Process for removal of polymer foams from nickel-coated...

C - Chemistry – Metallurgy – 22 – C

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C22C 1/08 (2006.01) B22F 3/10 (2006.01) B22F 3/11 (2006.01) H01M 4/80 (2006.01)

Patent

CA 2224338

The method of the invention produces nickel structures from nickel-coated polymer substrates. The nickel-coated polymer substrate has a nickel outer layer and initially has a temperature where the outer nickel layer lacks burst openings. Rapidly exposing the nickel-coated polymer substrate to a temperature of at least about 600°C thermally decomposes the polymer substrate and bursts holes through the outer nickel layer. The gases resulting from the thermally decomposed polymer substrate escape through the holes through the outer nickel layer to leave a nickel structure. Finally, annealing the nickel structure increases strength of the nickel structure to produce a ductile foam product.

La méthode de l'invention produit des structures nickel à partir de substrats de polymère revêtus de nickel. Le substrat de polymère revêtu de nickel possède une couche externe de nickel et, initialement, elle présente une température à laquelle la couche externe de nickel ne présente pas de trous par éclatement. Le fait d'exposer rapidement le substrat de polymère revêtu de nickel à une température d'au moins environ 600 degrés C entraîne la décomposition thermique du substrat polymérique et provoque la formation de trous dans la couche externe de nickel. Les gaz provenant du substrat polymérique thermiquement décomposé s'échappent à travers les trous dans la couche externe de nickel pour laisser une structure de nickel. Enfin, le recuit de la structure de nickel augmente la résistance de cette dernière pour produire un produit en mousse ductile.

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