不同表面处理下钛锆合金的表面形貌及其与BMP-7结合能力的比较

Surface morphology of titanium zirconium alloy with different surface treatments and their binding ability to BMP-7

目的比较三种表面处理对钛锆合金表面形貌的影响,并对比钛锆合金不同处理条件下结合蛋白量(bone morphogenetic protein-7, BMP-7)的差异。方法采用阳极氧化、喷砂酸蚀(sand blasting and acid etching, SLA)、微弧氧化(micro-arc oxidation, MAO)三种方法对钛锆合金表面进行改性处理,用扫描电子显微镜(scanning electron microscopy, SEM)观察三种表面处理方法下试件的表面形貌,筛选钛锆合金试件较为理想的表面形貌的实验条件;采用简易蒸发法在各试件表面结合BMP-7,利用BCA蛋白浓度检测法,计算蛋白浓度。结果钛锆合金试件处理适宜条件为,阳极氧化:10 V,2 h;喷砂酸蚀:100μm Al2O3,喷砂30 s,60℃下酸蚀2.5 h;微弧氧化:580V 5 min。钛锆合金微弧氧化处理后的表面形貌加载BMP-7总量多于阳极氧化及SLA。结论微弧氧化可作为钛锆合金表面的处理方法。

Objective To examine the surface morphology of titanium zirconium alloy with different surface treatments and their binding ability to BMP-7.Methods The surface morphology of titanium zirconium alloy after treatment by sand blasting,acid etching,(SLA)and micro-arc oxidation(MAO)was observed by SEM to screen the best experimental conditions.Simple evaporation method was used to apply BMP-7 on the surface of each specimen and BMP-7 concentration was detected.Results The suitable conditions for the treatment of titanium zirconium alloy were,anodizing:10 V,2 h,sandblasting:100μm Al2O3,sandblasting for 30 s,etching at 60℃for 2.5 h,micro arc oxidation:580 V 5 min.The total amount of BMP-7 loaded on the surface of titanium zirconium alloy treated by micro arc oxidation was more than that of anodizing and SLA.Conclusions Micro arc oxidation can be used as the surface treatment of titanium zirconium alloy.