Glass Formation Ability and Kinetics of the Gd 55 Al 20 Ni 25 Bulk Metallic Glass
Autor: | D. Ding, Xia Lei, JO Chol-Lyong, Dong Yuanda |
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Rok vydání: | 2006 |
Předmět: | |
Zdroj: | Chinese Physics Letters. 23:672-674 |
ISSN: | 1741-3540 0256-307X |
DOI: | 10.1088/0256-307x/23/3/041 |
Popis: | We report a new bulk glass-forming alloy Gd55Al20Ni25. The bulk sample of the alloy is prepared in the shape of rods in diameter 2 mm by suction casting. The rod exhibits typical amorphous characteristics in the x-ray diffraction pattern, paramagnetic property at 300 K, distinct glass transition and multi-step crystallization behaviour in differential scanning calorimetry traces. The glass formation ability of the alloy is investigated by using the reduced glass transition temperature Trg and the parameter γ. Kinetics of glass transition and primary crystallization is also studied. The fragility parameter m obtained from the Vogel–Fulcher–Tammann dependence of glass transition temperature Tg on ln ( is the heating rate) classifies the bulk metallic glasses into the intermediate category according to Angell's classification. |
Databáze: | OpenAIRE |
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