Correlation of Atomic Cluster Symmetry and Glass-Forming Ability of Metallic Glass
Journal Article
·
· Physical Review Letters
- Department of Physics and Astronomy and Curriculum in Applied and Materials Sciences, University of North Carolina, Chapel Hill, North Carolina 27599-3255 (United States)
- Institute of Physics, Chinese Academy of Sciences, Beijing 100080 (China)
Local structures play a crucial role in glass formation and properties. In addition to topological short-range order, the geometric property of site symmetry is another important but less known characteristic of local structures. It is shown that the observed sharp increase of glass forming ability of Ce{sub 70-x}Al{sub 10}Cu{sub 20}Co{sub x} upon Co addition is correlated with a dramatic increase of Al site symmetry, as reflected by decreasing quadrupole frequency measured by {sup 27}Al NMR. The result is consistent with the structure model of Al-centered icosahedral clusters as the predominant structural building blocks.
- OSTI ID:
- 21028184
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 99; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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