Segregation control for the preparation of rare earth based hydrogen storage alloys

被引：3
|
作者：
Hsu, SE [1 ]
Yeh, MT [1 ]
Hsu, IC [1 ]
Wang, JY [1 ]
Beibutian, V [1 ]
机构：
[1] HYTEC Co Ltd, RID Ctr, Taipei, Taiwan
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 1999年 / 293卷
关键词：
segregation control; rare earth based hydrogen storage alloys; spontaneous reaction synthesis; spin-off quenching;
D O I：
10.1016/S0925-8388(99)00426-0
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：
This study investigated the effect of a segregation control process on micro-structural change in the rare earth based hydrogen storage alloy. Micro-structural analysis correlating with P-C-I data revealed that segregation in rare earth based intermetallics after conventional solidification was crucial. In order to minimize the effect of segregation, anew process, SMQ, in which the spontaneous reaction synthesis (SRS) is combined with vacuum induction melting (VIM) and: immediately followed by spin-off quenching (SOQ) was developed in this work. Examination of micro-structural changes showed that segregation was obviously controlled by the new process. As a result, hydrogen absorption capacity as well as the electrochemical characteristics for MH electrode was improved. (C) 1999 Published by Elsevier Science S.A. All rights reserved.
引用
收藏
页码：658 / 662
页数：5
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