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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Autores principales: Bilmes, Gabriel, Mingolo, Nélida, Martínez, Oscar Eduardo
Publicado: 1998
Materias:
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09462171_v66_n2_p245_Orzi
http://hdl.handle.net/20.500.12110/paper_09462171_v66_n2_p245_Orzi
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spelling paper:paper_09462171_v66_n2_p245_Orzi2023-06-08T15:53:52Z Photoacoustic characterization of phase transitions in amorphous metal alloys Bilmes, Gabriel Mingolo, Nélida Martínez, Oscar Eduardo Activation energy Crystallization Electric conductivity measurement Laser pulses Magnesium alloys Phase transitions Photoacoustic effect Piezoelectric transducers Pulsed laser applications Temperature measurement Pulsed laser photoacoustic methods Amorphous 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 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. © Springer-Verlag 1998. Fil:Bilmes, G.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mingolo, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Martínez, O.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1998 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09462171_v66_n2_p245_Orzi http://hdl.handle.net/20.500.12110/paper_09462171_v66_n2_p245_Orzi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Activation energy
Crystallization
Electric conductivity measurement
Laser pulses
Magnesium alloys
Phase transitions
Photoacoustic effect
Piezoelectric transducers
Pulsed laser applications
Temperature measurement
Pulsed laser photoacoustic methods
Amorphous alloys
spellingShingle Activation energy
Crystallization
Electric conductivity measurement
Laser pulses
Magnesium alloys
Phase transitions
Photoacoustic effect
Piezoelectric transducers
Pulsed laser applications
Temperature measurement
Pulsed laser photoacoustic methods
Amorphous alloys
Bilmes, Gabriel
Mingolo, Nélida
Martínez, Oscar Eduardo
Photoacoustic characterization of phase transitions in amorphous metal alloys
topic_facet Activation energy
Crystallization
Electric conductivity measurement
Laser pulses
Magnesium alloys
Phase transitions
Photoacoustic effect
Piezoelectric transducers
Pulsed laser applications
Temperature measurement
Pulsed laser photoacoustic methods
Amorphous alloys
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. © Springer-Verlag 1998.
author Bilmes, Gabriel
Mingolo, Nélida
Martínez, Oscar Eduardo
author_facet Bilmes, Gabriel
Mingolo, Nélida
Martínez, Oscar Eduardo
author_sort Bilmes, Gabriel
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 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09462171_v66_n2_p245_Orzi
http://hdl.handle.net/20.500.12110/paper_09462171_v66_n2_p245_Orzi
work_keys_str_mv AT bilmesgabriel photoacousticcharacterizationofphasetransitionsinamorphousmetalalloys
AT mingolonelida photoacousticcharacterizationofphasetransitionsinamorphousmetalalloys
AT martinezoscareduardo photoacousticcharacterizationofphasetransitionsinamorphousmetalalloys
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