Investigation on Crystal Structure and Thermodynamic Properties of La_(0.6)Nd_(0.4)Ni_(4.8)Mn_(0.2)Cu_x (x=0~0.4) Hydrogen Storage Alloys
La_(0.6)Nd_(0.4)Ni_(4.8)Mn_(0.2)Cu_x(x=0~0.4)贮氢合金的晶体结构及热力学性能
查看参考文献21篇
文摘
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The influences of Cu content on the crystal structure, thermodynamic properties and hydrogen storage performance of La_(0.6)Nd_(0.4)Ni_(4.8)Mn_(0.2)Cu_x (x=0, 0.1, 0.2, 0.3, 0.4) alloys were investigated and the relationships among the lattice parameter, plateau pressure and Gibbs free energy were analyzed. It was found that with the increase of the Cu content, the lattice parameter a shrunk and c expanded while the cell volume increased when x≤0.2 and then decreased when x≥0.3. The plateaw pressure linearly decreased with the increase of a. The Seitz radius decreased with the increase of the Cu content and showed a clear linear relationship with △S_d/△an_d an obvious hyperbolic relationship with △S_a/△H_a. |
其他语种文摘
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研究了Cu含量变化对La_(0.6)Nd_(0.4)Ni_(4.8)Mn_(0.2)Cu_x(x=0,0.1,0.2,013,0.4)合金系的晶胞参数、热力学性能以及贮氢性能的影响,讨论了晶胞参数与吸放氢平台压力以及吉布斯自由能之间的关系。研究结果表明,随着Cu含量的增加,晶胞参数a增加,c减小,晶胞体积先增大后减小;吸放氢平台压力随着晶胞参数a的增加呈线性降低:La_(0.6)Nd_(0.4)Ni_(4.8)Mn_(0.2)Cu_x合金的Seitz半径随着Cu含量的增加而减小,并且与△S_d/△H_d之间呈现非常好的线性关系,与△S_a/△H_a之间存在双曲线关系。 |
来源
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稀有金属材料与工程
,2008,37(10):1696-1700 【核心库】
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DOI
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10.1016/s1875-5372(09)60046-1
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关键词
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hydrogen storage alloy
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nonstoichiometric
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plateau pressure
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lattice parameters
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thermodynamic Drooerties
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地址
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Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016
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语种
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英文 |
文献类型
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研究性论文 |
ISSN
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1002-185X |
学科
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金属学与金属工艺 |
基金
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国家863计划
;
国家自然科学基金
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文献收藏号
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CSCD:3420975
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