Improvement of corrosion resistance and bio compatibility of medical Nickel-Titanium alloys through forming TiO2thin film

Y. Kimura
2011 Surface Effects and Contact Mechanics X   unpublished
Nickel-Titanium alloys have been investigated for applying to various surgical procedures. However, little is known about the toxicity of Ni-elements and the actual conditions of surface modification of Ni-Ti alloy for preventing the toxicity of Ni. In this study, the corrosion resistance of Ni-Ti alloys was improved through making TiO 2 thin film by conducting in air oxidation and reactive sputtering. These thin films were characterized using FE-SEM, XRD, XPS and AFM. And judging from the
more » ... ization curves obtained by electrochemical measurement in a quasi-living body environment, corrosion resistance of Ni-Ti super elastic alloy was evaluated. In addition, the effect of air oxidized Ni-Ti alloy specimen upon cell multiplication and morphological change of cell were investigated by culturing cell 72 hrs on Ni-Ti alloy specimen surface with TiO 2 thin film. From these considerations, some trials for establishing a method for TiO 2 thin film formation on the surface of Ni-Ti alloy were conducted from the view point of improving biocompatibility.
doi:10.2495/secm110131 fatcat:yqyh7zx4njfgnhbatlkwnutyri