Method of surface hardening orthopaedic implant devices

Details Method of surface hardening orthopaedic implant devices Method of surface hardening orthopaedic implant devices

C - Chemistry, Metallurgy

23

C

C23C 8/24 (2006.01) A61F 2/28 (2006.01) A61F 2/30 (2006.01) A61L 27/00 (2006.01) A61F 2/00 (2006.01) A61F 2/36 (2006.01)

Patent

CA 2049809

A method of surface hardening titanium orthopedic implant devices, and a titanium orthopedic implant device prepared by the disclosed method. An orthopedic implant device made of pure titanium or a titanium alloy, such as Ti-6Al-4V (ELI) is exposed to molecular nitrogen gas at a process temperature and for a process time duration sufficient to enhance surface hardness and wear resistance properties, without the formation of a measurable TiN layer that tends to increase surface roughness and diminish wear resistance properties. The process temperature is in the range of 750°F, to 1300°F., preferably about 1100°F, and the process time duration at the preferred process temperature is approximately 8 hours. The hardened surface of the titanium implant occurs primarily due to solid solution hardening of the titanium with nitrogen by dissolution.

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