S0201-1-2 熱酸化プロセスを利用したチタン上へのアナターゼ皮膜形成と骨適合性評価(骨再生と骨再建のためのバイオマテリアル(1),社会変革を技術で廻す機械工学)

抄録

The oxide phase on Ti, TiO_2, is known to affect their properties. Anatase has been suggested to have excellent bone forming ability as compared to rutile. The anatase layer formation on Ti and its alloys by thermal oxidation could be the low-cost and simple surface treatment for improving their bone compatibility. We developed the two-step thermal oxidation process for the anatase layer formation on CP Ti. At the first-step, CP Ti is heat-treated in an Ar-CO atmosphere. At the second-step, the specimens were oxidized in air, and anatase-rich layer was obtained in the case of that oxycarbide (TiC_xO_y) single phase was formed at the first-step. The immersion tests in simulated body fluid showed that the anatase-rich layer improved the bone compatibility of CP Ti. The bonding strength between the anatase-rich layer and CP Ti was higher than 90 MPa.