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采用射频磁控溅射技术在表面微结构纳米化316L不锈钢和粗晶粒316L不锈钢基体上制备掺钽TiO2薄膜。采用扫描电镜和X射线衍射仪分析薄膜形貌和晶体结构,用体外模拟人体体液浸泡实验研究薄膜的生物活性。结果表明:表面微结构纳米化的316L不锈钢具有强烈诱导掺钽TiO2薄膜形核效应;316L不锈钢表面微结构纳米化能显著提高自身及其表层掺钽TiO2薄膜的生物活性;316L不锈钢表面纳米化后,其表层掺钽TiO2薄膜诱导的羟基磷灰石形貌由原先的球状变为多孔网状结构。
The radio frequency magnetron sputtering technique was used to prepare tantalum-doped TiO2 thin films on surface microstructured 316L stainless steel and 316L stainless steel. The morphology and crystal structure of the film were analyzed by scanning electron microscopy and X-ray diffractometry. The biological activity of the film was studied by in vitro simulated body fluid immersion test. The results show that the nano-sized 316L stainless steel with surface microstructure has a strong effect of inducing the nucleation effect of tantalum-doped TiO2 film. The nano-structure of 316L stainless steel microstructure can significantly enhance the biological activity of itself and its surface doped with tantalum-doped TiO2 film. , The surface of the doped tantalum TiO2 film induced hydroxyapatite morphology from the original spherical to porous network structure.