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10. Investigations on synthesis and hydrogenation properties of Mg–20wt% Ni–1wt% TiO2 composite prepared by reactive mechanical alloying

Author

Li, Fabing, Jiang, Lijun, Du, Jun, Wang, Shumao, Liu, Xaiopeng, and Zhan, Feng

Subjects
*NONMETALS, *METALLIC composites, *COMPOSITE materials, *HYDROGEN
Abstract

Abstract: Reactive mechanical alloying (RMA) was used to prepare Mg–20wt% Ni–1.0wt% TiO2 composite materials. A nanocrystalline composite of MgH2 and Mg2NiH4 formed after 60h of ball-milling. An increase of the nanocrystalline size was found after 20hydriding/dehydriding cycles. It absorbed more than 80% of its full capacity in the temperature range of 363–543K within less than 1min and desorbed 3.22mass% of hydrogen at 578K under a hydrogen pressure of 0.1MPa in 1h. DSC analysis shows that the thermodynamic property of Mg-based hydrogen storage alloys do not be changed by the addition of TiO2 and ball-milled process. [Copyright &y& Elsevier]

Published
2008
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