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Evidence of icosahedral short-range order in Zr70Cu30 and Zr70Cu29Pd1 metallic glasses

被引：115
作者：
Saksl, K
Franz, H
Jóvári, P
Klementiev, K
Welter, E
Ehnes, A
Saida, J
Inoue, A
Jiang, JZ [1 ]
机构：
[1] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Peoples R China
[2] Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark
[3] DESY, HASYLAB, D-22607 Hamburg, Germany
[4] Tohoku Univ, Interdisciplinary Res Ctr, Sendai, Miyagi 9808578, Japan
[5] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
来源：
APPLIED PHYSICS LETTERS | 2003年 / 83卷 / 19期
关键词：
D O I：
10.1063/1.1626266
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Change in local atomic environment during crystallization of Zr-based glassy alloys was studied by extended x-ray absorption fine structure (EXAFS) spectroscopy. The formation of icosahedral quasicrystalline phase followed by crystallization of tetragonal CuZr2 has been observed in the Zr70Cu29Pd1 glassy alloy during annealing up to 850 K. On the other hand, the binary Zr70Cu30 alloy shows a single glassy to crystalline CuZr2 phase transformation. The local atomic environment of as-quenched Zr70Cu30 alloy is matched to an icosahedral local atomic configuration, which is similar to that of the as-quenched Zr70Cu29Pd1 alloy and the alloy annealed at 593 K containing icosahedral phase. Considering that the supercooled liquid region appears prior to crystallization in the Zr70Cu30 glassy alloy, the observed results support the theory claiming a strong correlation between the existence of local icosahedral short-range order and stability of the supercooled liquid state. (C) 2003 American Institute of Physics.
引用
收藏
页码：3924 / 3926
页数：3
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