C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 1/04 (2006.01) B22F 1/00 (2006.01) B22F 3/12 (2006.01) B22F 7/00 (2006.01) C22C 1/05 (2006.01) C22C 1/06 (2006.01) C22C 19/03 (2006.01)
Patent
CA 2567199
A composition for use with alloys including extra-fine nickel powder dispersed with a hydrophobic inorganic dispersant which is preferably high-purity fumed silica treated with hexamethyldisilazane. The composition prevents the agglomeration of the nickel powder, thereby preventing weaknesses in alloys, like steel for example, formed with the nickel powder. A method for making an alloy with the composition includes mixing the nickel powder with other metals and/or nonmetals and the hydrophobic fumed silica to form an alloy blend, pressing the alloy blend, and sintering the alloy blend.
L'invention concerne une composition utilisée avec des alliages contenant une poudre de nickel extra-fine dispersée à l'aide d'un dispersant inorganique hydrophobe, de préférence de la silice fumée de haute pureté traitée avec de l'héxaméthyldisilazane. La composition empêche l'agglomération de la poudre de nickel, prévenant ainsi l'apparition de faiblesses dans les alliages, par exemple l'acier, formés à l'aide de la poudre de nickel. L'invention concerne un procédé de fabrication d'un alliage à l'aide de ladite composition, consistant à mélanger la poudre de nickel avec d'autres métaux et/ou non métaux et la silice fumée hydrophobe pour former un mélange d'alliage, à comprimer le mélange d'alliage, et à fritter le mélange d'alliage.
Campbell Scott Thomas
Singh Tajpreet
Stephenson Thomas Francis
Inco Limited
Smart & Biggar
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