Magnesium mechanical alloys for thermal hydrogen storage

Details Magnesium mechanical alloys for thermal hydrogen storage Magnesium mechanical alloys for thermal hydrogen storage

C - Chemistry, Metallurgy

22

C

C22C 23/00 (2006.01) C01B 3/00 (2006.01) C01B 6/04 (2006.01) C22C 1/04 (2006.01) C22C 45/00 (2006.01) H01M 4/38 (2006.01) H01M 8/06 (2006.01)

Patent

CA 2206252

Mechanically alloyed hydrogen storage materials having a major atomic percentage of magnesium and a minor atomic percentage of at least two elements selected from the group consisting of nickel, molybdenum, iron and titanium. Preferably the mechanical alloy comprises a multi-phase material, including at least one amorphous phase. Also, the at least two elements are preferably either nickel (from about 5 to 15 at.%) and molybdenum (from about 0.5 to 5 at.%) or iron (from about 5 to 15 at.%) and titanium (from about 5 to 15 at.%). The hydrogen storage materials are created by mechanical alloying in a milling apparatus under an inert atmosphere, such as argon, or a mixed atmosphere, such as argon and hydrogen. The speed and length of the milling are varied.

Matériaux de stockage d'hydrogène en alliage mécanique possédant un pourcentage atomique supérieur de magnésium et un pourcentage atomique inférieur d'au moins deux éléments sélectionnés à partir du groupe constitué par nickel, molybdène, fer et titane. Cet alliage mécanique comprend, de préférence, un matériau à phases multiples, y compris au moins une phase amorphe. Les deux éléments au moins sont, de préférence, soit du nickel (de 5 à 15%) et du molybdène (de 0,5 à 5%), soit du fer (de 5 à 15%) et du titane (de 5 à 15%). L'alliage mécanique de ces matériaux de stockage d'hydrogène est réalisé dans une broyeuse sous une atmosphère inerte, telle que de l'argon, ou une atmosphère mixte, telle qu'argon et hydrogène. La vitesse et la longueur du broyage sont variables.

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