超声辅助微弧氧化钛合金钙磷涂层生长机制研究  

Growth Mechanism of Ca-P Coating Fabricated by Ultrasonic Assisted Micro-arc Oxidation on Titanium Alloy

作　　者：王凤彪[1] 张旗 刘静凯[1] 赵艳丽[1] 舒启林[1] 

机构地区：[1]沈阳理工大学机械工程学院,辽宁沈阳110168 [2]国网营口供电公司,辽宁营口115000

出　　处：《电镀与精饰》2017年第1期1-5,共5页Plating & Finishing

基　　金：2013年辽宁省教育厅科学研究项目(项目号L2013514)

摘　　要：采用超声辅助微弧氧化复合工艺在钛合金表面制备了钙磷生物涂层。采用扫描电镜和电子能谱仪测试了涂层表面形貌和元素组成,分析了超声辅助微弧放电特性,建立了MAO系统等效电路,提出了复合工艺所制备涂层的Ti O2相氧化机制及钙磷相合成机制。结果表明:复合工艺提前了微弧放电时间,降低了起弧电压,增加了有效微弧放电时间;钙离子主要通过电源脉间等效电熔放电和超声作用提高电泳活性并吸附于阳极,并与磷酸根离子反应生成钙磷生物相;配置工作液时要求钙、磷应有较大比值,且工作液中钙离子和磷酸根离子浓度应增大。研究对超声辅助微弧氧化复合工艺制备高性能钛合金生物涂层具有指导意义。Ca-P coating was prepared by ultrasonic assisted micro-arc oxidation（UA ＋ MAO） composite process on titanium alloy surface. Surface morphology and element composition of the coating were tested by scanning electron microscopy（SEM） and electron energy spectrum,characteristics of the ultrasonic assisted micro-arc discharge was analyzed,MAO system equivalent circuit was established,TiO2 phase oxidation mechanism and Ca-P phase synthesis mechanism of the coating prepared by the composite process were put forward. Results showed that micro-arc discharge time was cut down,arc voltage was reduced and effective micro-arc discharge time was increased by this composite process; calcium ions improved the electrophoretic activity mainly through equivalent capacitance discharge between the pulses and ultrasonic effect,and adsorbed on the anode,then reacted with phosphate ions to form Ca-P phase; for the electrolyte configuration,large ratio of calcium and phosphorus was required,and the concentrations of calcium and phosphorus should be increased. These research have guidance significance on preparation of titanium alloy biological coating using ultrasonic assisted microarc oxidation composite process.

关 键 词：微弧氧化 超声辅助 钛合金 钙磷生物涂层 空化效应 生长机制 

分 类 号：TG174.451[金属学及工艺—金属表面处理]