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Crystallization of Amorphous Al85Ce5Ni10 Ribbon
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Crystallization of Amorphous Al85Ce5Ni10 Ribbon

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Abstract:

In the present work the crystallization process of an aluminum-based amorphous metal have been investigated. Rapidly quenched Al85Ce5Ni10 ribbon has been produced by melt-spinning. The amorphous structure evolution during heating has been studied by a combination of X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Thermograms obtained in continuous heating regime reveal a glass transition, Tg, resulting in a supercooled liquid temperature range of ∼16°C. Multiple crystallization events were observed by isothermal annealing of the as-quenched melt-spun ribbon at temperatures below Tg; precipitation of a metastable phase in the amorphous matrix has been observed. Further heating at increasing temperatures resulted in complete crystallization with α-Al and intermetallic compounds. Kinetics analyses indicate that crystallization occurs though nucleation and three-dimensional growth.

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Periodical:

Materials Science Forum (Volume 570)

Pages:

126-131

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.570.126

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Online since:

February 2008

Authors:

C. Triveño Rios, Santiago Suriñach, Maria Dolores Baró, Claudemiro Bolfarini, Walter José Botta Filho, Claudio Shyinti Kiminami

Keywords:

Al-Ce-Ni System, Amorphous Alloy, Crystallization

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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