Co替代Ni对快淬纳米晶/非晶Mg2Ni型合金吸放氢动力学的影响

功能材料, 2010, 41(7): 1214-1218.

Co替代Ni对快淬纳米晶/非晶Mg2Ni型合金吸放氢动力学的影响

张羊换 ^1, , 赵栋梁 ^2, , 任慧平 ^3, , 郭世海 ^4, , 祁焱 ^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,材料与冶金学院,内蒙古,包头,014010

2.钢铁研究总院,功能材料研究所,北京,100081

3.内蒙古科技大学,材料与冶金学院,内蒙古,包头,014010

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

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(2006AA05Z132) 内蒙古自然科学基金重点资助项目(200711020703) 国家自然科学基金资助项目(50871050;50701011) 内蒙古高等教育科学研究资助项目(NJzy08071)

关键词： Mg2Ni型合金 , Co替代Ni , 快淬 , 微观结构 , 吸放氢动力学

Influence of substituting Ni with Co on hydriding and dehydriding kinetics of melt spun nanocrystalline/amorphous Mg2Ni-type alloy

为了改善Mg2Ni型合金的吸放氢动力学性能,用Co部分替代合金中的Ni.用快淬工艺制备了纳米晶和非晶Mg20Ni10-xCox(x=0,1,2,3,4)贮氢合金,分析了铸态及快淬态合金的微观结构,测试了合金的吸放氢动力学性能.研究了Co替代Ni及快淬工艺对合金吸放氢动力学性能的影响.结果表明,在快淬合金(x=0)中没有发现非晶相,但快淬合金(x=4)显示了纳米晶/非晶结构,表明Co替代Ni提高了Mg2Ni型合金的非晶形成能力.Co替代Ni不改变合金的Mg2Ni主相,但形成了第二相MgCo2.随Co替代量的增加,合金的吸氢量先增加而后减少,但其放氢量随Co替代量的增加而单调增加.

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