F-掺杂对镁合金表面含羟基磷灰石复合陶瓷涂层性能的影响

材料热处理学报, 2014, 35(9): 161-166.

F-掺杂对镁合金表面含羟基磷灰石复合陶瓷涂层性能的影响

周广宏 ^1, , 丁红燕 ^2, , 朱庆灵 ^3, , 张娜 ^4, , 侯化龙 ^5, , 曹维克 ^6, , 庞利群 ^7,

1.淮阴工学院江苏省介入医疗器械研究重点实验室,江苏淮安223003

2.淮阴工学院江苏省介入医疗器械研究重点实验室,江苏淮安223003

3.淮阴工学院江苏省介入医疗器械研究重点实验室,江苏淮安223003

4.淮阴工学院江苏省介入医疗器械研究重点实验室,江苏淮安223003

5.江苏大学材料科学与工程学院,江苏镇江212013

6.淮安市第一人民医院,江苏淮安223002

7.淮安市第一人民医院,江苏淮安223002

基金项目: 江苏省介入医疗器械研究重点实验室开放基金项目(JR1211) 国家自然科学基金(51175212)

关键词：镁合金 , 微弧氧化 , HA涂层 , 耐蚀性 , 血液相容性

Properties of fluorine-doped hydroxyapatite ceramic coatings prepared by micro-arc oxidation on magnesium alloy

Keywords： magnesium alloy , micro-arc oxidation , HA coating , corrosion resistance , blood compatibility

通过在电解液中添加适量的氟化铵和羟基磷灰石(HA)颗粒,采用微弧氧化法在AZ31B镁合金表面制备了含有F-和HA的活性陶瓷涂层,研究了F-的加入对涂层的组织形貌、耐蚀性能、亲水性能和血液相容性能的影响.结果表明:电解液中添加F-能有效抑制含HA陶瓷膜层的表面微裂纹的形成,并提高了陶瓷涂层的耐蚀性,腐蚀电位从-1.208 V提高至-0.978 V,腐蚀电流密度降低一个数量级,腐蚀速率减缓了近4倍.此外,F-能提高含HA陶瓷膜层的亲水性能,其静态水的接触角从18.7°降为6.8°,表面血小板粘附量显著减少,呈现出良好的血液相容性.

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