Proceedings of ABM Annual Congress


ISSN 2594-5327

65º Congresso ABM vol. 65, num.65 (2010)


Title

NANOSTRUCTURED MAGNESIUM HYDRIDE PREPARED BY COLD ROLLING AND COLD FORGING

NANOSTRUCTURED MAGNESIUM HYDRIDE PREPARED BY COLD ROLLING AND COLD FORGING

DOI

10.5151/2594-5327-35721

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Abstract

Magnesium is a promising material for solid state hydrogen storage, since it has low cost and its hydride can store reversibly up to 7.6 wt. % of hydrogen. Fast H-sorption kinetics at around 300°C can be achieved after processing Mg-based mixtures by high-energy ball milling (HEBM), which produces nanostructured composite powders. Severe plastic deformation (SPD) techniques are being explored as an alternative to HEBM in order to obtain more air-resistant materials and reduce processing times. In this work, Mg, MgH2 and MgH2-Fe mixtures were severely mechanically processed by extensive cold forging and cold rolling. A very significant grain refinement (to around 10 nm) was achieved using MgH2 instead of Mg as raw material. Enhanced H-sorption kinetics properties were observed for these mechanically processed MgH2-based nanocomposites. These results are promising since it reveals the potential of using low cost mechanical processing routes to produce Mg-based nanomaterials for hydrogen storage.

 

Magnesium is a promising material for solid state hydrogen storage, since it has low cost and its hydride can store reversibly up to 7.6 wt. % of hydrogen. Fast H-sorption kinetics at around 300°C can be achieved after processing Mg-based mixtures by high-energy ball milling (HEBM), which produces nanostructured composite powders. Severe plastic deformation (SPD) techniques are being explored as an alternative to HEBM in order to obtain more air-resistant materials and reduce processing times. In this work, Mg, MgH2 and MgH2-Fe mixtures were severely mechanically processed by extensive cold forging and cold rolling. A very significant grain refinement (to around 10 nm) was achieved using MgH2 instead of Mg as raw material. Enhanced H-sorption kinetics properties were observed for these mechanically processed MgH2-based nanocomposites. These results are promising since it reveals the potential of using low cost mechanical processing routes to produce Mg-based nanomaterials for hydrogen storage.

Keywords

Magnesium is a promising material for solid state

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How to refer

Leiva, Daniel; Huot, Jacques; Jorge, Alberto; Ishikawa, Tomaz; Botta, Walter. NANOSTRUCTURED MAGNESIUM HYDRIDE PREPARED BY COLD ROLLING AND COLD FORGING , p. 5560-5560. In: 65º Congresso ABM, Rio de Janeiro, 2010.
ISSN: 2594-5327 , DOI 10.5151/2594-5327-35721