Abstract:
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.
Registro:
Documento: |
Artículo
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Título: | Photoacoustic characterization of phase transitions in amorphous metal alloys |
Autor: | Orzi, D.J.; Bilmes, G.M.; Tocho, J.O.; Mingolo, N.; Martínez, O.E. |
Filiación: | Centro de Investigaciones Opticas, Universidad Nacional de La Plata, C.C. 124, 1900, La Plata, Argentina Departamento de Física, Facultad de Ingeniería, UBA, Paseo Colón 850, 1063 Buenos Aires, Argentina Departamento de Física, FCEyN-UB, Ciudad Universitaria, 1428 Buenos Aires, Argentina
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Palabras clave: | 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 |
Año: | 1998
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Volumen: | 66
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Número: | 2
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Página de inicio: | 245
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Página de fin: | 249
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DOI: |
http://dx.doi.org/10.1007/s003400050383 |
Título revista: | Applied Physics B: Lasers and Optics
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Título revista abreviado: | Appl Phys B
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ISSN: | 09462171
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CODEN: | APBOE
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09462171_v66_n2_p245_Orzi |
Referencias:
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Citas:
---------- APA ----------
Orzi, D.J., Bilmes, G.M., Tocho, J.O., Mingolo, N. & Martínez, O.E.
(1998)
. Photoacoustic characterization of phase transitions in amorphous metal alloys. Applied Physics B: Lasers and Optics, 66(2), 245-249.
http://dx.doi.org/10.1007/s003400050383---------- CHICAGO ----------
Orzi, D.J., Bilmes, G.M., Tocho, J.O., Mingolo, N., Martínez, O.E.
"Photoacoustic characterization of phase transitions in amorphous metal alloys"
. Applied Physics B: Lasers and Optics 66, no. 2
(1998) : 245-249.
http://dx.doi.org/10.1007/s003400050383---------- MLA ----------
Orzi, D.J., Bilmes, G.M., Tocho, J.O., Mingolo, N., Martínez, O.E.
"Photoacoustic characterization of phase transitions in amorphous metal alloys"
. Applied Physics B: Lasers and Optics, vol. 66, no. 2, 1998, pp. 245-249.
http://dx.doi.org/10.1007/s003400050383---------- VANCOUVER ----------
Orzi, D.J., Bilmes, G.M., Tocho, J.O., Mingolo, N., Martínez, O.E. Photoacoustic characterization of phase transitions in amorphous metal alloys. Appl Phys B. 1998;66(2):245-249.
http://dx.doi.org/10.1007/s003400050383