微弧氧化时间对纯钛表面膜层微观结构的影响

Structure and composition of titanium oxidation coating with different micro-arc oxidation time

背景:微弧氧化技术中电解液、实验电参数和时间等因素对种植体表面膜层整体性能影响相对较大。目的:观察微弧氧化时间对种植体表面膜层微观结构的影响。方法:应用微弧氧化技术在含钙磷化合物的电解液中制备纯钛表面氧化膜层,通过改变微弧氧化时间(5,10,15min)观察纯钛表面微弧氧化膜微观结构的变化。结果与结论:微弧氧化处理后,纯钛表面生成微孔结构的氧化膜,随着处理时间的延长,膜层表面微孔直径增大,数量减少,膜层厚度增加;元素组成中,膜层中钙磷含量随处理时间的延长而增加,且钙磷原子比例也加大。粗糙度实验表明微弧氧化处理时间越长,轮廓算术平均偏差值Ra越大,表面越粗糙。表明时间参数是控制氧化膜层微观结构的重要变量,通过掌握时间因素的影响趋势,可以更容易获得理想的微弧氧化膜层。

BACKGROUND：Electrolyte, electronic parameters and time are three main factors in a micro-arc oxidation experiment, influencing the overall implant properties. OBJECTIVE：To observe the effect of micro-arc oxidation time on the morphology, structure and composition of implant coating. METHODS：The oxidation coating was prepared on titanium surface by using micro-arc oxidation technique in aqueous electrolyte solution containing calcium acetate monohydrate and sodium phosphate monobasic dihydrate. By changing the micro-arc oxidation time, microstructure changes were detected on the surface of titanium. RESULTS AND CONCLUSION：The coatings were rough and porous. The longer oxidation time, the thicker coating, the larger diameter of porous, but the fewer porous numbers. As the treatment time increased, the surface roughness of micro-arc oxidation specimens increased, meanwhile the content and proportion of elements Ca and P was increased in the coatings. Therefore, the treatment time is an important factor in micro-arc oxidation technology, especially for the microstructure on the coating surface. By controlling oxidation time in a certain value, the ideal oxidation coatings can be acquired easily in the future, with good biological properties.