| Co替代Ni改善纳米晶和非晶Mg2Ni型合金的贮氢动力学 |
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| 引用本文： | 张羊换,宋春红,任慧平,李志刚,胡锋,赵栋梁.Co替代Ni改善纳米晶和非晶Mg2Ni型合金的贮氢动力学[J].中国有色金属学会会刊,2011,21(9):2002-2009. |
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| 作者姓名： | 张羊换 宋春红 任慧平 李志刚 胡锋 赵栋梁 |
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| 作者单位： | 钢铁研究总院功能材料研究所;内蒙古科技大学国家重点实验室培育基地; |
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| 基金项目： | Projects(50871050,50961009)supported by the National Natural Science Foundation of China; Projects(2010ZD05,2011ZD10)supported by Natural Science Foundation of Inner Mongolia,China; Project(NJzy08071)supported by High Education Science Research Project of Inner Mongolia,China |
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| 摘 要： | 为了改善Mg2Ni型合金的贮氢动力学性能,用Co部分替代合金中的Ni,用快淬技术制备了Mg2Ni1？xCox（x=0,0.1,0.2,0.3,0.4）贮氢合金。用XRD、HRTEM表征了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定了合金薄带的电化学贮氢动力学。结果表明：Co替代Ni提高了Mg2Ni型合金的非晶形成能力,合金的非晶化程度随着Co含量的增加而增加。此外,Co替代Ni显著地改善了合金的贮氢动力学,当Co含量从0增加到0.4时,快淬态（15m/s）合金在5min内的吸氢饱和率从81.2%增加到84.9%,20min的放氢率从17.60%增加到64.79%,氢扩散系数从1.07×10-11cm2/s增加到2.79×10？11cm2/s,极限电流密度从46.7mA/g增加到191.7mA/g。
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| 关 键 词： | Mg2Ni型合金 Co替代Ni 快淬 贮氢动力学 |
| 收稿时间： | 15 September 2010 |
Enhanced hydrogen storage kinetics of nanocrystalline and amorphous Mg_2N-type alloy by substituting Ni with Co |
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| ZHANG Yang-huan,SONG Chun-hong,REN Hui-ping,LI Zhi-gang,HU Feng,ZHAO Dong-liang.Enhanced hydrogen storage kinetics of nanocrystalline and amorphous Mg_2N-type alloy by substituting Ni with Co[J].Transactions of Nonferrous Metals Society of China,2011,21(9):2002-2009. |
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| Authors: | ZHANG Yang-huan SONG Chun-hong REN Hui-ping LI Zhi-gang HU Feng ZHAO Dong-liang |
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| Affiliation: | ZHANG Yang-huan1,2,SONG Chun-hong1,REN Hui-ping2,LI Zhi-gang1,HU Feng1,ZHAO Dong-liang1 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 |
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| Abstract: | In order to improve the hydrogen storage kinetics of the Mg2Ni-type alloys, Ni in the alloy was partially substituted with element Co. The Mg2Ni-type Mg2Ni1-xCox (x=0, 0.1, 0.2, 0.3, 0.4) alloys were fabricated by melt-spinning technique. The structures of the as-spun alloys were characterized by XRD and TEM. The gaseous and electrochemical hydrogen storage kinetics of the alloys was measured. The results show that the substitution of Co for Ni notably enhances the glass forming ability of the Mg2Ni-type al... |
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| Keywords: | Mg2Ni-type alloy substituting Ni with Co melt spinning hydrogen storage kinetics |
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