Powdered starting material for a nickel-based alloy for...

C - Chemistry – Metallurgy – 22 – C

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319/18, 75/1.3

C22C 19/03 (2006.01) C22C 1/04 (2006.01) H01M 4/86 (2006.01) H01M 8/14 (2006.01)

Patent

CA 2036549

The invention provides a powdered starting material for a nickel-based alloy for manufacturing a porous anode of a fuel cell containing 0.5 to 10% by weight of aluminium, titanium and/or zirconium. The powder is manufactured using a mixture of carbonyl nickel powder and a powder of an intermetallic aluminium, titanium and/or zirconium compound having a particle size of 1 to 10 microns. The powder is produced by mixing the carbonyl nickel powder with an amount of an intermetallic compound such that 0.5 to 10% by weight of the desired element or elements is present in the anode material, the intermetallic compound having a particle size of 1 to 10 mm. An anode for a fuel cell can be produced from the powder by applying the powder to a substrate and sintering it at 900 to 1100°C.

L'invention porte sur une matière pulvérulente de départ pour un alliage à base de nickel, destiné à la fabrication d'une anode poreuse de pile à combustible; l'alliage renferme 0,5 à 10 % en poids d'aluminium, de titane et (ou) de zirconium. La poudre est fabriquée à l'aide d'un mélange de poudre de nickel-carbonyle et d'une poudre de particules de composé intermétallique d'aluminium, de titane et (ou) de zirconium, de 1 à 10 microns. La poudre est produite par mélange du nickel-carbonyle pulvérulent avec une certaine quantité d'un composé intermétallique, de telle façon qu'il y ait présence dans la substance anodique de 0,5 à 10 % en poids de l'élément ou des éléments recherchés, le composé intermétallique possédant une taille de 1 à 10 mm. Une anode de pile à combustible peut être obtenue à partir de la poudre en appliquant celle-ci sur un substrat et en la frittant entre 900 et 1100 degrés C.

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