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Glass-forming ability and crystallization behavior of Co62−xFexNb6Zr2B30Co62−xFexNb6Zr2B30 (x=0,16)(x=0,16) amorphous alloys with large supercooled liquid region.

Opened Access Glass-forming ability and crystallization behavior of Co62−xFexNb6Zr2B30Co62−xFexNb6Zr2B30 (x=0,16)(x=0,16) amorphous alloys with large supercooled liquid region.

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Autor: Conde Amiano, Alejandro
Conde Amiano, Clara Francisca
Roth, Stefan
Grahl, Helgard
Ostwald, A.
Eckert, J.
Borrego Moro, Josefa María
Departamento: Universidad de Sevilla. Departamento de Física de la Materia Condensada
Fecha: 2002
Publicado en: Journal of Applied Physics, 92 (11), 6607-6611
Tipo de documento: Artículo
Resumen: The kinetics of the glass transition and the crystallization process of Co 62 2 x Fe x Nb 6 Zr 2 B 30 ( x 5 0,16) amorphous alloys with large supercooled liquid region was investigated by differential scanning calorimetry. The dependence of the glass transition on the heating rate was analyzed in terms of the Vogel–Fulcher–Tamman equation. The glass-forming ability of these alloys is discussed with respect to the width of the supercooled liquid region, the reduced glass transition temperature, and the fragility parameter. The studied alloys are found to be rather strong glass formers. The crystalline phases formed after the devitrification are identified by means of x-ray diffraction and thermomagnetic measurements. The complicated crystallization process requiring long-range atomic rearrangements seems to contribute to the high stability of the supercooled liquid against crystallization.
Tamaño: 413.7Kb
Formato: PDF

URI: http://hdl.handle.net/11441/33416

DOI: http://dx.doi.org/10.1063/1.1518768

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