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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1998
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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 |
| _version_ |
1768541853603332096 |