| Thermodynamics of hydrogenation for Ti1-xZrxMnCr Laves phase alloys |
| M. Guo; E. Wu
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| 2008
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| 发表期刊 | Journal of Alloys and Compounds
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| ISSN | 0925-8388
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| 卷号 | 455期号:1-2页码:191-196 |
| 摘要 | The thermodynamics of hydrogenation for the Ti1-xZrxMnCr (x = 0, 0.1, 0.2, 0.32, 0.5, 0.7, 0.9, 1.0) alloys, which are characterized by the XRD Rietveld analysis as C14-type Laves phase, are evaluated by P-C isotherms measurements at different temperatures. Along with the increase of Zr content in the alloys, the pressure of the absorption/desorption plateau decreases monotonously; the average value of vertical bar Delta H vertical bar increases linearly, and the average value of vertical bar Delta S vertical bar decreases slightly; on the other hand, the hysteresis of hydrogenation reduces to a minimum at x = 0.32, and then rises again; the slope of the plateau increases first, then decreases, forming a maximum at x = 0.5. For the hydride formation of the Ti1-xZrxMnCr alloys, the values of vertical bar Delta H vertical bar and vertical bar Delta S vertical bar increase with the hydrogen concentration, except for that of the Ti0.8Zr0.2MnCr, where an opposite trend occurs, but all the vertical bar Delta H vertical bar values in the Ti1-xZrxMnCr-H-2 system are considerably lower than those in most Laves phase hydride systems. As combined effects of these trends, the Ti0.5Zr0.5MnCr alloy with the highest microstrain induced from the greatest mismatch of different atoms in the lattice, possesses the greatest plateau slope and the smallest variation width of vertical bar Delta H vertical bar for the hydride formation; on the other hand, the Ti0.68Zr0.32MnCr alloy exhibits the best hydrogen storage properties, with a reversible hydrogen capacity of 216 ml/g, and good plateau characteristics. (c) 2007 Published by Elsevier B.V. |
| 部门归属 | [guo, mulnei; wu, erdong] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;wu, e (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd,shenhe dist, shenyang 110016, peoples r china;ewu@imr.ac.cn
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| 关键词 | Hydrogen Storage Materials
Laves Phase
P-c Isotherms
Thermodynamics
Storage Properties
Timn2-based Alloys
Hydride Formation
Absorption
System
Equilibrium
Pressure
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| URL | 查看原文
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| WOS记录号 | WOS:000255447600038
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.imr.ac.cn/handle/321006/32783
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| 专题 | 中国科学院金属研究所
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推荐引用方式
GB/T 7714 |
M. Guo,E. Wu. Thermodynamics of hydrogenation for Ti1-xZrxMnCr Laves phase alloys[J]. Journal of Alloys and Compounds,2008,455(1-2):191-196.
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| APA |
M. Guo,&E. Wu.(2008).Thermodynamics of hydrogenation for Ti1-xZrxMnCr Laves phase alloys.Journal of Alloys and Compounds,455(1-2),191-196.
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| MLA |
M. Guo,et al."Thermodynamics of hydrogenation for Ti1-xZrxMnCr Laves phase alloys".Journal of Alloys and Compounds 455.1-2(2008):191-196.
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