快淬纳米晶Mg2Ni1-xCux(x=0～0.4)合金的贮氢动力学

功能材料, 2011, 42(2): 376-380.

快淬纳米晶Mg2Ni1-xCux(x=0～0.4)合金的贮氢动力学

张羊换 ^1, , 任慧平 ^2, , 祁焱 ^3, , 郭世海 ^4, , 李霞 ^5, , 赵栋梁 ^6,

1.钢铁研究总院功能材料研究所,北京,100081;内蒙古科技大学省部共建国家重点实验室培育基地,内蒙古包头,014010

2.内蒙古科技大学省部共建国家重点实验室培育基地,内蒙古包头,014010

3.钢铁研究总院功能材料研究所,北京,100081

4.钢铁研究总院功能材料研究所,北京,100081

5.钢铁研究总院功能材料研究所,北京,100081;内蒙古科技大学省部共建国家重点实验室培育基地,内蒙古包头,014010

6.钢铁研究总院功能材料研究所,北京,100081

基金项目: 国家自然科学基金资助项目(50871050;50701011) 国家高技术研究发展计划(863计划)资助项目(2007AA03Z227) 内蒙古高等教育科学研究资助项目(NJzy08071) 内蒙古自然科学基金重大资助项目(2010ZD05)

关键词： Mg2Ni型合金 , 快淬 , 微观结构 , 贮氢动力学

Hydrogen storage kinetics of nanocrystalline and Mg2Ni(1-x)Cux(x=0-0.4)alloys prepared by melt spinning

用快淬工艺制备了纳米晶Mg2Ni型Mg2Ni(1-x)Cux(x=0、0.1、0.2、0.3、0.4)合金,研究了快淬工艺对合金结构及贮氢动力学的影响.用XRD、SEM、HRTEM分析了铸态及快淬态合金的微观结构;用自动控制的Sieverts设备测试了合金的吸氢动力学性能,用程控电池测试仪测试了合金的高倍率放电性能(HRD),用电化学工作站测试了合金的交流阻抗谱(EIS)以及电位阶跃后的阳极电流-时间相应曲线,并计算了氢在合金中的扩散系数(D).结果发现,快淬态合金具有纳米晶结构,Cu替代Ni不改变合金的Mg2Ni型主相.快淬显著改善了合金的贮氢动力学,合金的吸放氢动力学及高倍率放电能力(HRD)均随淬速的增加而增加.

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