钛合金微弧氧化生物活性陶瓷膜润湿性及耐腐蚀性能研究  

Wettability and corrosion resistance of bioactive ceramic film by micro-arc oxidation on titanium alloy

作　　者：史兴岭[1] 玄加申[1] 位莉[1] 王庆良[1] 

机构地区：[1]中国矿业大学材料科学与工程学院,江苏徐州221116

出　　处：《金属热处理》2008年第7期37-41,共5页Heat Treatment of Metals

基　　金：国家"973"计划课题(2007CB607605);中国矿业大学基金项目(2005B032)

摘　　要：通过微弧氧化技术(MAO)在Ti6Al4V合金表面获得了富含Ca、P的生物陶瓷膜,对陶瓷膜的物相组成、微观形貌及其在Hank’s模拟体液中的阳极极化行为进行了研究,分析了不同微弧氧化电压对陶瓷膜润湿性能及耐腐蚀性能的影响。结果表明,所制备的陶瓷膜表面粗糙多孔,主要由锐钛矿、金红石以及少量羟基磷灰石和无定形相组成。随着微弧氧化电压升高陶瓷膜中的金红石和羟基磷灰石的含量增加,陶瓷膜中微孔数量减少,但尺寸增加,孔隙率变化不明显。微弧氧化膜的接触角随微弧氧化电压的升高不断减小,说明润湿性能逐渐改善,陶瓷膜的粗糙度和物相是主要影响因素。微弧氧化膜使合金在模拟体液中发生阳极电阻极化,氧化电压越高耐腐蚀性能越好。Bioactive ceramic film containing Ca and P was prepared by microarc oxidation （MAO） on the surface of Ti6Al4V alloy. The composition, micro-morphology of the film and it＇ s anodic polarization behaviors in Hank＇ s SBF （ simulating body fluid） were studied. Effects of different MAO voltage on the wettability and corrosion resistance of the film were analyzed. The results show that the film with a rough and porous surface is mainly composed of anatase, rutile, little hydroxyapatite （HA） and amorphous phase. With increasing the MAO voltage, the ratios of rutile and hydroxyapatite in the film increased, and micro-holes in films decreased in number but increased in dimension, and the total porosities changed slightly. Contact angle of the film decreased with increasing the MAO voltage, indicating better wettability for which;surface roughness and composition of the film are the main factors. Due to the MAO film, resistance polarization happened when samples were inserted in SBF, and the corrosion resistance improved with the increase of the MAO voltage.

关 键 词：TI6AL4V钛合金 微弧氧化 生物活性陶瓷膜 润湿性 耐腐蚀性能 

分 类 号：TG174.453[金属学及工艺—金属表面处理]