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- Publisher Website: 10.1016/j.actamat.2005.07.032
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Article: A size effect in grain boundary migration: A molecular dynamics study of bicrystal thin films
Title | A size effect in grain boundary migration: A molecular dynamics study of bicrystal thin films |
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Authors | |
Keywords | Molecular dynamics Nanostructure Thin films Grain boundary migration |
Issue Date | 2005 |
Citation | Acta Materialia, 2005, v. 53, n. 20, p. 5273-5279 How to Cite? |
Abstract | Molecular dynamics simulations of stress-driven grain boundary migration in bicrystal thin films demonstrate that the grain boundary mobility decreases as the films are made thinner. Examination of the surface morphology proves that this effect is not associated with grain boundary grooving. The simulation data demonstrate that the grain boundary mobility is a linear function of the inverse thickness. We present a simple model to explain this effect based upon the fundamental mechanism of grain boundary migration: the collective rearrangement of a large group of atoms. Decreasing system size implies that more of the boundary is near the surface. The presence of the free surface interferes with the collective rearrangement of the atoms during boundary motion and hence slows the migration. A simple heuristic analysis, based on this effect, is consistent with the observed functional dependence of boundary mobility on bicrystal thickness. © 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
Persistent Identifier | http://hdl.handle.net/10722/303255 |
ISSN | 2023 Impact Factor: 8.3 2023 SCImago Journal Rankings: 2.916 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Zhou, Lang | - |
dc.contributor.author | Zhang, Hao | - |
dc.contributor.author | Srolovitz, David J. | - |
dc.date.accessioned | 2021-09-15T08:24:56Z | - |
dc.date.available | 2021-09-15T08:24:56Z | - |
dc.date.issued | 2005 | - |
dc.identifier.citation | Acta Materialia, 2005, v. 53, n. 20, p. 5273-5279 | - |
dc.identifier.issn | 1359-6454 | - |
dc.identifier.uri | http://hdl.handle.net/10722/303255 | - |
dc.description.abstract | Molecular dynamics simulations of stress-driven grain boundary migration in bicrystal thin films demonstrate that the grain boundary mobility decreases as the films are made thinner. Examination of the surface morphology proves that this effect is not associated with grain boundary grooving. The simulation data demonstrate that the grain boundary mobility is a linear function of the inverse thickness. We present a simple model to explain this effect based upon the fundamental mechanism of grain boundary migration: the collective rearrangement of a large group of atoms. Decreasing system size implies that more of the boundary is near the surface. The presence of the free surface interferes with the collective rearrangement of the atoms during boundary motion and hence slows the migration. A simple heuristic analysis, based on this effect, is consistent with the observed functional dependence of boundary mobility on bicrystal thickness. © 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. | - |
dc.language | eng | - |
dc.relation.ispartof | Acta Materialia | - |
dc.subject | Molecular dynamics | - |
dc.subject | Nanostructure | - |
dc.subject | Thin films | - |
dc.subject | Grain boundary migration | - |
dc.title | A size effect in grain boundary migration: A molecular dynamics study of bicrystal thin films | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.actamat.2005.07.032 | - |
dc.identifier.scopus | eid_2-s2.0-27144483323 | - |
dc.identifier.volume | 53 | - |
dc.identifier.issue | 20 | - |
dc.identifier.spage | 5273 | - |
dc.identifier.epage | 5279 | - |
dc.identifier.isi | WOS:000235919800002 | - |