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快淬纳米晶/非晶Mg2-xLaxNi（x=0～0.6）合金的电化学贮氢性能
  • ISSN号：1002-185X
  • 期刊名称：《稀有金属材料与工程》
  • 时间：0
  • 分类：TM53[电气工程—电器]
  • 作者机构：[1]钢铁研究总院,北京100081, [2]内蒙古科技大学,内蒙古包头014010, [3]包头稀土研究院,内蒙古包头014010
  • 相关基金：国家自然科学基金项目（50871050,50961001）; 内蒙古自然科学基金重点项目（200711020703）; 内蒙古高等教育科学研究项目（NJzy08071）
作者： 张羊换[1,2], 马志鸿[1,3], 赵栋梁[1], 任慧平[2], 郭世海[1], 王新林[1]
关键词： Mg2Ni型合金, La替代Mg, 快淬, 电化学贮氢, Mg2Ni-type alloy, substituting La for Mg, rapid quenching, electrochemical hydrogen storage
中文摘要：

用铸造及快淬工艺制备Mg2Ni型Mg2-xLaxNi（x=0,0.2,0.4,0.6）贮氢合金。用XRD、SEM、HRTEM分析铸态及快淬态合金的微观结构。结果发现,在快淬无La合金中没有出现非晶相,但快淬含La合金显示了以非晶相为主的结构。用DSC研究快淬合金的热稳定性,表明La的含量及快淬对非晶相的晶化温度影响很小。电化学测试结果表明,铸态合金的放电容量随La含量的增加而增加,快淬态合金的放电容量随La含量的变化有极大值。La替代Mg显著地提高了铸态及快淬态合金的循环稳定性。

英文摘要：

Mg2Ni-type Mg2-xLaxNi （x=0,0.2,0.4,0.6） hydrogen storage alloys were prepared by casting and rapid quenching,respectively. The microstructures of the as-cast and quenched alloys were studied by XRD,SEM and HRTEM. Results show that no amorphous phase forms in the as-quenched La-free alloy,but the as-quenched alloys containing La hold a major amorphous phase. Thermal stability of the as-quenched alloys was studied by DSC,and the results show that La content and the quenching rate induce a negligible influence on the crystallization temperature of the amorphous phase. The electrochemical measurement shows that the discharge capacity of the as-cast alloys grows with the increase of La content,while the as-quenched alloys obtain the maximum discharge capacities with the variation of La content. The substitution of La for Mg markedly enhances the cycle stability of the as-cast and quenched alloys.

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期刊信息
  • 《稀有金属材料与工程》
  • 中国科技核心期刊
  • 主管单位:中国科学技术协会
  • 主办单位:中国有色金属学会 中国材料研究学会 西北有色金属研究院
  • 主编：张平祥
  • 地址：西安市51号信箱
  • 邮编：710016
  • 邮箱：RMME@c-nin.com
  • 电话：029-86231117
  • 国际标准刊号：ISSN：1002-185X
  • 国内统一刊号：ISSN：61-1154/TG
  • 邮发代号:52-172
  • 获奖情况:
  • 首届国家期刊奖,中国优秀期刊一等奖,中国有色金属工业优秀期刊1等奖
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  • 俄罗斯文摘杂志,美国化学文摘（网络版）,荷兰文摘与引文数据库,美国工程索引,美国科学引文索引（扩展库）,英国科学文摘数据库,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,中国北大核心期刊（2000版）
  • 被引量:24715