Improvement of hydrogen storage properties of melt-spun Mg-Ni-RE alloys by nanocrystallization

被引：99

作者：

Tanaka, K ^{[1
]}

Kanda, Y

Furuhashi, M

Saito, K

Kuroda, K

Saka, H

机构：

[1] Nagoya Inst Technol, Dept Mat Sci & Engn, Showa Ku, Nagoya, Aichi 466, Japan

[2] Nagoya Univ, Dept Quantum Engn, Nagoya, Aichi 46401, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1999年 / 293卷

关键词：

Mg-Ni-RE alloys; melt-spinning; nanocrystallization; hydrogen absorption rate; pressure-composition isotherm;

D O I：

10.1016/S0925-8388(99)00477-6

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 hydrogen absorbing rates and pressure-composition isotherms (PCT) are measured on Mg-Ni and Mg-Ni-RE (RE=La, Nd) alloys which have been amorphized by melt-spinning and crystallized to form nanocrystalline structures. The microstructures of these alloys as examined by X-ray diffraction and transmission electron microscopy consist of mixtures of crystalline grains of major Mg and Mg2Ni phases, together with a minor La2Mg17 or NdMg12 phase, of 50-100 nm in diameter. These nanocrystallized alloys, particularly of the Mg-Ni-RE systems, exhibit excellent hydrogen absorbing kinetics and PCT characteristics in comparison with those of the corresponding as-cast alloys with coarse eutectic structures. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：521 / 525

页数：5