Journal
BULLETIN OF MATERIALS SCIENCE
Volume 37, Issue 4, Pages 831-835Publisher
INDIAN ACAD SCIENCES
DOI: 10.1007/s12034-014-0013-6
Keywords
Hydrogen absorbing materials; pure magnesium; mechanical alloying/milling; microstructure; X-ray diffraction
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Hydrogen storage properties of pure Mg were studied at 593 K under 12 bar H-2. In order to increase the hydriding and dehydriding rates, pure Mg was ground under hydrogen atmosphere (reactive mechanical grinding, RMG) and its hydrogen storage properties were subsequently investigated. Pure Mg absorbed hydrogen very slowly. At the number of cycles (n) of 1, pure Mg absorbed 0-05 wt% H for 5 min, 0.08 wt% H for 10 min and 0.29 wt% H for 60 min at 593 K under 12 bar H-2. Activation was completed at the fifth cycle. At n = 6, pure Mg absorbed 1.76 wt% H for 5 min, 2.17 wt% H for 10 min and 3.40 wt% H for 60 min. The activation of pure Mg after RMG was completed at the sixth cycle. At n = 7, pure Mg after RMG absorbed 2.57 wt% H for 5 min, 3.21 wt% H for 10 min and 4.15 wt% H for 60 min.
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