期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 23, 期 7, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/23/7/075402
关键词
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资金
- National Natural Science Foundation of China [51071141, 51010006, 50701038, 60776014, 60876002, 10804096, 50920105101, 10979002]
- Returned Overseas Scholars Fund
- Qianjiang Program
- Zhejiang University-Helmholtz cooperation fund
- Ministry of Education of China
- Department of Science and Technology of Zhejiang province
- Zhejiang University
Inhomogeneities in two CuZr-based bulk metallic glasses (BMGs) were studied by using synchrotron radiation x-ray scattering techniques. (Cu4.5/5.5Ag1/5.5)(46)Zr46Al8 BMG was found to be more inhomogeneous than Cu46Zr46Al8 BMG on the small length scale, where Cu and Ag atoms form enriched zones. Such heterogeneities are locally favorable for forming close-packed icosahedron-like clusters in three-dimensional space, greatly promoting the glass forming ability of this alloy. Upon annealing near the T-g temperature, the heterogeneities were reduced initially at low temperature and short time annealing, then regenerated again for temperature increase and time extension. The average environment around Zr atoms almost does not change. However, the heterogeneity increases for Cu, Zr and Ag atoms once nanocrystallization happens.
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