Metal fusion bonding – Process – Diffusion type
Patent
1996-05-29
1998-01-06
Heinrich, Samuel M.
Metal fusion bonding
Process
Diffusion type
2282628, B23K 3102
Patent
active
057045380
ABSTRACT:
A method for joining rhenium to columbium and columbium based alloys that minimizes the formation of brittle intermetallics. First, a layer of ruthenium is applied to both the rhenium and columbium and then heated until the ruthenium diffuses with the rhenium and columbium respectively. A braze foil is place between the two outer ruthenium layers and the assembly is heated in a range of 50.degree. C. to 100.degree. C. above the liquidus of the braze, thereby joining the rhenium to the columbium. Alternatively, the ruthenium coated surfaces are placed in contact and diffused together under a compressive load of at least 1000 psi.
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Allied-Signal Inc.
Heinrich Samuel M.
Holden Jerry J.
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