电解液Ca、P浓度对纯钛表面微弧氧化膜结构和特性的影响

Effect of different concentration of calcium and phosphor in electrolytic solution on the structure and characteristics of micro arc oxidized film on surface of pure titanium

目的:研究电解液不同Ca、P浓度对纯钛表面微弧氧化膜结构和特性的影响。方法:根据电解液中Ca、P浓度的不同,将纯钛试件分成A、B和C共3组,通过微弧氧化技术制备纯钛表面氧化膜,D组作对照组。使用扫描电镜(SEM)检测氧化膜的表面及横断面形貌,用X射线能谱仪(EDS)检测氧化膜的元素成分,用X射线衍射仪(XRD)检测氧化膜的晶相结构。结果:微弧氧化处理后,钛表面形成微孔结构的氧化膜。A组膜层厚度为5μm,B和C组膜层厚度为10μm。高Ca、P浓度组微弧氧化膜的Ca、P含量高于低Ca、P浓度组(P<0.05、P<0.01)。微弧氧化膜的主要成分是金红石、锐钛矿和羟基磷灰石。结论:利用微弧氧化技术在纯钛表面形成含羟基磷灰石的多孔氧化膜,氧化膜的Ca、P含量与电解液的Ca、P含量有关。

Objective： To study the effect of different concentration of calcium and phosphor in electrolytic solution on the structure and characteristics of micro arc oxidized film on the surface of pure titanium.Methods： Titanium samples were divided into A,B,and C groups according to different concentration of calcium and phosphor in electrolytic solution,and D group as the control group.After micro arc oxidation（MAO）,the morphology of the oxide film was monitored with scanning electron microscopy（SEM）,and the elemental composition and crystalline structure of the oxide film was analyzed by X-ray energy dispersive spectrometer（EDS） and X-ray diffraction（XRD）.Results： Microporous oxide film was formed on pure titanium surface by micro arc oxidation.The thickness of the MAO film in the group A was 5μm and those in the group B and C were 10μm respectively.The contents of calcium and phosphor in the MAO film increased according to the concentration of calcium and phosphor in the electrolytic solution（P 0.05 and P 0.01）.The phase of components of the MAO film included anatase,rutile and hydroxyapatite.Conclusion： The porous oxide film containing hydroxyapatite can be formed on the surface of pure titanium by MAO,and the contents of calcium and phosphor in the MAO film are related with the concentrations of calcium and phosphor in the electrolytic solution.