Brazing mixture for forming a corrosion-resistant vacuum-tight s

Details Brazing mixture for forming a corrosion-resistant vacuum-tight s Brazing mixture for forming a corrosion-resistant vacuum-tight s

1974-10-17

1976-07-13

Douglas, Winston A.

Compositions: coating or plastic

Coating or plastic compositions

Carbohydrate or derivative containing

106288B, 106304, 106 14, C09K 1504

Patent

active

039691268

ABSTRACT:
An alkali metal corrosion resistant vacuum tight metal-to-ceramic seal is formed between a high alumina ceramic body and a refractory alkali metal resistant metal member, such as Cb-1Zr, by interposing a powdered brazing mixture comprising by weight a majority of elemental columbium powder and a second metal powder selected from the class consisting of iron and nickel, and firing the assembly in vacuum at a temperature between 1500.degree.C and 1675.degree.C to partially melt a portion of the powder to form a melted bonding phase component interstitially of the undissolved columbium particles for bonding the ceramic to the metal part.

REFERENCES:
patent: 2461410 (1949-02-01), Clark

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