Characterization of fluoridated hydroxyapatite/zirconia nano-composite coating deposited by a modified electrocodeposition technique

详细信息    查看全文

• 作者：Jian Wang ; Chunpeng Huang ; Qianbing Wan ; Yifan Chen ; Yonglie Chao
• 关键词：Fluoridated hydroxyapatite ; Zirconia ; Electrocodeposition ; Dissolution rate ; Composite coating
• 刊名：Surface and Coatings Technology
• 出版年：2010
• 出版时间：15 May 2010
• 年：2010
• 卷：204
• 期：16-17
• 页码：2576-2582
• 全文大小：1138 K

文摘

Fluoridated hydroxyapatite (FHA)/zirconia (ZrO₂) nano-composite coatings were codeposited by a modified electrocodeposition technique on titanium. This nano-composite coating was fabricated by adding NaF, nano-scaled ZrO₂ particles and 6 % H₂O₂ into the electrolyte using gentle ultrasonication. The microstructure, phase composition, dissolution rate, bonding strength and in vitro cellular responses of the composite coatings were investigated. The results show that FHA and nano-scaled ZrO₂ particles are relatively well distributed in the coatings, and that the addition of F⁻ and ZrO₂ reduces the crystallite size and increases the crystallinity of hydroxyapatite (HA). The approximately 5 µm thick composite coating is uniform and dense owing to the effects of H₂O₂ and ultrasonication. In addition, compared to pure HA coatings, the FHA/ZrO₂ composite coatings show higher bonding strength, lower dissolution rate and comparable in vitro bioactivity.