NiTi形状记忆合金表面化学法制备生物活性层工艺的优化

Optimization of Bioactive Layer Processing Using Chemical Method on the Surface of NiTi SMA

采用正交试验方法对影响仿生溶液法制备生物活性层特性的工艺参数进行了优化设计。优化后的工艺条件为 :酸处理 ,在 6 0℃的 30 %HNO3溶液中处理 2 4h ;碱处理 ,在 90℃的 5mol/LNaOH溶液中浸泡 7h。利用优化后的工艺在NiTi合金表面制备了均匀。

The orthogonal test was adopted to optimize the process parameters,which affect the characters of the bioactive layer formulated by the simulated body fluid method.The optimum parameters were determined:60℃,30%HNO 3 and 24h for acid treatment and 90℃,5mol/L NaOH solution and 7h for alkali treatment.A uniform and compact bioactive layer was fabricated on the surface of NiTi alloy using the optimized parameters.