| V-7.4Zr-7.4Ti-7.4Ni储氢合金的热力学研究 |
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| 引用本文： | 赵 铭,宋西平,裴 沛,张沛龙.V-7.4Zr-7.4Ti-7.4Ni储氢合金的热力学研究[J].稀有金属材料与工程,2009,38(4):651-654. |
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| 作者姓名： | 赵 铭 宋西平 裴 沛 张沛龙 |
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| 作者单位： | 北京科技大学新金属材料国家重点实验室,北京,100083 |
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| 摘 要： | 采用高纯Zr、V、Ti、Ni金属粉末为原料制备了V-7.4Zr-7.4Ti-7.4Ni合金,利用金相显微镜、扫描电镜和X射线衍射仪对合金的显微组织结构进行分析,测试了不同温度下合金的放氢PCT曲线,并根据化学反应热力学公式对其热力学参数进行计算.研究发现:该合金为两相结构,主相为V基固溶体,第二相为Laves相:在室温和353 K时合金的放氢PCT曲线上有明显的压力平台,最大放氢量分别为3.11%和2.31%(质量分数).热力学计算发现:V基固溶体相为其主要吸放氢相,对放氢PCT曲线上平台的形成有显著的影响;合金放氢PCT曲线平台所对应的氢化物平衡反应温度为358.4 K.
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| 关 键 词： | 储氢合金 PCT曲线:热力学 |
| 收稿时间： | 2008/3/29 0:00:00 |
| 修稿时间： | 2008/11/13 0:00:00 |
Thermodynamics of V-7.4Zr-7.4Ti-7.4Ni Hydrogen Storage Alloy |
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| Zhao Ming,Song Xiping,Pei Pei and Zhang Peilong.Thermodynamics of V-7.4Zr-7.4Ti-7.4Ni Hydrogen Storage Alloy[J].Rare Metal Materials and Engineering,2009,38(4):651-654. |
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| Authors: | Zhao Ming Song Xiping Pei Pei and Zhang Peilong |
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| Affiliation: | State Key Laboratory for Advanced Metals and Materials;University of Science and Technology Beijing;Beijing 100083;China |
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| Abstract: | In this study,V-7.4Zr-7.4Ti-7.4Ni alloy was prepared from high-pure Zr,V,Ti and Ni metal powders.The microstructure of alloy was investigated by using optical metallograph,scanning electron microscope(SEM) and XRD.The hydrogen desorbing PCT curves have been obtained at different temperatures.The thermodynamic parameters were calculated according to the chemical reaction equilibrium equations.It is found that the microstructure of alloy is consisted of two phases,a main phase of V based solid solution phase,... |
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| Keywords: | hydrogen storage alloy PCT curve thermodynamics |
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