Entropy change of martensitic transformations in Cu-based shape-memory alloys

We have investigated the different contributions to the entropy change at the martensitic transition of different families of Cu-based shape-memory alloys. The total entropy change has been obtained through calorimetric measurements. By measuring the evolution of the magnetic susceptibility with tem...

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Detalhes bibliográficos
Autores: Mañosa, Lluís, Planes Vila, Antoni, Ortín, Jordi, 1959-, Martínez Benjamin, Joan Josep
Formato: artículo
Estado:Versión publicada
Fecha de publicación:1993
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/9885
Acesso em linha:https://hdl.handle.net/2445/9885
Access Level:acceso abierto
Palavra-chave:Diagrames de fase
Transformacions de fase (Física estadística)
Termodinàmica
Phase diagrams
Phase transformations (Statistical physics)
Thermodynamics
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spelling Entropy change of martensitic transformations in Cu-based shape-memory alloysMañosa, LluísPlanes Vila, AntoniOrtín, Jordi, 1959-Martínez Benjamin, Joan JosepDiagrames de faseTransformacions de fase (Física estadística)TermodinàmicaPhase diagramsPhase transformations (Statistical physics)ThermodynamicsWe have investigated the different contributions to the entropy change at the martensitic transition of different families of Cu-based shape-memory alloys. The total entropy change has been obtained through calorimetric measurements. By measuring the evolution of the magnetic susceptibility with temperature, the entropy change associated with conduction electrons has been evaluated. The contribution of the anharmonic vibrations of the lattice has also been estimated using various parameters associated with the anharmonic behavior of these alloys, collected from the literature. The results found in the present work have been compared to values published for the martensitic transition of group-IV metals. For Cu-based alloys, both electron and anharmonic contributions have been shown to be much smaller than the overall entropy change. This finding demonstrates that the harmonic vibrations of the lattice are the most relevant contribution to the stability of the bcc phase in Cu-based alloys.The American Physical Society1993info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/9885Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.48.3611Physical Review B, 1993, vol. 48, núm. 6, p. 3611-3619.http://dx.doi.org/10.1103/PhysRevB.48.3611(c) The American Physical Society, 1993info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/98852026-05-27T06:46:51Z
dc.title.none.fl_str_mv Entropy change of martensitic transformations in Cu-based shape-memory alloys
title Entropy change of martensitic transformations in Cu-based shape-memory alloys
spellingShingle Entropy change of martensitic transformations in Cu-based shape-memory alloys
Mañosa, Lluís
Diagrames de fase
Transformacions de fase (Física estadística)
Termodinàmica
Phase diagrams
Phase transformations (Statistical physics)
Thermodynamics
title_short Entropy change of martensitic transformations in Cu-based shape-memory alloys
title_full Entropy change of martensitic transformations in Cu-based shape-memory alloys
title_fullStr Entropy change of martensitic transformations in Cu-based shape-memory alloys
title_full_unstemmed Entropy change of martensitic transformations in Cu-based shape-memory alloys
title_sort Entropy change of martensitic transformations in Cu-based shape-memory alloys
dc.creator.none.fl_str_mv Mañosa, Lluís
Planes Vila, Antoni
Ortín, Jordi, 1959-
Martínez Benjamin, Joan Josep
author Mañosa, Lluís
author_facet Mañosa, Lluís
Planes Vila, Antoni
Ortín, Jordi, 1959-
Martínez Benjamin, Joan Josep
author_role author
author2 Planes Vila, Antoni
Ortín, Jordi, 1959-
Martínez Benjamin, Joan Josep
author2_role author
author
author
dc.subject.none.fl_str_mv Diagrames de fase
Transformacions de fase (Física estadística)
Termodinàmica
Phase diagrams
Phase transformations (Statistical physics)
Thermodynamics
topic Diagrames de fase
Transformacions de fase (Física estadística)
Termodinàmica
Phase diagrams
Phase transformations (Statistical physics)
Thermodynamics
description We have investigated the different contributions to the entropy change at the martensitic transition of different families of Cu-based shape-memory alloys. The total entropy change has been obtained through calorimetric measurements. By measuring the evolution of the magnetic susceptibility with temperature, the entropy change associated with conduction electrons has been evaluated. The contribution of the anharmonic vibrations of the lattice has also been estimated using various parameters associated with the anharmonic behavior of these alloys, collected from the literature. The results found in the present work have been compared to values published for the martensitic transition of group-IV metals. For Cu-based alloys, both electron and anharmonic contributions have been shown to be much smaller than the overall entropy change. This finding demonstrates that the harmonic vibrations of the lattice are the most relevant contribution to the stability of the bcc phase in Cu-based alloys.
publishDate 1993
dc.date.none.fl_str_mv 1993
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/9885
url https://hdl.handle.net/2445/9885
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.48.3611
Physical Review B, 1993, vol. 48, núm. 6, p. 3611-3619.
http://dx.doi.org/10.1103/PhysRevB.48.3611
dc.rights.none.fl_str_mv (c) The American Physical Society, 1993
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The American Physical Society, 1993
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv The American Physical Society
publisher.none.fl_str_mv The American Physical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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