钛合金长期植入体内依然存在磨损和腐蚀的问题,因此钛合金表面改性的目的就是提高其表面耐蚀性、耐磨性并赋予生物活性.本文在3种不同的电解液中,采用等离子电解氧化技术在TA1纯钛表面制备含有Ca、P的氧化钛多孔复合陶瓷层.研究了不同电解液中,改变工艺参数对纯钛表面陶瓷层平均厚度和生长机制的影响.采用扫描电镜和能谱分析了电流密度改变时,3种不同电解液中生成复合陶瓷膜的表截面形貌以及成分.结果表明,相同的电流密度,在电解液B中,陶瓷膜初始击穿电位最大,电解液C中陶瓷膜初始击穿电位值最小.正向电流为16 A/dm2时,在电解液A中陶瓷膜表面出现粉末状团聚物,在电解液B和C中,没有粉末状团聚物出现.无论是工艺参数还是电解液成分,对纯钛生物陶瓷膜的生长过程与组织结构都产生很大的影响,适当控制可制备所需的功能陶瓷膜.
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