氧化时间对钛表面微弧氧化膜层的影响  

Influence of Oxidation Time on Micro-arc Oxidation Coating on Titanium Substrate

作　　者：闫凤英[1] 石玉龙[1] 莫伟言[1] 

机构地区：[1]青岛科技大学材料科学与工程学院,青岛266042

出　　处：《表面技术》2010年第4期42-44,共3页Surface Technology

基　　金：山东省自然科学基金资助项目(Y2006F07)

摘　　要：采用恒电流微弧氧化技术,在钛表面制得含HA的TiO2陶瓷膜,考察了氧化时间对氧化膜微观形貌、膜厚、相结构及耐体液腐蚀性能的影响。结果表明,随氧化时间增长,膜层表面多孔形貌变化明显,膜层厚度呈先增后降的趋势。氧化时间延长,膜层相组成由金红石、锐钛矿为主变为以羟基磷灰石为主。模拟体液极化曲线分析表明,微弧氧化膜的钝化行为随氧化时间延长而优异,但氧化时间超过20 min后,增大氧化时间对钝化效果的影响不再明显。A micro-arc oxidation mode of invariable current density was used to form ceramic coating of hydroxyapatite-containing TiO2 on titanium substrate.The influence of oxidation time on the micro-morphology,thickness and phase structure of coating as well as resistant humor corrosion was investigated.The results reveals that the morphologies of porous and rough coatings change with the protracting of oxidation time.The thickness of the coating increases along with oxidation time,but it will become thinner if the oxidation time is too long.The coating is composed of rutile and anatase when the oxidation time is shorter while it is composed of HA mainly when the oxidation time is longer.The passivation performance of the coating formed for longer time is better than that formed for shorter time.When the oxidation time excesses 20 min,it＇s effect on the passivation performance of the coating is no longer evidence.

关 键 词：微弧氧化 氧化时间 钛 

分 类 号：TG174.453[金属学及工艺—金属表面处理]