NDLI: Icosahedral Cluster Energetics in Zr$_{60}$Cu$_{10}$Al$_{15}$Ni$_{15}$ Bulk Metallic Glass and Their Role on Solidification Behavior

Content Provider	Springer Nature Link
Author	Vincent, S. Satish Idury, K. S. N. Gokhale, Aditya Basu, Joysurya Murty, B. S. Bhatt, Jatin
Copyright Year	2015
Abstract	The energetics behind transformation of liquid structure into subsequent intermediate phases during solidification is expected to play a decisive role in glass/crystal formation. A great deal of experimental and simulation work on supercooled liquids has indicated that, there exists a close link between the liquid structure and icosahedral clusters, especially for bulk metallic glass forming liquids. Pertinently, icosahedral clusters are also found to be energetically favorable to form upon devitrification of Zr$_{60}$Cu$_{10}$Al$_{15}$Ni$_{15}$ glassy alloy. Such evolution of icosahedral clusters upon devitrification in this alloy invariably proves their manifestation at the intermediate stage during transition of supercooled liquid into glass. Hence understanding the energetics behind restructuring of these clusters into glass or crystal during solidification, aids in microstructure optimization of glass/crystal composites for structural and functional applications. In this paper, it has been attempted to investigate the energetics behind the evolution of Zr–Ni and Zr–Al binary intermetallic phases during crystallization of Zr$_{60}$Cu$_{10}$Al$_{15}$Ni$_{15}$ glassy alloy. Ascalaph Designer Molecular Modeling Suite is used to generate different models of clusters to understand the formation of Zr–Ni and Zr–Al phases. We propose solidification mechanism in this alloy via two steps, namely, formation of intermediate Zr–Cu icosahedral clusters which is structurally restricted process and precipitation of crystalline phases as thermodynamically favorable process.
Starting Page	1107
Ending Page	1112
Page Count	6
File Format	PDF
ISSN	09722815
Journal	Transactions of the Indian Institute of Metals
Volume Number	68
Issue Number	6
e-ISSN	09751645
Language	English
Publisher	Springer India
Publisher Date	2015-09-10
Publisher Place	New Delhi
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Icosahedral clusters Cluster energetics Crystallization Metallic Materials Materials Science Tribology, Corrosion and Coatings
Content Type	Text
Resource Type	Article
Subject	Metals and Alloys

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