Process and apparatus for making ceramic articles

Details Process and apparatus for making ceramic articles Process and apparatus for making ceramic articles

C - Chemistry, Metallurgy

04

B

C04B 35/64 (2006.01) C04B 35/565 (2006.01) C04B 35/65 (2006.01) C23C 4/18 (2006.01) F27D 1/16 (2006.01)

Patent

CA 2206041

A process and apparatus for making a ceramic article, especially pipes and tubes of ceramic material such as silicon carbide, in which the article is formed by projecting a ceramic powder mixture comprising refractory particles and combustible particles against a smooth-surfaced metal former which is heated to a temperature of at least 850 ~C where in the presence of an oxygen- rich gas the combustible particles react exothermically to produce from the refractory particles and the reaction product of the combustible particles a coherent refractory article in the shape of the former.

Cette invention concerne un procédé et un appareil pour la fabrication d'articles en céramique, notamment de tuyaux et de tubes contenant des matériaux céramiques tels que le carbure de silicium. L'article est fabriqué par la projection d'un mélange à base de poudre de céramique contenant également des particules réfractaires et des particules combustibles, sur une filière métallique lisse chauffée à une température d'au moins 850 ~C. En présence d'un gaz riche en oxygène, les particules combustibles produisent une réaction exothermique permettant d'obtenir, à partir des particules réfractaires et du produit de la réaction des particules combustibles, un article réfractaire cohérent de la forme de la filière.

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