White oxide coating on titanium alloys having high exfoliation resistance

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560857
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: University of Hyogo
• Principal Investigator: MIURA-FUJIWARA Eri 兵庫県立大学, 工学(系)研究科(研究院), 准教授 (70315258)
• Co-Investigator(Kenkyū-buntansha): OBATA Akiko 名古屋工業大学, 工学研究科, 助教 (40402656) ; YAMASAKI Tohru 兵庫県立大学, 工学研究科, 教授 (30137252)
• Co-Investigator(Renkei-kenkyūsha): KIKUCHI Takeyuki 兵庫県立大学, 工学研究科, 准教授 (50316048) ; WATANABE Yoshimi 名古屋工業大学, 工学研究科, 教授 (50231014) ; KASUGA Toshihiro 名古屋工業大学, 工学研究科, 教授 (30233729) ; NIINOMI Mitsuo 東北大学, 金属材料研究所, 教授 (50126942)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: チタン合金 / バイオマテリアル / 歯科補綴材料 / 界面強度 / コーティング / 酸化物 / 界面制御

Outline of Final Research Achievements

In addition to the strength or living body safety, the recovery of the appearance is also important for the charge for dentistries of the hard tissue alternate material. In this study, white oxidized-film was fabricated on CP Ti, which is used for dentistries, and Ti-Nb-Ta-Zr alloys, which is developed for biomedical use. The oxide film formation conditions, color tone, peel resistance, cellular affinity of the film were investigated. Based on the obtained experimental results, oxidation mechanisms were also discussed. Finally, test models such as a crown, denture base, and orthodontic arch wire were fabricated using this technique.
Any Ti alloy was able to form the white film which consisted of rutile type TiO2 as the main composition on the alloy surface by the treatment. The white film had about the same adhesiveness as epoxy adhesive, the whiteness was equivalent to the Japanese crown colour, or the value of the further was acquired.

Free Research Field

構造・機能材料