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Glass Formation Ability and Kinetics of the Gd55Al20Ni25 Bulk Metallic Glass |
| JO Chol-Lyong;XIA Lei;DING Ding;DONG Yuan-Da |
| Institute of Materials, Shanghai University, Shanghai 200072
Center for Advanced Microanalysis, Shanghai University, Shanghai 200444 |
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| Cite this article: |
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JO Chol-Lyong, XIA Lei, DING Ding et al 2006 Chin. Phys. Lett. 23 672-674 |
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Abstract We report a new bulk glass-forming alloy Gd55Al20Ni25. The bulk sample of the alloy is prepared in the shape of rods in diameter 2mm by suction casting. The rod exhibits typical amorphous characteristics in the x-ray diffraction pattern, paramagnetic property at 300K, 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 lnФ (Ф is the heating rate) classifies the bulk metallic glasses into the intermediate category according to Angell's classification.
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| Keywords:
61.43.Dq
81.05.Kf
64.70.Kb
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Published: 01 March 2006
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