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Microscopic description of strain-reducing chemical bonding self-organizations in non-crystalline alloys

✍ Scribed by Lucovsky, Gerald ;Phillips, James C.

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
266 KB
Volume
206
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

Alloy compositions for a first transition (1) into, and a second transition (2) out of intermediate phases (IPs) have been identified (i) by Boolchand and co‐workers in bulk glasses, primarily by low values for the change in enthalpy, Δ__H__~nr~, for non‐reversible heat flow at the glass transition temperature, and (ii) by Lucovsky and coworkers in deposited thin film by combining spectrographic and electrical studies. This paper emphasizes chemical bonding self‐organizations that minimize macroscopic strain within IP windows, identifying necessary and sufficient conditions for IP windows to open, and to close. Percolation theory, competitive and synergistic double percolation, provide a framework for determining alloy compositions for the first and second transitions of IP windows in bulk glasses and thin films as well. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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