快淬工艺对低钴AB5型贮氢合金电化学性能的影响

功能材料, 2005, 36(12): 1895-1898.

快淬工艺对低钴AB5型贮氢合金电化学性能的影响

王国清 ^1, , 张羊换 ^2, , 赵栋梁 ^3, , 董小平 ^4, , 郭世海 ^5, , 王新林 ^6,

1.钢铁研究总院,功能材料研究所,北京,100081

2.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

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.钢铁研究总院,功能材料研究所,北京,100081

6.钢铁研究总院,功能材料研究所,北京,100081

基金项目: 蒙古自然科学基金(200408020706) 中国科学院资助项目(50131040)

关键词：快淬 , 低钴 , La替代Mm , 电化学性能 , 微观结构

The effect of rapid quenching on the electrochemical performances of low-Co AB5-type hydrogen storage alloys

研究了快淬工艺对稀土基低钴AB5型LaxMm1-x(NiMnSiAlFe)4.7Co0.2(x=0、1)贮氢合金的电化学性能及其微观结构的影响.研究结果表明,快淬改善了两种合金的循环稳定性,其主要原因是快淬使合金的晶胞体积增大,且使合金的晶粒细化;快淬对La含量x=0合金的循环寿命的增加幅度尤其明显,主要是因为快淬使该合金的晶粒更为细小.La替代Mm使合金的放电容量提高,其原因是La替代Mm抑制了第二相Ce2Ni7相的形成,并使合金的晶胞体积增大.

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快淬工艺对低钴AB5型贮氢合金电化学性能的影响

The effect of rapid quenching on the electrochemical performances of low-Co AB5-type hydrogen storage alloys

参考文献