Crystallization behavior and hydrogen storage kinetics of amorphous Mg11Y2Ni2 alloy

Crystallization behavior and hydrogen storage kinetics of amorphous Mg11Y2Ni2 alloy
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非晶Mg11Y2Ni2合金的结晶行为及储氢动力学

DOI:
10.1016/j.jallcom.2012.11.046
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发表时间:
2013-02
影响因子:
6.2
通讯作者:
Q.A. Zhang, L.X. Zhang, Q.Q. Wang
Q.A. Zhang, L.X. Zhang, Q.Q. Wang
中科院分区:
材料科学2区
文献类型:
--
作者:
Q.A. Zhang, L.X. Zhang, Q.Q. Wang

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研究了快淬法制备的Mg 11 Y2 Ni 2非晶合金的晶化行为和储氢动力学。结果表明,非晶态Mg 11 Y2 Ni 2合金在279°C时转变为亚稳态的晶态Mg 11 Y2 Ni 2,在366°C时分解为Mg、YMgNi 4和Y(Mg)固溶体。非晶、亚稳和稳定的Mg_(11)Y_(2Ni)_2合金均能被氢化成MgH_2、Mg_2Ni_(H4)和YH_2/YH_3。但由于YH 2/YH 3和Mg 2NiH 4的分散性较差,稳定的Mg 11 Y2 Ni 2合金吸放氢动力学稍慢。
The crystallization behavior and hydrogen storage kinetics of the amorphous Mg11Y2Ni2alloy prepared by melt-spinning technique were investigated in detail. It was found that the amorphous Mg11Y2Ni2alloy transforms into the crystalline Mg11Y2Ni2in metastable state at 279°C and subsequently decomposes into Mg, YMgNi4and Y(Mg) solid solution in stable state at 366°C. All the amorphous, metastable and stable Mg11Y2Ni2alloys can be hydrogenated into MgH2, Mg2NiH4and YH2/YH3. However, the stable Mg11Y2Ni2alloy has slightly slower hydrogen absorption–desorption kinetics due to the worse dispersivity of YH2/YH3and Mg2NiH4.
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