董小平,庞艳荣,王青,陈家熠,王翠表

• 1:河北大学质量技术监督学院

摘要(Abstract)：

为了改善镧镁镍贮氢合金的循环稳定性,以La0.78Mg0.22Ni3.70合金为研究对象探索放电等离子烧结适宜温度。采用扫描电镜(SEM)、X射线衍射(XRD)分析了合金的断口形貌及相结构,电池测试仪测试了合金的电化学性能。结果表明,合金的烧结过程含有膨胀—收缩阶段,收缩阶段相对较长。随烧结温度升高,合金收缩引起的位移增加,合金断口先致密后蓬松,含有LaNi5、(La,Mg)2Ni7主相以及LaNi2.28残余相。与其它温度烧结合金相比,950℃烧结合金具有较高的放电容量和循环稳定性。

关键词(KeyWords)： 放电等离子烧结;镧镁镍贮氢合金;相结构;电化学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51371094);; 河北省高等学校科学研究计划(Z2012168);; 保定市科学计划研究与发展指导计划项目(12ZG018)

作者(Author): 董小平,庞艳荣,王青,陈家熠,王翠表

DOI: 10.13289/j.issn.1009-6264.2014.05.004

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