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- Publisher Website: 10.1103/PhysRevB.71.064109
- Scopus: eid_2-s2.0-16344394981
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Article: Point defect dynamics in bcc metals
Title | Point defect dynamics in bcc metals |
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Authors | |
Issue Date | 2005 |
Citation | Physical Review B - Condensed Matter and Materials Physics, 2005, v. 71, n. 6, article no. 064109 How to Cite? |
Abstract | We present an analysis of the time evolution of self-interstitial atom and vacancy (point defect) populations in pure bcc metals under constant irradiation flux conditions. Mean-field rate equations are developed in parallel to a kinetic Monte Carlo (kMC) model. When only considering the elementary processes of defect production, defect migration, recombination and absorption at sinks, the kMC model and rate equations are shown to be equivalent and the time evolution of the point defect populations is analyzed using simple scaling arguments. We show that the typically large mismatch of the rates of interstitial and vacancy migration in bcc metals can lead to a vacancy population that grows as the square root of time. The vacancy cluster size distribution under both irreversible and reversible attachment can be described by a simple exponential function. We also consider the effect of highly mobile interstitial clusters and apply the model with parameters appropriate for vanadium and α-iron. ©2005 The American Physical Society. |
Persistent Identifier | http://hdl.handle.net/10722/303235 |
ISSN | 2014 Impact Factor: 3.736 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Rottler, Jörg | - |
dc.contributor.author | Srolovitz, David J. | - |
dc.contributor.author | Car, Roberto | - |
dc.date.accessioned | 2021-09-15T08:24:54Z | - |
dc.date.available | 2021-09-15T08:24:54Z | - |
dc.date.issued | 2005 | - |
dc.identifier.citation | Physical Review B - Condensed Matter and Materials Physics, 2005, v. 71, n. 6, article no. 064109 | - |
dc.identifier.issn | 1098-0121 | - |
dc.identifier.uri | http://hdl.handle.net/10722/303235 | - |
dc.description.abstract | We present an analysis of the time evolution of self-interstitial atom and vacancy (point defect) populations in pure bcc metals under constant irradiation flux conditions. Mean-field rate equations are developed in parallel to a kinetic Monte Carlo (kMC) model. When only considering the elementary processes of defect production, defect migration, recombination and absorption at sinks, the kMC model and rate equations are shown to be equivalent and the time evolution of the point defect populations is analyzed using simple scaling arguments. We show that the typically large mismatch of the rates of interstitial and vacancy migration in bcc metals can lead to a vacancy population that grows as the square root of time. The vacancy cluster size distribution under both irreversible and reversible attachment can be described by a simple exponential function. We also consider the effect of highly mobile interstitial clusters and apply the model with parameters appropriate for vanadium and α-iron. ©2005 The American Physical Society. | - |
dc.language | eng | - |
dc.relation.ispartof | Physical Review B - Condensed Matter and Materials Physics | - |
dc.title | Point defect dynamics in bcc metals | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1103/PhysRevB.71.064109 | - |
dc.identifier.scopus | eid_2-s2.0-16344394981 | - |
dc.identifier.volume | 71 | - |
dc.identifier.issue | 6 | - |
dc.identifier.spage | article no. 064109 | - |
dc.identifier.epage | article no. 064109 | - |
dc.identifier.eissn | 1550-235X | - |
dc.identifier.isi | WOS:000228013500022 | - |