Preparation of metal-matrix composite materials using...

Details Preparation of metal-matrix composite materials using... Preparation of metal-matrix composite materials using...

C - Chemistry, Metallurgy

22

C

C22C 1/10 (2006.01)

Patent

CA 2339803

A composite material is prepared by furnishing a mass of ceramic particles, such as aluminum oxide or spinel particles, and contacting a source of magnesium or other passivating metal with the mass of ceramic particles. Magnesium is deposited onto the surfaces of the particles in the absence of added oxygen and nitrogen. A source of aluminum or other matrix metal is infiltrated into the mass of ceramic particles to form an aluminum (or other metal)-containing composite material. This composite material may be further dispersed into a second source of aluminum or other matrix metal to form a composite material of a lower volume fraction of particles.

L'invention porte sur la préparation d'un matériau composite consistant à mettre en contact une masse de particules céramiques, par exemple d'oxyde d'aluminium ou de spinelle, avec une source de magnésium ou d'un autre métal de passivation. Le magnésium se dépose à la surface des particules sans adjonction d'oxygène et d'azote. On infiltre une source d'aluminium ou d'un autre métal formant matrice dans la masse de particules de manière à former un matériau composite contenant de l'aluminium (ou un autre métal). Ledit matériau composite peut ensuite être dispersé dans une deuxième source d'aluminium ou d'autres métaux matrices pour former un matériau composite comportant une fraction volumique plus faible de particules.

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