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Fragility of Metallic Glass Forming Liquids

Published online by Cambridge University Press:  11 February 2011

G. J. Fan ,
R. K. Wunderlich  and
H.-J. Fecht
G. J. Fan
Affiliation:
Chemical Engineering and Materials Sicence, University ofCalifornia, Davis, CA 95616, USA
R. K. Wunderlich
Affiliation:
Ulm University, Materials Division, D-89081 Ulm, Germany
H.-J. Fecht
Affiliation:
Ulm University, Materials Division, D-89081 Ulm, Germany Research Center Karlsruhe, Institute of Nanotechnology, 76021 Karlsruhe, Germany
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Abstract

Based on the available kinetic and thermodynamic data, we compare the kinetic fragility and thermodynamic fragility of different metallic glass forming liquids. The results indicate a correlation between the kinetic and thermodynamic fragility in metallic glass forming liquids, consistent with the energy landscape model which predicts a connection between the kinetic and thermodynamic properties of supercooled liquids. The metal - metalloid glass forming alloys such as PdNiCuP are found to exhibit a distinctively different correlation as compared to early – late transition metal – type metallic glass forming alloys such as ZrTiCuNiBe. For the same thermodynamic fragility the former exhibit a much larger kinetic fragility indicating that the two classes of alloys have a different liquid structure. In addition, the relationship between the kinetic fragility and the Gibbs free energy difference between the undercooled liquid and the crystalline phases has been discussed in both metal metalloid glass forming alloys and early - late transition metal – type metallic glass forming alloys.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 754: Symposium CC – Supercooled Liquids, Glass Transition and Bulk Metallic Glasses , 2002 , CC5.9
Copyright
Copyright © Materials Research Society 2003

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