Photoacoustic characterization of phase transitions in amorphous metal alloys

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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 principales: Orzi, Daniel Jesús Omar, Bilmes, Gabriel Mario, Tocho, Jorge Omar, Mingolo, Nélida, Martínez, Oscar Eduardo
Formato: Articulo
Lenguaje:Español
Publicado: 1998
Materias:
Ciencias Exactas
material amorfo
Rayos Láser
resistivity measurements
laser photoacoustic technique
amorphous alloys
crystallization
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/44591
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-44591
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Ciencias Exactas
material amorfo
Rayos Láser
resistivity measurements
laser photoacoustic technique
amorphous alloys
crystallization
spellingShingle Ciencias Exactas
material amorfo
Rayos Láser
resistivity measurements
laser photoacoustic technique
amorphous alloys
crystallization
Orzi, Daniel Jesús Omar
Bilmes, Gabriel Mario
Tocho, Jorge Omar
Mingolo, Nélida
Martínez, Oscar Eduardo
Photoacoustic characterization of phase transitions in amorphous metal alloys
topic_facet 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.
format Articulo
Articulo
author Orzi, Daniel Jesús Omar
Bilmes, Gabriel Mario
Tocho, Jorge Omar
Mingolo, Nélida
Martínez, Oscar Eduardo
author_facet Orzi, Daniel Jesús Omar
Bilmes, Gabriel Mario
Tocho, Jorge Omar
Mingolo, Nélida
Martínez, Oscar Eduardo
author_sort Orzi, Daniel Jesús Omar
title Photoacoustic characterization of phase transitions in amorphous metal alloys
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
publishDate 1998
url http://sedici.unlp.edu.ar/handle/10915/44591
work_keys_str_mv AT orzidanieljesusomar photoacousticcharacterizationofphasetransitionsinamorphousmetalalloys
AT bilmesgabrielmario photoacousticcharacterizationofphasetransitionsinamorphousmetalalloys
AT tochojorgeomar photoacousticcharacterizationofphasetransitionsinamorphousmetalalloys
AT mingolonelida photoacousticcharacterizationofphasetransitionsinamorphousmetalalloys
AT martinezoscareduardo photoacousticcharacterizationofphasetransitionsinamorphousmetalalloys
bdutipo_str Repositorios
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