微弧氧化改善钛金属表面生物活性研究

Study on Biological Activity of Titanium Metal Surface Improved by Micro-arc Oxidation

为改善钛金属的生物相容性,采用微弧氧化技术在钛表面注入钙、磷等离子进行表面改性,采用XRD检测四种生物涂层的物相组成,用SEM观察涂层表面形貌,然后对其进行模拟体液培养,分析其生物活性。结果表明:二次微弧氧化涂层主要物相为Ti、TiO2、HA,钙磷盐+自然铜电解液微弧氧化制备的涂层主要物相为Ti、TiO2、HA、Fe3O4;经二次微弧氧化制备的生物涂层比其他涂层的表面多孔结构更均匀,且孔隙率较大,生物活性较优异;钙磷盐+自然铜涂层表面也存在多孔结构,由于其存在人体所需的微量元素,因此其生物活性较优异。

In order to improve the biological activity of titanium, titanium mental surface was modified by micro-arc oxidation technique with calcium and phosphorus ions. The phase composition of the four coatings was tested by XRD;surface morphology was observed by SEM. Then the biological activity was analyzed through simulated body fluid（SBF）. The results show that the main phase is Ti,TiO2 and HA in secondary micro-arc oxidation coating; the main phase are Ti, TiO2, HA and Fe3O4 in calcium phosphate salts＋micro-arc oxidation of natural copper electrolyte preparation coating. The coating which was treated with double micro-arc oxidation has uniform porous structure surface and the porosity is larger; the biological activity is better than other coatings. The coating obtained in electrolyte solution containing calcium irons, phosphate and native copper electrolyte solution has also porous structure surface. As it exists microelements which are needed in human body, its biological activity is excellent.