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Microscopic description of strain‐reducing chemical bonding self‐organizations in non‐crystalline alloys
Author(s) -
Lucovsky Gerald,
Phillips James C.
Publication year - 2009
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200881311
Subject(s) - percolation (cognitive psychology) , enthalpy , materials science , alloy , strain (injury) , glass transition , percolation theory , condensed matter physics , composite material , thermodynamics , chemistry , polymer , conductivity , physics , medicine , neuroscience , biology
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)