Microstructure and crystallization in Cu50Zr45Al5 metallic glass

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作者：
Ou, X. [1 ]
Roseker, W. [2 ]
Saksl, K. [2 ]
Franz, H. [2 ]
Gerward, L. [3 ]
Xu, X. [1 ]
Zhang, G.Q. [1 ,4 ]
Wang, L.N. [4 ]
Liu, J.F. [1 ]
Jiang, J.Z. [1 ]
机构：
[1] Laboratory of New-Structured Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
[2] HASYLAB am DESY, Notkestrasse 85, D-22603 Hamburg, Germany
[3] Department of Physics, Technical University of Denmark, Building 307, DK-2800 Lyngby, Denmark
[4] Center for Analysis, Zhejiang Sci-Tech University, Hangzhou, 310018, China
来源：
| 1600年 / Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom卷 / 441期
关键词：
Microstructure and crystallization of a Cu50Zr45Al5 metallic glass have been investigated by differential scanning calorimetry; X-ray diffraction and extended X-ray absorption fine structure (EXAFS) using synchrotron radiation. The width of the supercooled region is ΔTx = Tx - Tg = 67 K; where Tx and Tg are the crystallization and the glass transition temperature; respectively; the reduced glass transition temperature is Trg = Tg/Tl = 0.65; where Tl is the liquid temperature; and γ = Tx/(Tg + Tl) = 0.41. After crystallization of the as-prepared Cu50Zr45Al5 metallic glass; crystalline phases are identified as tetragonal CuZr2 and orthorhombic Cu10Zr7. The local atomic structures deduced from EXAFS reveal that Zr atoms in the as-prepared Cu50Zr45Al5 metallic glass are surrounded by about 5 Cu atoms at a distance of 2.70 Å and about 5 Zr atoms at 3.14 Å. © 2006 Elsevier B.V. All rights reserved;
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