Sinterable structures and a method of producing the same

Details Sinterable structures and a method of producing the same Sinterable structures and a method of producing the same

C - Chemistry, Metallurgy

04

B

C04B 38/00 (2006.01)

Patent

CA 2368759

A method of producing an open, porous structure having an outer surface defining a shape having a bulk volume and having interconnecting openings extending throughout said volume and opening through said surface, and products resulting from the method. The method comprises preparing a viscous mixture comprising a sinterable powder dispersed in a sol of a polymer in a primary solvent, replacing the primary solvent with a secondary liquid in which the polymer is insoluble to produce a gel comprising an open polymeric network having the sinterable powder arranged therein, removing the secondary liquid from the gel; removing the polymer network, and sintering the sinterable powder to form the open, porous structure. Also disclosed are shaped, porous products resulting from methods of the invention.

L'invention concerne un procédé permettant de produire une structure ouverte et poreuse pourvue d'une surface externe qui définit une forme présentant un volume apparent et comportant des ouvertures d'interconnexion traversant ce volume et débouchant sur ladite surface, ainsi que des produits résultant de ce procédé. Le procédé consiste à préparer un mélange visqueux contenant une poudre frittable dispersée dans un sol de polymère dans un solvant primaire, à remplacer le solvant primaire par un liquide secondaire dans lequel le polymère est insoluble de manière à produire un gel contenant un réseau polymère où l'on répartit la poudre frittable, à extraire le liquide secondaire du gel, à enlever le réseau polymère et à fritter la poudre frittable de manière à former la structure ouverte et poreuse. L'invention porte également sur des produits formés et poreux résultant des procédés de cette invention.

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