Hydrogen desorption properties of melt-spun and hydrogenated Mg-based alloys using in situ synchrotron X-ray diffraction and TGA
Hydrogen desorption properties of melt-spun and hydrogenated Mg-based alloys using in situ synchrotron X-ray diffraction and TGA
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DOI：
10.1016/j.jallcom.2010.10.067
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发表时间：
2011-09
影响因子：
6.2
通讯作者：
S. Kalinichenka;L. Röntzsch;C. Baehtz;T. Weissgärber;B. Kieback
中科院分区：
文献类型：
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作者：
S. Kalinichenka;L. Röntzsch;C. Baehtz;T. Weissgärber;B. Kieback
采用熔体旋压法制备了Mg90Ni10、Mg80Ni10Y10和Mg85Cu5Ni5Y5三种镁基合金，并比较了它们的放氢性能。通过热重分析在150°C至250°C的不同温度下研究了它们在活化和氢化后的氢解吸动力学。结果发现，与 Mg90Ni10 和 Mg85Cu5Ni5Y5 相比，Mg80Ni10Y10 表现出更快的解吸动力学，高达 1.3wt.%-H2/min。通过原位同步加速器X射线衍射详细研究了相应的晶体相变。研究发现，Mg90Ni10、Mg80Ni10Y10 和 Mg85Cu5Ni5Y5 的加氢动力学受不同反应路径控制。
Three magnesium-based alloys, Mg90Ni10, Mg80Ni10Y10and Mg85Cu5Ni5Y5, were prepared by melt-spinning and compared regarding their hydrogen desorption properties. Their hydrogen desorption kinetics after activation and hydrogenation was investigated by thermogravimetry at different temperatures in the range from 150°C to 250°C. It was found that Mg80Ni10Y10exhibits a much faster desorption kinetics in comparison to Mg90Ni10and Mg85Cu5Ni5Y5of up to 1.3wt.%-H2/min. The corresponding crystal phase transformations were investigated in detail by in situ synchrotron X-ray diffraction. It was found that the kinetics of hydrogenation is controlled by different reaction pathways for Mg90Ni10, Mg80Ni10Y10and Mg85Cu5Ni5Y5.