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Corrosion resistance of nitrogen ion implanted titanium alloy for medical implants in physiological saline solution

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6 Author(s)
Fukumoto, S. ; Fac. of Eng., Himeji Inst. of Technol., Hyogo, Japan ; Tsubakino, H. ; Terasawa, M. ; Mitamura, T.
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A new titanium alloy for medical implants was implanted with nitrogen ions to improve corrosion resistance in physiological saline solution. The nitrogen ion implanted titanium showed marked changes in the corrosion resistance with various doses. Ti2N was formed at lower dose and TiN was formed with increasing nitrogen dose. Corrosion potential shifted toward the noble direction and the passivation current density decreased by one order of magnitude with a dose of 2×1021 N2+/m2. No significant improvement was obtained with higher dose. Titanium alloy was implanted with nitrogen ions at multi-energy to obtain a homogeneous nitrogen concentration profile in the implanted layer. Corrosion resistance was improved by the multi-energy implantation

Published in:
Ion Implantation Technology, 2000. Conference on

Date of Conference: 2000

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