COUILLAUD, Samuel; ENOKI, H.; AMIRA, S.; BOBET, Jean-Louis; AKIBA, Etsuo; HUOT, J.

doi:10.1016/j.jallcom.2009.05.037

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COUILLAUD, Samuel
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

ENOKI, H.
National Institute of Advanced Industrial Science and Technology [AIST]

AMIRA, S.
Physics Department, Institut de Recherche sur l'Hydroge?ne

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Journal of Alloys and Compounds. 2009, vol. 484, n° 1-2, p. 154-158

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The effect of high energy milling and cold rolling on the BCC solid solution TiV<sub>1.6</sub>Mn<sub>0.4</sub> was investigated. The as-cast alloy presented a nanocrystalline structure with a crystallite size of 17 nm. After 5 h of milling a slight reduction of crystallite size was measured and the BCC solid solution lattice parameter was reduced from 3.082 Å to 3.061 Å. Cold rolling also had for effect a reduction of crystallite size and lattice parameter. The main effect of cold rolling was to produce a highly textured alloy along the (2 0 0) Bragg peak. The as-cast alloy could store a maximum of 3.48 wt.% of hydrogen at 423 K and has a reversible capacity of 1.8 wt.%. The ball -milled and cold rolled samples did not absorb hydrogen even after 10 hydrogenation/dehydrogenation cycles. Possible reasons why ball milled and cold rolled samples did not absorb hydrogen are discussed.< Réduire

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Cold rolling

Ball milling

BCC alloys

Nanocrystalline

Hydrogen absorption

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Effect of ball milling and cold rolling on hydrogen storage properties of nanocrystalline TiV<sub>1.6</sub>Mn<sub>0.4</sub> alloy

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