Titanium porous surface bonded to a cobalt-based alloy substrate

Details Titanium porous surface bonded to a cobalt-based alloy substrate Titanium porous surface bonded to a cobalt-based alloy substrate

1990-12-21

1993-03-30

Zimmerman, John

Stock material or miscellaneous articles

All metal or with adjacent metals

Embodying fibers interengaged or between layers

428660, 428668, 623 16, A61F 228, A61F 230, B32B 1514

Patent

active

051983087

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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