钛合金微弧氧化时间与孔结构的关系（英文）

Relationship between Micro-arc Oxide Time and Pore Structure for Titanium Alloy

为得到生物性能优良的微弧氧化陶瓷膜三维连通多孔层结构,在磷酸盐体系中于Ti6Al4V(TC4)合金表面制备了含钙磷的多孔生物陶瓷膜,并通过XRD、SEM、EDS及电化学工作站等检测手段对陶瓷膜层的物相组成、表面形貌、截面形貌、化学成分、耐腐蚀等性能进行考察,对膜层内部孔结构进行研究。结果表明:膜层中含有较多的锐钛矿、金红石及钙磷化合物,随微弧氧化时间延长,微孔与微孔之间由于多次击穿而出现三维连通的孔洞结构,使得膜层耐腐蚀性能降低,膜层中的O多数以-OH形式存在,增强了表面的生物相容性。

In order to get micro-arc oxidation(MAO) 3-D interconnected porous ceramic film structure with a good biological performance on TC4 alloy, we prepared porous ceramic film containing calcium and phosphate in phosphate system. Phase composition, surface morphology, cross-section morphology, chemical composition, roughness and corrosion resistant properties were detected by XRD, SEM, EDS, surface profiler and electrochemical detection methods to study the internal pore structure of the film. Results show that the film contains anatase, rutile, calcium and phosphorus compounds. With MAO time increasing, the holes and micro holes would be broken down many times and thus the three dimensional connected holes structure appears, reducing the coating corrosion resistance, but enhancing the surface biocompatibility.