Hydrogen-storage properties and structure characterization of melt-spun and annealed Mg-Ni-Nd alloy

被引：32
|
作者：
Yin, JT
Tanaka, K [1 ]
Tanaka, N
机构：
[1] Nagoya Inst Technol, Dept Mat Sci & Engn, Nagoya, Aichi 4668555, Japan
[2] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4640814, Japan
来源：
MATERIALS TRANSACTIONS | 2002年 / 43卷 / 03期
关键词：
hydrogen storage; magnesium-nickel-neodymium alloy; melt-spinning; nanocomposite structure; hydriding/dehydriding kinetics; catalyst; high-resolution transmission electron microscopy;
D O I：
10.2320/matertrans.43.417
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The hydriding/dehydriding characteristics of a Mg-rich Mg-Ni-Nd alloy produced by melt-spinning and subsequent annealing have been investigated, This alloy absorbs similar to 4.7 mass% hydrogen (H/Msimilar to 1.5) quickly between 423 and 573 K and wholly desorbs it at moderate speeds above 453 K. Transmission electron microscope observations and selected-area electron diffraction analyses of this alloy before and after hydriding demonstrate that it consists of multiple phases Of Mg2Ni and Nd-hydride precipitated uniformly in a nano-structured Mg matrix. The fast reaction kinetics is caused by an inter-play between a catalytic action of the Nd-hydrides and the surrounding nano-sized Mg grains which quickly store or evolve hydrogen across the interfaces.
引用
收藏
页码：417 / 420
页数：4
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