期刊
SCIENCE
卷 349, 期 6254, 页码 1306-1310出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aab1233
关键词
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资金
- U.S. Department of Energy Office of Basic Energy Sciences (DOE-BES)
- NASA's Space Technology Research Grants Program (Early Career Faculty grants)
- NSF [EAR-1055454, MRI-1126249]
- DOE-BES [DE-FG02-99ER45775, DE-AC02-06CH11357]
- National Natural Science Foundation of China [U1530402]
- DOE's National Nuclear Security Administration (NNSA) [DE-NA0001974]
- NNSA Predictive Science Academic Alliance Program at Caltech [DE-FC52-08NA28613]
- NSF Center for Science and Engineering of Materials computer cluster [DMR-0520565]
- Defense Advanced Research Projects Agency-Army Research Office [W31P4Q-13-1-0010]
- NSF Graduate Research Fellowship [DGE-1144469]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1436985] Funding Source: National Science Foundation
- Directorate For Geosciences
- Division Of Earth Sciences [1055454] Funding Source: National Science Foundation
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.
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