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Improving The Bioactivity Of Niti Shape Memory Alloy By Heat And Alkali Treatment

机译:通过热处理和碱处理提高Niti形状记忆合金的生物活性

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TiO_2 films were formed on an NiTi alloy surface by heat treatment in air at 600℃. Heat treated NiTi shape memory alloys were subsequently alkali treated with 1 M,3 M and 5 M NaOH solutions respectively, to improve their bioactivity. Then treated NiTi samples were soaked in 1.5SBF to evaluate their in vitro performance. The results showed that the 3 M NaOH treatment is the most appropriate method. A large amount of apatite formed within 1 day's soaking in 1.5SBF, after 7 day's soaking TiO_2/HA composite layer formed on the NiTi surface. SEM, XRD, FT-IR and TEM results showed that the morphology and microstructure are similar to the human bone apatite.
机译:通过在600℃的空气中热处理在NiTi合金表面形成TiO_2薄膜。随后将热处理过的NiTi形状记忆合金分别用1 M,3 M和5 M NaOH溶液进行碱处理,以提高其生物活性。然后将处理过的NiTi样品浸泡在1.5SBF中以评估其体外性能。结果表明,3 M NaOH处理是最合适的方法。在NiTi表面浸泡7天后,在1.5SBF中浸泡1天后,形成了大量的磷灰石。 SEM,XRD,FT-IR和TEM结果表明,形貌和微观结构与人骨磷灰石相似。

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