Hydriding properties of ordered-/disordered-Mg-based ternary Laves phase structures

被引：25

作者：

Hanada, N ^{[1
]}

Orimo, S ^{[1
]}

Fujii, H ^{[1
]}

机构：

[1] Hiroshima Univ, Fac Integrated Arts & Sci, Higashihiroshima 7398521, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2003年 / 356卷

关键词：

hydrogen storage material; mechanical alloying; X-ray diffraction; thermal analysis;

D O I：

10.1016/S0925-8388(03)00227-5

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：

Ternary Laves phase structures with compositions MgYNi4, MgCaNi4 and CaYNi4 were prepared, and the relationship between the structures and hydriding properties was studied in detail. Only in MgYNi4 are Mg and Y found to be ordered and a plateau pressure is clearly observed in the P-C isotherm during the dehydriding process. In MgCaNi4, however, Mg and Ca are disordered, and hydrogen content of MgCaNi4 is similar to30% larger than that of MgYNi4. Control of their order/disorder in Laves phase structures may provide the hydriding properties with higher hydrogen concentrations and flatter plateau regions. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：429 / 432

页数：4

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