| Absolute concentration of free volume-type defects in ultrafine-grained Fe prepared by high-pressure torsion. | |
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MedLine Citation:
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PMID: 21785571 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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A maximum excess volume ΔV/V ≈ 1.9 × 10(-3) in ultrafine-grained Fe prepared by high-pressure torsion is determined by measurements of the irreversible length change upon annealing employing a high-resolution differential dilatometer. Since dislocations and equilibrium-type grain boundaries cannot fully account for the observed released excess volume, the present study yields evidence for a high concentration of free volume-type defects inherent to nanophase materials, which is considered to be the main source of their particular properties, such as strongly enhanced diffusivities. |
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Authors:
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Bernd Oberdorfer; Bernd Lorenzoni; Katrin Unger; Wolfgang Sprengel; Michael Zehetbauer; Reinhard Pippan; Roland Würschum |
Publication Detail:
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Type: JOURNAL ARTICLE |
Journal Detail:
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Title: Scripta materialia Volume: 63 ISSN: 1359-6462 ISO Abbreviation: - Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2011-7-25 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101322196 Medline TA: Scr Mater Country: - |
Other Details:
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Languages: ENG Pagination: 452-455 Citation Subset: - |
Affiliation:
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Institut für Materialphysik, Technische Universität Graz, Petersgasse 16, A-8010 Graz, Austria. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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