Abstract
The crystallization behavior and hydrogen storage kinetics of the amorphous Mg11Y2Ni2 alloy prepared by melt-spinning technique were investigated in detail. It was found that the amorphous Mg11Y2Ni2 alloy transforms into the crystalline Mg11Y2Ni2 in metastable state at 279°C and subsequently decomposes into Mg, YMgNi4 and Y(Mg) solid solution in stable state at 366°C. All the amorphous, metastable and stable Mg11Y2Ni2 alloys can be hydrogenated into MgH2, Mg2NiH4 and YH2/YH3. However, the stable Mg11Y2Ni2 alloy has slightly slower hydrogen absorption–desorption kinetics due to the worse dispersivity of YH2/YH3 and Mg2NiH4.
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