Metal-ceramic composite air braze with ceramic particulate

Details Metal-ceramic composite air braze with ceramic particulate Metal-ceramic composite air braze with ceramic particulate

B - Operations, Transporting

23

K

B23K 35/22 (2006.01) B23K 35/32 (2006.01) C04B 37/00 (2006.01) C04B 37/02 (2006.01)

Patent

CA 2679846

A method for joining together two or more ceramic and/or metal parts by providing a braze consisting of a mixture of copper oxide, silver, and ceramic particulate. The braze is placed upon the surfaces of the parts, which are then held together for sufficient time and at a sufficient temperature to cause the braze to form a bond between the parts. The addition of the ceramic particulate increases the viscosity of the braze, decreasing squeeze out, decreasing the formation of air pockets, decreases the formation of brittle phases by providing nucleation sites and increases the flexural strength of the joint.

L'invention concerne un procédé permettant de joindre ensemble deux parties en céramique et/ou métal ou plus en faisant une brasure constituée d'un mélange d'oxyde de cuivre, d'argent et d'une particule céramique. La brasure est placée sur les surfaces des parties qui sont ensuite maintenues ensemble pendant un temps suffisant et à une température suffisante pour amener la brasure à former une liaison entre les parties. L'addition de la particule céramique augmente la viscosité de la brasure, en diminuant le serrage, en diminuant la formation de poches d'air, diminue la formation de phases fragiles en formant des sites de nucléation et augmente la résistance à la flexion du joint.

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