Influence of configurational atomic order on the relative stability of bcc and close-packed structures in Cu-based alloys

We present a study of the influence of atomic order on the relative stability of the bcc and the 18R martensitic structures in a Cu2.96Al0.92Be0.12 crystal. Calorimetric measurements have shown that disorder increases the stability of the 18R phase, contrary to what happens in Cu-Zn-Al alloys for wh...

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Autores: Jurado Cardelús, Mariàngels, Mañosa, Lluís, Planes Vila, Antoni
Formato: artículo
Estado:Versión publicada
Fecha de publicación:1993
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/9906
Acesso em linha:https://hdl.handle.net/2445/9906
Access Level:acceso abierto
Palavra-chave:Transformacions de fase (Física estadística)
Diagrames de fase
Transformacions martensítiques
Phase transformations (Statistical physics)
Phase diagrams
Martensitic transformations
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spelling Influence of configurational atomic order on the relative stability of bcc and close-packed structures in Cu-based alloysJurado Cardelús, MariàngelsMañosa, LluísPlanes Vila, AntoniTransformacions de fase (Física estadística)Diagrames de faseTransformacions martensítiquesPhase transformations (Statistical physics)Phase diagramsMartensitic transformationsWe present a study of the influence of atomic order on the relative stability of the bcc and the 18R martensitic structures in a Cu2.96Al0.92Be0.12 crystal. Calorimetric measurements have shown that disorder increases the stability of the 18R phase, contrary to what happens in Cu-Zn-Al alloys for which it is the bcc phase that is stabilized by disordering the system. This different behavior has been explained in terms of a model recently reported. We have also proved that the entropy change at the martensitic transition is independent of the state of atomic order of the crystal, as predicted theoretically. Our results suggest that differences in the vibrational spectrum of the crystal due to different states of atomic order must be equal in the bcc and in the close-packed phases.The American Physical Society200920091993info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion4 p.application/pdfhttps://hdl.handle.net/2445/9906Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.48.3540Physical Review B, 1993, vol. 48, núm. 5, p. 3540-3543.http://dx.doi.org/10.1103/PhysRevB.48.3540(c) The American Physical Society, 1993info:eu-repo/semantics/openAccessoai:recercat.cat:2445/99062026-05-29T05:05:01Z
dc.title.none.fl_str_mv Influence of configurational atomic order on the relative stability of bcc and close-packed structures in Cu-based alloys
title Influence of configurational atomic order on the relative stability of bcc and close-packed structures in Cu-based alloys
spellingShingle Influence of configurational atomic order on the relative stability of bcc and close-packed structures in Cu-based alloys
Jurado Cardelús, Mariàngels
Transformacions de fase (Física estadística)
Diagrames de fase
Transformacions martensítiques
Phase transformations (Statistical physics)
Phase diagrams
Martensitic transformations
title_short Influence of configurational atomic order on the relative stability of bcc and close-packed structures in Cu-based alloys
title_full Influence of configurational atomic order on the relative stability of bcc and close-packed structures in Cu-based alloys
title_fullStr Influence of configurational atomic order on the relative stability of bcc and close-packed structures in Cu-based alloys
title_full_unstemmed Influence of configurational atomic order on the relative stability of bcc and close-packed structures in Cu-based alloys
title_sort Influence of configurational atomic order on the relative stability of bcc and close-packed structures in Cu-based alloys
dc.creator.none.fl_str_mv Jurado Cardelús, Mariàngels
Mañosa, Lluís
Planes Vila, Antoni
author Jurado Cardelús, Mariàngels
author_facet Jurado Cardelús, Mariàngels
Mañosa, Lluís
Planes Vila, Antoni
author_role author
author2 Mañosa, Lluís
Planes Vila, Antoni
author2_role author
author
dc.subject.none.fl_str_mv Transformacions de fase (Física estadística)
Diagrames de fase
Transformacions martensítiques
Phase transformations (Statistical physics)
Phase diagrams
Martensitic transformations
topic Transformacions de fase (Física estadística)
Diagrames de fase
Transformacions martensítiques
Phase transformations (Statistical physics)
Phase diagrams
Martensitic transformations
description We present a study of the influence of atomic order on the relative stability of the bcc and the 18R martensitic structures in a Cu2.96Al0.92Be0.12 crystal. Calorimetric measurements have shown that disorder increases the stability of the 18R phase, contrary to what happens in Cu-Zn-Al alloys for which it is the bcc phase that is stabilized by disordering the system. This different behavior has been explained in terms of a model recently reported. We have also proved that the entropy change at the martensitic transition is independent of the state of atomic order of the crystal, as predicted theoretically. Our results suggest that differences in the vibrational spectrum of the crystal due to different states of atomic order must be equal in the bcc and in the close-packed phases.
publishDate 1993
dc.date.none.fl_str_mv 1993
2009
2009
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/2445/9906
url https://hdl.handle.net/2445/9906
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.48.3540
Physical Review B, 1993, vol. 48, núm. 5, p. 3540-3543.
http://dx.doi.org/10.1103/PhysRevB.48.3540
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 4 p.
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:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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