|
|||||
|
|
| La替代Mg对快淬纳米晶/非晶Mg_2Ni型合金贮氢动力学的影响 | |
| 引用本文： | 张羊换,李霞,张国芳,侯忠辉,胡锋,王煜.La替代Mg对快淬纳米晶/非晶Mg_2Ni型合金贮氢动力学的影响[J].功能材料,2011,42(10). |
| 作者姓名： | 张羊换 李霞 张国芳 侯忠辉 胡锋 王煜 |
| 作者单位： | 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 |
| 基金项目： | 国家自然科学基金资助项目(50871050,50961009); 内蒙古自治区自然科学基金重大资助项目(2010ZD05) |
| 摘 要： | 为了改善Mg2Ni型合金气态及电化学贮氢动力学性能,用La部分替代合金中的Ni,用快淬技术制备了Mg2-xLaxNi（x=0、0.2、0.4、0.6）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装置测试了合金的气态贮氢动力学性能,用程控电池测试仪测试了合金的电化学贮氢动力学。结果发现快淬二元Mg2Ni合金具有典型的纳米晶结构,而快淬La替代合金明显地显示具有非晶结构,表明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≤0.2时,La替代Mg不改变合金的主相Mg2Ni,但出现少量的LaMg3及La2Mg17相。而当La替代量x=0.4时,合金的主相改变为（La,Mg）Ni3＋LaMg3。合金的气态及电化学吸放氢动力学对La含量及快淬工艺敏感,La替代使合金的吸氢动力学降低,但适量的La替代Mg可以明显改善合金的放氢动力学及高倍率放电能力。La替代对合金贮氢动力学性能的影响与合金的制备工艺密切相关,表明合金的组织结构是影响其贮氢动力学的重要因素。 |
| 关 键 词： | Mg2Ni型合金 La替代Mg 微观结构 贮氢动力学 |
Influence of substituting Mg with La on hydrogen storage kinetics of as-quenched nanocrystalline/amorphous Mg_2Ni-type alloys |
|
| ZHANG Yang-huan,LI Xia,ZHANG Guo-fang,HOU Zhong-hui,HU Feng,WANG Yu.Influence of substituting Mg with La on hydrogen storage kinetics of as-quenched nanocrystalline/amorphous Mg_2Ni-type alloys[J].Journal of Functional Materials,2011,42(10). | |
| Authors: | ZHANG Yang-huan LI Xia ZHANG Guo-fang HOU Zhong-hui HU Feng WANG Yu |
| Affiliation: | ZHANG Yang-huan1,2,LI Xia1,ZHANG Guo-fang1,HOU Zhong-hui2,HU Feng2,WANG Yu1(1.Department of Functional Material Research,Central Iron and Steel Research Institute,Beijing 100081,China,2.Elected State Key Laboratory,Inner Mongolia University of Science and Technology,Baotou 014010,China) |
| Abstract: | In order to improve the gaseous and electrochemical hydrogen storage kinetics of the Mg2Ni-type alloys,Mg in the alloy was partially substituted by element La,and rapid quenching technology was used for the preparation of the Mg2-xLaxNi(x=0,0.2,0.4,0.6) alloys.The structures of the as-cast and quenched alloys were characterized by XRD,SEM and HRTEM.The gaseous hydrogen storage kinetics of the alloys was measured using an automatically controlled Sieverts apparatus.The electrochemical hydrogen storage kineti... |
| Keywords: | Mg2Ni-type alloy substituting Mg with La structure hydrogen storage kinetics |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |