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Title:
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Aging and structural relaxation of hyper-quenched Mg65Cu25Y10 metallic glass
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Author:
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Zhai, Fuqiang; Pineda Soler, Eloi; Ruta, Beatrice; Gonzalez Silveira, Marta; Crespo Artiaga, Daniel
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear; Universitat Politècnica de Catalunya. Departament de Física Aplicada; Universitat Politècnica de Catalunya. GCM - Grup de Caracterització de Materials |
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Abstract:
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The structural relaxation, glass transition and crystallization processes of Mg65Cu25Y10 metallic glass are studied by Differential Scanning Calorimetry (DSC) and Mechanical spectroscopy. The relaxation model derived from the mechanical measurements is compared with the kinetics of these transformations obtained from the DSC curves. The structural relaxation kinetics is found to be controlled by the glassy dynamics following an Adams-Gibbs-Vogel function. The glass transition and crystallization kinetics are controlled by the dynamics of the supercooled melt following a Vogel-Fulcher-Tammann behaviour. The results suggest that the microscopic processes responsible of structural relaxation and aging below the glass transition correspond to the same processes generating the a-relaxation peak. (C) 2013 Elsevier B.V. All rights reserved. |
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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Física
-Àrees temàtiques de la UPC::Enginyeria dels materials
-Metallic glasses
-Amorphous materials
-Metals--Rapid solidification processing
-Rapid-solidification
-Metallic glasses
-Relaxation kinetics
-Alpha relaxation
-Mechanical spectroscopy
-DSC
-JOHARI-GOLDSTEIN RELAXATION
-TEMPERATURE
-KINETICS
-Cristalls metàl·lics
-Solidificació de metalls |
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Rights:
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Document type:
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Article - Submitted version
Article |
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