快淬Mg2Ni型合金的结构及贮氢动力学

被引:3
作者
张羊换 [1 ,2 ]
张国芳 [1 ,2 ]
李霞 [1 ,2 ]
侯忠辉 [2 ]
任慧平 [2 ]
赵栋梁 [1 ]
机构
[1] 钢铁研究总院功能材料研究所
[2] 内蒙古科技大学省部共建国家重点实验室培育基地
关键词
Mg2Ni型合金; 快淬; 结构; 贮氢动力学;
D O I
暂无
中图分类号
TG139.7 [];
学科分类号
080502 ;
摘要
用快淬技术制备Mg2-xLaxNi(x=0,0.2,0.4,0.6)贮氢合金,用XRD,SEM和HRTEM分析合金的微观组织结构;测试合金的气态及电化学贮氢动力学。结果表明:快淬二元Mg2Ni合金具有典型的纳米晶结构,而快淬La替代合金明显地具有非晶结构,La替代Mg提高Mg2Ni型合金的非晶形成能力。La替代Mg明显地改变Mg2Ni型合金的相组成,当x=0.4时,合金的主相改变为(La,Mg)Ni3+LaMg3。快淬及La替代明显影响合金的气态及电化学贮氢动力学,La替代使合金的吸氢动力学先降低后增加,但使合金的气态脱氢及电化学贮氢动力学先增加后降低。快淬对合金气态及电化学贮氢动力学的影响与合金的成分相关,对于La0.4合金,合金的气态吸氢动力学随淬速的增加先增加后减小,其放氢动力学随淬速的增加而增加。
引用
收藏
页码:2101 / 2107
页数:7
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