李敏,杨丽颖,董小平,陈亚芳,李旭,张雷

• 1:河北大学电子信息工程学院
• 2:河北大学光伏技术虚拟仿真实验教学中心
• 3:河北大学质量技术监督学院

摘要(Abstract)：

采用SEM与XRD分析了Mg_(2.1)Ni与Mg_(1.6)La_(0.5)Ni合金的显微组织与相结构,用Sievert法测试了合金的活化性能以及吸放氢动力学。结果表明:Mg_(2.1)Ni合金的室温组织为脊椎状的Mg_2Ni相和层片状Mg_2Ni/Mg共晶组织,而Mg_(1.6)La_(0.5)Ni合金组织为块状La2Mg17相、长条状LaMg_3相镶嵌于Mg_2Ni基体相中;合金的吸氢活化性能与成分有关,Mg_(2.1)Ni合金的活化性能相对较差,而Mg_(1.6)La_(0.5)Ni合金的活化性能优异;合金的吸放氢动力学与La加入有关,Mg_(1.6)La_(0.5)Ni合金的吸放氢动力学优于Mg_(2.1)Ni合金,这归因于La加入使合金组织疏松、较多的晶界/相界、以及具有催化效应的La_4H_(12.19)相出现,但La_4H_(12.19)相具有较高的热稳定性,这降低合金氢化物的放氢率。

关键词(KeyWords)： Mg-Ni合金;La元素;微观组织结构;吸放氢动力学

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51371094);; 河北省自然科学基金(E2018201235,E2014201120,E2015201203);; 河北大学实验室开放项目基金(sy201676,201650)

作者(Author): 李敏,杨丽颖,董小平,陈亚芳,李旭,张雷

DOI: 10.13289/j.issn.1009-6264.2017-0484

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