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Abstract:

Amorphous layers in a Mg-based alloy are studied by a resonant photoacoustic technique. The technique is shown to provide information on the crystallization temperature of a thin amorphous layer when the sample is heated. This determination provides crucial information regarding thermal stability of the treated surface, not accessible by standard calorimetric techniques. The layer analyzed is tens of micrometers thick, produced by rapid melting by a pulsed electron gun and subsequent rapid cooling towards the substrate. It is shown that the signal from the photoacoustic detection arises mainly from the volume change during crystallization at about 390 K. The volume change due to the structural relaxation of the glass before crystallization is also detected. © Springer-Verlag 2005.

Registro:

Documento: Artículo
Título:Crystallization of glassy metal surfaces in Mg-Zn alloy determined by resonant photoacoustic detection
Autor:Martínez, O.E.; Archiopoli, U.C.; Cesa, Y.; Mingolo, N.
Filiación:Departamento de Física, FCEyN-UBA, Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina
Departamento de Física, Facultad de Ingeniería-UBA, Paseo Colón 850, C1063ACV, Buenos Aires, Argentina
Palabras clave:Calorimetry; Crystallization; Magnesium alloys; Photoacoustic effect; Surface phenomena; Thermodynamic stability; Glassy metal surfaces; Pulsed electron gun; Structural relaxation; Volume change; Glass
Año:2005
Volumen:81
Número:8
Página de inicio:1667
Página de fin:1674
DOI: http://dx.doi.org/10.1007/s00339-005-3290-5
Título revista:Applied Physics A: Materials Science and Processing
Título revista abreviado:Appl Phys A
ISSN:09478396
CODEN:APAMF
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09478396_v81_n8_p1667_Martinez

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Citas:

---------- APA ----------
Martínez, O.E., Archiopoli, U.C., Cesa, Y. & Mingolo, N. (2005) . Crystallization of glassy metal surfaces in Mg-Zn alloy determined by resonant photoacoustic detection. Applied Physics A: Materials Science and Processing, 81(8), 1667-1674.
http://dx.doi.org/10.1007/s00339-005-3290-5
---------- CHICAGO ----------
Martínez, O.E., Archiopoli, U.C., Cesa, Y., Mingolo, N. "Crystallization of glassy metal surfaces in Mg-Zn alloy determined by resonant photoacoustic detection" . Applied Physics A: Materials Science and Processing 81, no. 8 (2005) : 1667-1674.
http://dx.doi.org/10.1007/s00339-005-3290-5
---------- MLA ----------
Martínez, O.E., Archiopoli, U.C., Cesa, Y., Mingolo, N. "Crystallization of glassy metal surfaces in Mg-Zn alloy determined by resonant photoacoustic detection" . Applied Physics A: Materials Science and Processing, vol. 81, no. 8, 2005, pp. 1667-1674.
http://dx.doi.org/10.1007/s00339-005-3290-5
---------- VANCOUVER ----------
Martínez, O.E., Archiopoli, U.C., Cesa, Y., Mingolo, N. Crystallization of glassy metal surfaces in Mg-Zn alloy determined by resonant photoacoustic detection. Appl Phys A. 2005;81(8):1667-1674.
http://dx.doi.org/10.1007/s00339-005-3290-5