Local structure in hydrogenated Ti-Zr-Ni quasicrystals and approximants

被引：17

作者：

Sadoc, A

Majzoub, EH

Huett, VT

Kelton, KF

机构：

[1] Univ Cergy Pontoise, Lab Phys Mat & Surfaces, F-95031 Cergy Pontoise, France

[2] CEA, CNRS, Lab Utilisat Rayonnement Electromagnet, MENESR, F-91898 Orsay, France

[3] Sandia Natl Labs, Livermore, CA 95441 USA

[4] Washington Univ, Dept Phys, St Louis, MO 63130 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2003年 / 356卷

关键词：

hydrogen storage materials; liquid quenching; EXAFS; synchrotron radiation; X-ray spectroscopies;

D O I：

10.1016/S0925-8388(02)01218-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have investigated the influence of hydrogen on the local structure of Ti-Zr-Ni alloys, icosahedral quasicrystals or crystalline approximants, using extended X-ray absorption fine structure (EXAFS). With an increasing hydrogen-to-metal ratio from 0 to 1.7, a general increase of all the mean first distances was found except for the Zr-Ni (Ni-Zr) ones. The perturbation of the (quasi)lattice, induced by hydrogenation, is a maximum around the Ti and Zr atoms, which suggests that hydrogen atoms sit preferentially near titanium and zirconium atoms. (C) 2002 Elsevier B.V. All rights reserved.

引用

页码：96 / 99

页数：4

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