Evaluations of Microstructure and Hydrogenation Properties on Mg2NiHx Hydrogen Absorbing Alloys by Hydrogen Induced Mechanical Alloying

Abstract:

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In order to fabricate high efficiency, light-weight hydrogen storage materials in an economical way, we have been made to propose a new mechanical alloying process by high-pressure hydrogen induced planetary ball milling(HIMA) using Mg and Ni chips. Microstructural evaluations of the Mg-Ni-H systems synthesized were investigated by scanning electron microscopy and the transmission electron microscopy. X-ray diffraction analysis was also made to characterize the lattice constant, crystallite size and misfit strain. The hydrogenation properties of the particles synthesized were evaluated by automatic PCI (pressure-composition-isotherm). Adopting 66:1 BCR (ball to chips mass ratio) for HIMA process, fully hydrogenated alloys were obtained after 96 hrs of milling, resulting in total hydrogen content of 2.25 mass%.

Info:

Periodical:

Materials Science Forum (Volumes 544-545)

Edited by:

Hyungsun Kim, Junichi Hojo and Soo Wohn Lee

Pages:

311-314

DOI:

10.4028/www.scientific.net/MSF.544-545.311

Citation:

W. G. Kim et al., "Evaluations of Microstructure and Hydrogenation Properties on Mg2NiHx Hydrogen Absorbing Alloys by Hydrogen Induced Mechanical Alloying ", Materials Science Forum, Vols. 544-545, pp. 311-314, 2007

Online since:

May 2007

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Price:

$35.00

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