Fractal atomic-level percolation in metallic glasses
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Authors
Chen, David Z.
Shi, Crystal Y.
An, Qi
Zeng, Qiaoshi
Mao, Wendy L.
Goddard III, William A.
Greer, Julia R.
Issue Date
2015
Type
Citation
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Abstract
Metallic glasses are metallic alloys that exhibit exotic material properties. They may have fractal structures at the atomic level, but a physical mechanism for their organization without ordering has not been identified. We demonstrated a crossover between fractal short-range (<2 atomic diameters) and homogeneous long-range structures using in situ x-ray diffraction, tomography, and molecular dynamics simulations. A specific class of fractal, the percolation cluster, explains the structural details for several metallic-glass compositions. We postulate that atoms percolate in the liquid phase and that the percolating cluster becomes rigid at the glass transition temperature.
Description
Citation
Publisher
American Association for the Advancement of Science
License
In Copyright
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PubMed ID
ISSN
0036-8075