Method of forming a ceramic to ceramic joint

Details Method of forming a ceramic to ceramic joint Method of forming a ceramic to ceramic joint

C - Chemistry, Metallurgy

04

B

C04B 37/00 (2006.01) B32B 18/00 (2006.01)

Patent

CA 2573637

A method of joining at least two sintered bodies to form a composite structure, includes: providing a joint material between joining surfaces of first and second sintered bodies; applying pressure from 1 kP to less than 5 MPa to provide an assembly; heating the assembly to a conforming temperature sufficient to allow the joint material to conform to the joining surfaces; and further heating the assembly to a joining temperature below a minimum sintering temperature of the first and second sintered bodies. The joint material includes organic component(s) and ceramic particles. The ceramic particles constitute 40-75 vol.% of the joint material, and include at least one element of the first and/or second sintered bodies. Composite structures produced by the method are also disclosed.

Cette invention concerne une méthode permettant d'assembler au moins deux corps frittés pour former une structure composite. La méthode comprend les éléments suivants : l'application d'un matériau d'assemblage entre les surfaces d'assemblage de chacun des corps frittés, l'application d'une pression allant de 1 kPa à moins de 5 MPa pour assurer l'assemblage, le chauffage de l'ensemble jusqu'à une température de conformation suffisante pour permettre au matériau d'assemblage de se conformer aux surfaces d'assemblage et un autre chauffage de l'ensemble jusqu'à une température d'assemblage inférieure à la température de frittage minimum des deux corps frittés. Le matériau d'assemblage comprend un ou plusieurs composés organiques et des particules céramiques. Ces dernières constituent de 40 % à 75 % du matériau d'assemblage en volume et sont composées d'au moins un élément de l'un ou l'autre des corps frittés. Les structures composites produites à l'aide de cette méthode sont également révélées.

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