快淬纳米晶Mg2Ni型合金的贮氢性能

功能材料, 2010, 41(4): 581-586.

快淬纳米晶Mg2Ni型合金的贮氢性能

张羊换 ^1, , 赵栋梁 ^2, , 郭世海 ^3, , 张国芳 ^4, , 王青春 ^5, , 王新林 ^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,材料学院,内蒙古,包头,014010

2.钢铁研究总院,功能材料研究所,北京,100081

3.钢铁研究总院,功能材料研究所,北京,100081

4.内蒙古科技大学,材料学院,内蒙古,包头,014010

5.内蒙古科技大学,材料学院,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: 国家高技术研究发展计划(863计划)资助项目(2007AA036Z227) 国家自然科学基金资助项目(50871050;50701011) 内蒙古自然科学基金重点资助项目(200711020703) 内蒙古高等教育科学研究资助项目(NJzy08071)

关键词： Mg2Ni型合金 , 快淬 , Cu替代Ni , 微观结构 , 贮氢性能

Hydrogen storage characteristics of melt spun nanocrystalline Mg2Ni-type alloys

为了改善Mg2Ni合金的贮氢性能,用Cu部分替代合金中的Ni,用快淬工艺制备了纳米晶Mg2Ni型Mg20Ni10-xCux(x=0、1、2、3、4)合金.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放氢动力学性能;用程控电池测试仪测试了合金电极的电化学贮氢性能.结果表明,所有的快淬态合金具有纳米晶结构,Cu替代Ni及快淬处理没有改变合金的Mg2Ni型主相.合金的吸放氢容量及动力学随淬速的增加而增加.此外,快淬处理显著地提高了合金的电化学贮氢容量,但使循环稳定性下降.

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