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Article: Grain boundary self-diffusion in Ni: Effect of boundary inclination

TitleGrain boundary self-diffusion in Ni: Effect of boundary inclination
Authors
Issue Date2005
Citation
Journal of Materials Research, 2005, v. 20, n. 5, p. 1146-1153 How to Cite?
AbstractWe examined the influence of the boundary plane on grain-boundary diffusion in Ni through a series of molecular dynamics simulations. A series of 〈010〉 ∑5 tilt boundaries, including several high symmetry and low symmetry boundary planes, were considered. The self-diffusion coefficient is a strong function of boundary inclination at low temperature but is almost independent of inclination at high temperature. At all temperatures, the self-diffusion coefficients are low when at least one of the two grains has a normal with low Miller indices. The grain boundary self-diffusion coefficient is an Arrhenius function of temperature. The logarithm of the pre-exponential factor in the Arrhenius expression was shown to be nearly proportional to the activation energy for diffusion. The activation energy for self-diffusion in a (103) symmetric tilt boundary is much higher than in boundaries with other inclinations. We discuss the origin of the boundary plane density-diffusion coefficient correlation. © 2005 Materials Research Society.
Persistent Identifierhttp://hdl.handle.net/10722/303261
ISSN
2023 Impact Factor: 2.7
2023 SCImago Journal Rankings: 0.569
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorMendelev, Mikhail I.-
dc.contributor.authorZhang, Hao-
dc.contributor.authorSrolovitz, David J.-
dc.date.accessioned2021-09-15T08:24:57Z-
dc.date.available2021-09-15T08:24:57Z-
dc.date.issued2005-
dc.identifier.citationJournal of Materials Research, 2005, v. 20, n. 5, p. 1146-1153-
dc.identifier.issn0884-2914-
dc.identifier.urihttp://hdl.handle.net/10722/303261-
dc.description.abstractWe examined the influence of the boundary plane on grain-boundary diffusion in Ni through a series of molecular dynamics simulations. A series of 〈010〉 ∑5 tilt boundaries, including several high symmetry and low symmetry boundary planes, were considered. The self-diffusion coefficient is a strong function of boundary inclination at low temperature but is almost independent of inclination at high temperature. At all temperatures, the self-diffusion coefficients are low when at least one of the two grains has a normal with low Miller indices. The grain boundary self-diffusion coefficient is an Arrhenius function of temperature. The logarithm of the pre-exponential factor in the Arrhenius expression was shown to be nearly proportional to the activation energy for diffusion. The activation energy for self-diffusion in a (103) symmetric tilt boundary is much higher than in boundaries with other inclinations. We discuss the origin of the boundary plane density-diffusion coefficient correlation. © 2005 Materials Research Society.-
dc.languageeng-
dc.relation.ispartofJournal of Materials Research-
dc.titleGrain boundary self-diffusion in Ni: Effect of boundary inclination-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1557/JMR.2005.0177-
dc.identifier.scopuseid_2-s2.0-29044439314-
dc.identifier.volume20-
dc.identifier.issue5-
dc.identifier.spage1146-
dc.identifier.epage1153-
dc.identifier.isiWOS:000229293700011-

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