Method of bonding titanium to a cobalt-based alloy substrate in

Details Method of bonding titanium to a cobalt-based alloy substrate in Method of bonding titanium to a cobalt-based alloy substrate in

1992-11-30

1994-06-28

Bradley, P. Austin

Metal fusion bonding

Process

Plural joints

228194, 2282623, B23K 3102, B23K 2800, A61F 202

Patent

active

053239547

ABSTRACT:
A femoral component of a knee prosthesis, including a cobalt-based alloy substrate and a titanium fiber metal pad bonded thereto by means of an interlayer of a cobalt-based alloy including nickel. More specifically, a method of bonding a titanium porous surface to a cobalt-based alloy in an orthopaedic implant device, by first applying an interlayer of a cobalt-based alloy including nickel to the substrate and then bonding a porous structure to the interlayer. In one embodiment, an interlayer of L-605 is first applied to a substrate of Co--Cr--Mo by diffusion bonding at approximately 2200.degree. F. and then a fiber metal pad of CP-titanium is diffusion bonded to the interlayer at approximately 1650.degree. F. A layer of CP-titanium may optionally be placed intermediate the fiber metal pad and interlayer before the second diffusion step. In an alternative embodiment, MP-35N alloy may be substituted for the L-605 alloy.

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