Brazed porous coating and improved method of joining metal with

Details Brazed porous coating and improved method of joining metal with Brazed porous coating and improved method of joining metal with

1988-02-29

1989-03-21

Silverberg, Sam

Prosthesis (i.e., artificial body members), parts thereof, or ai

Miscellaneous

427 2, 623 11, 623 16, 228232, 228178, 228184, A61F 124

Patent

active

048139653

ABSTRACT:
Pieces of metal are joined with silver material in a two-stage heating process. In one application, a brazed porous coating of metal particles on a metal substrate of a device is formed by interposing a silver material between the substrate and the particles, and placing the particles onto the substrate. The device is heated to a first temperature slightly below the melting point of the silver material, then briefly heated to a second temperature above 1100.degree. C. to rapidly melt the silver material to wet the particles and substrate and to generate alloying among the silver material, the particles, and the substrate. The device is allowed to cool to solidify the alloy and unite the particles and substrate to form a porous coating on the device. Also disclosed are a prosthetic device having a metal shaft for insertion into a bone canal, and a porous coating of metal particles brazed to the metal shaft by a silver material. A porous coating preparation to be applied to a metal substrate, including metal particles, silver material, and a vaporizable binder for initially securing the particles to the substrate is further disclosed.

REFERENCES:
patent: 3084064 (1963-04-01), Cowder
patent: 3119632 (1964-01-01), Skinner
patent: 3340084 (1967-09-01), Eiselohr
patent: 3905047 (1975-09-01), Long
patent: 4101691 (1978-07-01), Bachert
patent: 4489877 (1984-12-01), Sump
patent: 4570271 (1986-02-01), Sump
Pre Heating Chart, Tempil Corp. 1941.

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