3314 ハイドロキシアパタイトが析出したSiO_2膜の電気化学特性評価(S26-3 生体・環境適合材料の創製・強度評価技術開発3,S26 生体・環境適合材料の創製・強度評価技術開発)

抄録

The authors previously showed that a bioactive SiO_2 film coated on Ti-6Al-4V alloy excessively improves the corrosion resistant of the Ti-6Al-4V alloy. Though the corrosion resistant of the hydroxyapatite deposited film is not known yet. In this study, first we coated Polysilazane on to Ti-6Al-4V alloy substrate. Then we applied a treatment which to cure the film to SiO_2. Hydroxyapatite deposition was conducted by soaking to the SBF solution successively. Corrosion resistant of the hydroxyapatite deposited film was investigated by an electrochemical method. The results showed that the formation of hydroxyapatite surface layer significantly improves the corrosion resistant of the prepared Polysilazane derived SiO_2 coating.