熔盐保护熔炼法制备La2Mg17合金及其储氢性能

稀有金属材料与工程, 2009, 38(5): 924-929.

熔盐保护熔炼法制备La2Mg17合金及其储氢性能

刘静 ^1, , 赵显久 ^2, , 张旭 ^3, , 李谦 ^4, , 林根文 ^5, , 周国治 ^6,

1.上海大学,上海,200072

2.上海大学,上海,200072

3.上海大学,上海,200072

4.上海大学,上海,200072

5.上海大学,上海,200072

6.上海大学,上海,200072;北京科技大学,北京,100083

基金项目: 全国博士学位论文作者专项资助项目(200746) 上海大学研究生创新基金上海市青年科技启明星计划(06QA14021) 上海市基础研究重点项目(06JC14031)

关键词：熔盐保护熔炼法 , 储氢合金 , La2Mg17 , 性能

Hydrogen Storage Properties of La2Mg17 Alloy Prepared by a Smelting Method with Protection by Molten Salt

采用熔盐保护熔炼法(SMPMS)成功制备了La2Mg17储氢合金.SEM和EDS研究发现,熔炼时液相在凝固过程中形成微观成分不均匀的非平衡组织.通过PCT性能测试发现,合金在523～623 K时可逆吸放氢量大于4.3%(质量分数, 下同).动力学分析结果表明,合金在473～623 K时具备良好的氢化动力学性能,并且在523 K时出现氢化速率极大值(25 s内吸氢3.2%).丰富的表面裂纹改善了合金的储放氢性能.

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材料期刊网

熔盐保护熔炼法制备La2Mg17合金及其储氢性能

Hydrogen Storage Properties of La2Mg17 Alloy Prepared by a Smelting Method with Protection by Molten Salt

参考文献