Hydriding and dehydriding properties of MgH 2 - x wt. % NiMn 9.3 Al 4.0 Co 14.1 Fe 3.6 ( x = 10, 25, 50) nanocomposites have been investigated in present work. Doped alloy was prepared by arc melting method and ball milled with MgH 2 to get nanocomposites. Onset temperature as low as 180 °C was observed for MgH 2 -50 wt% system which is 80 °C lower than the as-milled MgH 2 giving 131.34 KJ/mol activation energy. Structural analysis shows tetragonal, orthorhombic and monoclinic phases for MgH 2, Al 60 Mn 11 Ni 4 and Mg 2 NiH 4 . Morphology by SEM were undertaken to investigate the effect of hydrogenation on nanostructured alloy. DSC studies show a single broad exothermic peak in the temperature range 48 °C–353 °C after alloy addition in MgH 2 . These results indicate that the hydrogenation properties of MgH 2 nanocomposite have been improved compared to the as-milled MgH 2 .
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Meena et al. (2018) studied this question.
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