The structural and kinetic characteristics of Mg1.9Al0.1Ni alloy synthesized by mechanical alloying

被引：10
|
作者：
Li, Qian
Chou, Kuo-Chih
Xu, Kuang-Di
Lin, Qin
Jiang, Li-Jun
Zhan, Feng
机构：
[1] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200072, Peoples R China
[2] Univ Sci & Technol Beijing, Dept Chem Phys, Beijing 100083, Peoples R China
[3] Gen Res Inst NonFerrous Met, Res Ctr Energy Mat & Technol, Beijing 100088, Peoples R China
来源：
INTERMETALLICS | 2006年 / 14卷 / 12期
基金：
中国博士后科学基金;
关键词：
intermetallics; miscellaneous; hydrogen storage; mechanical alloying and milling; microstructure;
D O I：
10.1016/j.intermet.2005.11.014
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：
The structural and kinetic characteristics of the mechanically alloyed Mg1.9Al0.1Ni were investigated. It was found that Mg1.9Al0.1Ni can absorb/desorb about 3.55/3.44 mass% H at a high rate and it has a hexagonal crystal structure as Mg2Ni. The hydriding/dehydriding (H/D) rates in the two-phase (alpha-beta) region of Mg1.9Al0.1Ni were measured and studied at temperatures ranging from 553 to 623 K under an approximately isobaric condition. The obtained data of H/D rates indicated that hydrogen diffusion was the rate-controlling step through the hydride phase. A new model was successfully used to calculate the kinetic experimental results. It can be seen that theoretical calculation agrees well with experimental data. The corresponding activation energies are 47600 and 54500 J/mol H-2 for H/D processes, respectively. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1386 / 1390
页数：5
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