Local structure of binary alloys Zr70Pd30

被引：1
|
作者：
Menushenkov, A. P.
Kashurnikova, O. V.
Chernikov, R. V.
Panova, G. Kh.
Shikov, A. A.
机构：
[1] Moscow Engn Phys Inst, Moscow 115409, Russia
[2] Russian Res Ctr, Kurchatov Inst, Moscow 123182, Russia
来源：
CRYSTALLOGRAPHY REPORTS | 2007年 / 52卷 / 06期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1134/S1063774507060168
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The rearrangements of the local environment of zirconium and palladium atoms in the binary alloy Zr70Pd30 upon the transformation from the crystalline to the quasicrystalline and amorphous states were studied by extended X-ray absorption fine structure (EXAFS) analysis. In the quasicrystalline phase, the icosahedral environment was found to be formed only around the zirconium ions because of shifts of both the palladium and zirconium atoms to the center of the cluster; in addition, the structure of the icosahedral clusters is distorted. The transformation from the crystalline to the quasicrystalline phase is accompanied by the atomic rearrangement in the immediate environment of palladium, thus resulting in the partial displacement of palladium by zirconium. In the amorphous phase, the icosahedral short-range order is not observed. A model for the description of the structure of the quasicrystalline phase of Zr70Pd30 is proposed.
引用
收藏
页码：1030 / 1035
页数：6
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