Absolute concentration of free volume-type defects in ultrafine-grained Fe prepared by high-pressure torsion

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 f...

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Autores principales: Oberdorfer, Bernd, Lorenzoni, Bernd, Unger, Katrin, Sprengel, Wolfgang, Zehetbauer, Michael, Pippan, Reinhard, Würschum, Roland
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Pergamon 2010
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3140641/
https://www.ncbi.nlm.nih.gov/pubmed/21785571
http://dx.doi.org/10.1016/j.scriptamat.2010.05.007
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author Oberdorfer, Bernd
Lorenzoni, Bernd
Unger, Katrin
Sprengel, Wolfgang
Zehetbauer, Michael
Pippan, Reinhard
Würschum, Roland
author_facet Oberdorfer, Bernd
Lorenzoni, Bernd
Unger, Katrin
Sprengel, Wolfgang
Zehetbauer, Michael
Pippan, Reinhard
Würschum, Roland
author_sort Oberdorfer, Bernd
collection PubMed
description 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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spelling pubmed-31406412011-07-21 Absolute concentration of free volume-type defects in ultrafine-grained Fe prepared by high-pressure torsion Oberdorfer, Bernd Lorenzoni, Bernd Unger, Katrin Sprengel, Wolfgang Zehetbauer, Michael Pippan, Reinhard Würschum, Roland Scr Mater Article 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. Pergamon 2010-08 /pmc/articles/PMC3140641/ /pubmed/21785571 http://dx.doi.org/10.1016/j.scriptamat.2010.05.007 Text en © 2010 Elsevier Ltd. https://creativecommons.org/licenses/by-nc-nd/3.0/ Open Access under CC BY-NC-ND 3.0 (https://creativecommons.org/licenses/by-nc-nd/3.0/) license
spellingShingle Article
Oberdorfer, Bernd
Lorenzoni, Bernd
Unger, Katrin
Sprengel, Wolfgang
Zehetbauer, Michael
Pippan, Reinhard
Würschum, Roland
Absolute concentration of free volume-type defects in ultrafine-grained Fe prepared by high-pressure torsion
title Absolute concentration of free volume-type defects in ultrafine-grained Fe prepared by high-pressure torsion
title_full Absolute concentration of free volume-type defects in ultrafine-grained Fe prepared by high-pressure torsion
title_fullStr Absolute concentration of free volume-type defects in ultrafine-grained Fe prepared by high-pressure torsion
title_full_unstemmed Absolute concentration of free volume-type defects in ultrafine-grained Fe prepared by high-pressure torsion
title_short Absolute concentration of free volume-type defects in ultrafine-grained Fe prepared by high-pressure torsion
title_sort absolute concentration of free volume-type defects in ultrafine-grained fe prepared by high-pressure torsion
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3140641/
https://www.ncbi.nlm.nih.gov/pubmed/21785571
http://dx.doi.org/10.1016/j.scriptamat.2010.05.007
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