采用NaOH溶液对钛材表面含Ca,P微弧氧化膜进行水热处理能提高其医学性能,过去从水热处理工艺方面的探讨不多.在纯钛表面制备了含Ca,P的微弧氧化膜,并采用不同pH值的NaOH溶液进行水热处理制得了羟基磷灰石(HA)/TiO2复合微弧氧化陶瓷层.分别采用X射线衍射(XRD)、扫描电镜(SEM)观察、能谱(EDS)分析、显微硬度及接触角测量等方法对水热处理前后陶瓷膜的化学成分、微观形貌、润湿性和显微硬度进行了研究.结果表明:含Ca,P氧化膜经NaOH溶液于210℃水热处理,其表面可以形成结晶度较高的棒状HA;随着溶液pH值升高,HA晶粒数量不断增加,晶粒长度逐渐减小,HA层逐渐细化和均匀;溶液pH值高于12.0时,氧化膜发生破坏并导致HA剥落;溶液pH值和温度分别为10.5和210℃时水热处理效果最好.
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