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...
| Autores: | , , , , |
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| 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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AR_9c417e64aeb7e2a7b3e2e41e7d1bb9c0 |
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oai:sedici.unlp.edu.ar:10915/44591 |
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AR |
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Argentina |
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Photoacoustic characterization of phase transitions in amorphous metal alloys Orzi, Daniel Jesús Omar Bilmes, Gabriel Mario Tocho, Jorge Omar Mingolo, Nélida Martínez, Oscar Eduardo Ciencias Exactas material amorfo Rayos Láser resistivity measurements laser photoacoustic technique amorphous alloys crystallization 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. Facultad de Ciencias Exactas http://sedici.unlp.edu.ar/handle/10915/44591 |
| 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 |
| 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 |
| topic |
Ciencias Exactas material amorfo Rayos Láser resistivity measurements laser photoacoustic technique amorphous alloys crystallization |
| 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. |
| publishDate |
1998 |
| format |
article |
| status_str |
publishedVersion |
| url |
http://sedici.unlp.edu.ar/handle/10915/44591 |
| language |
spa |
| eu_rights_str_mv |
openAccess |
| institution |
UNLP |
| collection |
SEDICI (UNLP) |
| reponame_str |
SEDICI (UNLP) |
| instname_str |
Universidad Nacional de La Plata |
| _version_ |
1878403595348475904 |
| publishDateSort |
1998 |
| author_browse |
Bilmes, Gabriel Mario Martínez, Oscar Eduardo Mingolo, Nélida Orzi, Daniel Jesús Omar Tocho, Jorge Omar |
| score |
6.9303427 |