihttp://hdl.handle.net/11693/25342
dc.language.isoEnglishen_US
dc.publisherAmerican Physical Societyen_US
dc.source.titlePhysical Review B - Condensed Matter and Materials Physicsen_US
dc.titleContact, nanoindentation, and sliding frictionen_US
dc.typeArticleen_US

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