| 水热电沉积羟基磷灰石/Ti复合涂层的研究 |
| Study on Hydrothermal Electrodeposition of Hydroxyapatite/Ti Composite Coatings |
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| 摘要: 在水热电沉积羟基磷灰石（Hydroxyapatite，简称HA）涂层的电解液中加入Ti粉，制备了HA/Ti复合涂层，探讨了Ti粉的加入对涂层结合强度和生物活性的影响，并研究了涂层的热稳定性。结果表明，500 ℃焙烧2 h后，HA/Ti复合涂层的结合强度为18.4 MPa，明显高于纯HA涂层的11.2 MPa；模拟体液浸泡7 d后，涂层表层形成一层碳磷灰石。Ti粉的加入明显提高了涂层的结合强度，又不降低涂层的生物活性。500 ℃焙烧不改变涂层的相组成，焙烧温度高于600 ℃时，HA部分发生分解，Ti氧化为金 |
| 关键词: 水热电沉积 羟基磷灰石 结合强度 生物活性 |
| 基金项目: |
| Abstract: Hydroxyapatite(HA)/Ti composite coatings were successfully prepared on titanium electrode using a hydrothermal electrodeposition method via adding Ti powder in the electrolyte in an autoclave. The bonding strength, bioactivity and thermal stability of the coatings were investigated. The bonding strength of HA/Ti composite coating was up to 18.4 MPa after calcination at 500 ℃, obviously higher than that of pure HA coating. HA/Ti composite coating surface was covered by carbonate-apatite coating after immersion in simulate body fluid for 7 days, indicating that the Ti addition in HA coating improved greatly the bonding strength while not decreasing the bioactivity of the coating. Calcination at 500 ℃ had no effect on the phase composition of the coating. When calcination temperature was above 600 ℃, HA was partially decomposed and Ti powder was oxidized to rutile TiO2. TiO2 promoted the HA total decomposition when the calcination temperature was above 1 000 ℃. However, the bonding strength of the composite coating with temperature was not affected by this high temperature calcination. |
| Keywords: hydrothermal electrodeposition hydroxyapatite bonding strength bioactiity |
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| 肖秀峰,刘榕芳,郑炀曾.水热电沉积羟基磷灰石/Ti复合涂层的研究[J].无机化学学报,2004,20(11):1289-1294. |
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