Photoacoustic characterization of phase transitions in amorphous metal alloys

In this work a pulsed laser photoacoustic technique is employed in amorphous alloys for the characterization of crystallization temperatures and the determination of the activation energies for the transitions. It is shown that the changes produced in the photoacoustic signal generated by low energy...

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Detalles Bibliográficos
Autores: Orzi, Daniel Jesús Omar, Bilmes, Gabriel Mario, Tocho, Jorge Omar, Mingolo, Nélida, Martínez, Oscar Eduardo
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:1998
País:Argentina
Institución:Universidad Nacional de La Plata
Repositorio:SEDICI (UNLP)
Idioma:español
OAI Identifier:oai:sedici.unlp.edu.ar:10915/44591
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/44591
Access Level:acceso abierto
Palabra clave:Ciencias Exactas
material amorfo
Rayos Láser
resistivity measurements
laser photoacoustic technique
amorphous alloys
crystallization
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repository_id_str
spelling Photoacoustic characterization of phase transitions in amorphous metal alloysOrzi, Daniel Jesús OmarBilmes, Gabriel MarioTocho, Jorge OmarMingolo, NélidaMartínez, Oscar EduardoCiencias Exactasmaterial amorfoRayos Láserresistivity measurementslaser photoacoustic techniqueamorphous alloyscrystallizationIn this work a pulsed laser photoacoustic technique is employed in amorphous alloys for the characterization of crystallization temperatures and the determination of the activation energies for the transitions. It is shown that the changes produced in the photoacoustic signal generated by low energy laser pulses (< 200 μJ), is a sensitive probe for detecting the crystallization of a metallic amorphous sample. A piezoelectric transducer attached to the sample by means of a glass substrate was used for the acoustic detection. The developed technique has the advantages of requiring a minimum amount of sample, with no special sample preparation or conditioning. In order to demonstrate the validity of the technique, it was applied to the study of the crystallization processes of the amorphous Mg-Zn alloy, comparing the result with respect to resistivity measurements.Facultad de Ciencias Exactas1998info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf245-249http://sedici.unlp.edu.ar/handle/10915/44591spainfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2024-05-08T12:40:47Zoai:sedici.unlp.edu.ar:10915/44591Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292024-05-08 12:40:47.893SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Photoacoustic characterization of phase transitions in amorphous metal alloys
title Photoacoustic characterization of phase transitions in amorphous metal alloys
spellingShingle Photoacoustic characterization of phase transitions in amorphous metal alloys
Orzi, Daniel Jesús Omar
Ciencias Exactas
material amorfo
Rayos Láser
resistivity measurements
laser photoacoustic technique
amorphous alloys
crystallization
title_short Photoacoustic characterization of phase transitions in amorphous metal alloys
title_full Photoacoustic characterization of phase transitions in amorphous metal alloys
title_fullStr Photoacoustic characterization of phase transitions in amorphous metal alloys
title_full_unstemmed Photoacoustic characterization of phase transitions in amorphous metal alloys
title_sort Photoacoustic characterization of phase transitions in amorphous metal alloys
dc.creator.none.fl_str_mv Orzi, Daniel Jesús Omar
Bilmes, Gabriel Mario
Tocho, Jorge Omar
Mingolo, Nélida
Martínez, Oscar Eduardo
author Orzi, Daniel Jesús Omar
author_facet Orzi, Daniel Jesús Omar
Bilmes, Gabriel Mario
Tocho, Jorge Omar
Mingolo, Nélida
Martínez, Oscar Eduardo
author_role author
author2 Bilmes, Gabriel Mario
Tocho, Jorge Omar
Mingolo, Nélida
Martínez, Oscar Eduardo
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
material amorfo
Rayos Láser
resistivity measurements
laser photoacoustic technique
amorphous alloys
crystallization
topic Ciencias Exactas
material amorfo
Rayos Láser
resistivity measurements
laser photoacoustic technique
amorphous alloys
crystallization
description In this work a pulsed laser photoacoustic technique is employed in amorphous alloys for the characterization of crystallization temperatures and the determination of the activation energies for the transitions. It is shown that the changes produced in the photoacoustic signal generated by low energy laser pulses (< 200 μJ), is a sensitive probe for detecting the crystallization of a metallic amorphous sample. A piezoelectric transducer attached to the sample by means of a glass substrate was used for the acoustic detection. The developed technique has the advantages of requiring a minimum amount of sample, with no special sample preparation or conditioning. In order to demonstrate the validity of the technique, it was applied to the study of the crystallization processes of the amorphous Mg-Zn alloy, comparing the result with respect to resistivity measurements.
publishDate 1998
dc.date.none.fl_str_mv 1998
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/44591
url http://sedici.unlp.edu.ar/handle/10915/44591
dc.language.none.fl_str_mv spa
language spa
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
245-249
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 15,811543

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