Powder mixture or composite powder, a method for production...

C - Chemistry – Metallurgy – 22 – C

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C22C 1/05 (2006.01) B22F 9/22 (2006.01) B22F 9/24 (2006.01)

Patent

CA 2394844

The invention relates to a method for the production of power mixtures, or composite powders, from at least one first type of powder chosen from the group, high-melting metals, physically resistant materials, or ceramic powders and at least one second type of powder, chosen from the group of binding metals, binding metal mixed crystals and binding metal alloys. The second type of powder is produced, in an aqueous suspension of the first type of powder, from precursor compounds, which are in the form of water-soluble salts, by precipitation as the oxalate, separating the mother liquor and reduction to the metal.

L'invention concerne des mélanges de poudres ou poudres composites, comprenant au moins un premier type de poudre sélectionné dans le groupe comprenant les métaux à point de fusion élevé, les substances dures et les poudres céramiques, et au moins un deuxième type de poudre sélectionné dans le groupe comprenant les liants, les cristaux mixtes de liants et les alliages de liants. Le deuxième type de poudre est produit dans une suspension aqueuse du premier type de poudre, à partir de composés précurseurs se présentant sous la forme de sels hydrosolubles, par précipitation sous forme d'oxalate, séparation de l'eau mère et réduction en métal.

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