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

Author

Fukumoto, S. ; Tsubakino, H. ; Terasawa, M. ; Mitamura, T. ; Nakamura, K. ; Okazaki, Y.

Author_Institution

Fac. of Eng., Himeji Inst. of Technol., Hyogo, Japan

fYear

2000

fDate

2000

Firstpage

777

Lastpage

780

Abstract

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

Keywords

aluminium alloys; corrosion resistance; current density; ion implantation; niobium alloys; nitrogen; passivation; prosthetics; tantalum alloys; titanium alloys; N concentration profile; N ion implanted Ti alloy; Ti₂N; TiAlNbTa:N; TiN; corrosion potential; corrosion resistance; medical implants; multi-energy implantation; passivation current density; physiological saline solution; Atherosclerosis; Corrosion; Immune system; Implants; Ion implantation; Microstructure; Nitrogen; Substrates; Tin; Titanium alloys;

fLanguage

English

Publisher

ieee

Conference_Titel

Ion Implantation Technology, 2000. Conference on

Conference_Location

Alpbach

Print_ISBN

0-7803-6462-7

Type

conf

DOI

10.1109/.2000.924269

Filename

924269