Glass Transition by Gelation in a Phase Separating Binary Alloy
Name
Baumer-2013-Glass Transition by Gelation.pdf
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1.63 MB
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Author(s)
Baumer, Richard E.
Demkowicz, Michael J.
Date Issued
April 2013
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Baumer, R. E., and M. J. Demkowicz. 2013 Glass Transition by Gelation in a Phase Separating Binary Alloy. Physical Review Letters 110, 145502 (2013) [5 pages]. © 2013 American Physical Society.
Version
Final published version
Abstract
We use molecular dynamics simulations to show that glass transition in a model phase separating amorphous alloy, Cu50Nb50, occurs by gelation. At the glass transition, a mechanically stiff, percolating network of atoms with icosahedral local packing forms at the interfaces between compositionally enriched regions. This low-energy network halts coarsening of the phase-separated structure and imparts shear resistance. These features of glass transition are remarkably similar to gelation processes in polymeric and colloidal gels.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.110.145502
