| 磁热处理对La-Mg-Ni-Cu合金相结构与电化学性能的影响 |
| |
| 引用本文： | 赵显久,李 谦,刘 静,周国治,林根文.磁热处理对La-Mg-Ni-Cu合金相结构与电化学性能的影响[J].稀有金属材料与工程,2009,38(5):857-861. |
| |
| 作者姓名： | 赵显久 李 谦 刘 静 周国治 林根文 |
| |
| 作者单位： | 1. 上海大学,上海,200072
2. 上海大学,上海,200072;北京科技大学,北京,100083 |
| |
| 基金项目： | 上海市科委西部开发科技合作项目，上海市青年科技启明星计划，全国博士学位论文作者专项资助项目 |
| |
| 摘 要： | 考察了La0.67Mg0.33Ni2.5Cu0.5合金分别在铸态、热处理后及磁热处理后3种状态下的相结构及其电化学性能.并通过XRD分析合金物相组成及SEM观察合金组织形貌,研究了Cu部分取代Ni以及有无外加磁场下热处理对合金相结构与电化学性能的作用规律.结果表明,La0.67Mg0.33Ni2.5Cu0.5铸态合金经过50次循环后,放电容量保持率从64.40%提高到72.44%;经磁热处理的La0.67Mg0.33Ni2.5Cu0.5合金最大放电容量为328.2 mAh/g,较常规热处理合金的容量提高了31.51%, 50次循环后的容量保持率为75.89%.其放电平台更为宽广且平坦;极限电流显著增大,氢在合金体相中的扩散速度加快.
|
| 关 键 词： | 贮氢合金 AB3型电极合金 磁热处理 电化学性能 |
| 收稿时间： | 2008/5/20 0:00:00 |
Influence of Magnetic-Heat Treatment on Phase Structure and Electrochemical Properties of La-Mg-Ni-Cu Alloys |
| |
| Zhao Xianjiu,Li Qian,Liu Jing,Zhou Guozhi and Lin Genwen.Influence of Magnetic-Heat Treatment on Phase Structure and Electrochemical Properties of La-Mg-Ni-Cu Alloys[J].Rare Metal Materials and Engineering,2009,38(5):857-861. |
| |
| Authors: | Zhao Xianjiu Li Qian Liu Jing Zhou Guozhi and Lin Genwen |
| |
| Affiliation: | 1. Shanghai University;Shanghai 200072;China;2. University of Science and Technology Beijing;Beijing 100083;China |
| |
| Abstract: | The phase structure and electrochemical properties of La0.67Mg0.33Ni2.5Cu0.5 alloys as cast and treated by heat treatment and magnetic-heat treatment were studied in this paper. The influence of the heat treatment and magnetic-heat treatment as well as Ni substituted partly with Cu on the phase structure and electrochemical properties of La-Mg-Ni-Cu alloys were investigated by XRD and SEM analysis. The results show that the retention of discharge capacity of as-cast La0.67Mg0.33Ni2.5Cu0.5 alloy is increased... |
| |
| Keywords: | hydrogen storage alloys AB3-type electrode alloy magnetic-heat treatment electrochemical properties |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《稀有金属材料与工程》浏览原始摘要信息 |
|
点击此处可从《稀有金属材料与工程》下载全文 |
