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在不同电解液浓度的钙盐和磷酸盐混合体系中对Ti6Al4V合金进行微弧氧化(MAO)以改善其微观结构和亲水性能。利用扫描电镜、X射线衍射仪、测厚仪以及电化学工作站等对生成膜层的显微结构、物相组成、厚度以及亲水性能进行研究。结果表明:所制备的微弧氧化膜表面为粗糙多孔结构,含锐钛矿、金红石以及少量羟基磷灰石。随磷酸二氢钾浓度升高,羟基磷灰石相增多;微弧氧化膜厚度增大到一定值后不再发生变化;微弧氧化致密层与疏松层比例发生变化,增厚的疏松层表面多孔,且有较多含Ca、P的羟基磷灰石相,陶瓷膜的亲水性能提高,使得微弧氧化陶瓷膜的生物相容性得到提高。
Micro-arc oxidation (MAO) of Ti6Al4V alloy was carried out in the mixed system of calcium salt and phosphate with different electrolyte concentrations to improve its microstructure and hydrophilicity. The microstructure, phase composition, thickness and hydrophilicity of the formed film were investigated by scanning electron microscopy, X-ray diffraction, thickness gauge and electrochemical workstation. The results show that the surface of MAO film is rough and porous with anatase, rutile and a small amount of hydroxyapatite. With the concentration of potassium dihydrogen phosphate increased, hydroxyapatite phase increased; micro-arc oxide film thickness increases to a certain value does not change; micro-arc oxidation of the dense layer and the loose layer ratio changes, thickened loose surface Porous, and more containing Ca, P hydroxyapatite phase, the hydrophilic properties of the ceramic membrane increased, making the micro-arc oxidation of the ceramic membrane to improve the biocompatibility.