外加电场对EB-PVD热障涂层的高温氧化行为影响[EB/OL]
北京：中国科技论文在线
最终对热障涂层高温氧化行为和失效产生影响
通过施加外电场控制氧离子从YSZ表面向YSZ/MCrAlY界面扩散
对EB-PVD制备的双层结构YSZ/MCrAlY热障涂层试样施加20V直流电场
利用SEM、EDS观察分析了YSZ/MCrAlY界面热生长氧化物TGO结构形貌和成分
而与电源负极连接一侧的涂层出现鼓包失效
） Abstract： In view of YSZ as oxygen ion conductor at high temperatures, 20V DC electric field was exerted to YSZ / MCrAlY thermal barrier coatings specimen prepared by EB-PVD to perform isothermal oxidation at 1050℃ for 80h
Morphology and composition of YSZ / MCrAlY interface TGO after oxidation were analyzed by means of SEM and EDS
Result shows that the YSZ coat connected with electric field anode had well adhered to bond coat and TGO was compact, but the YSZ coat connected with electric field negative occurred buckling failure and MCrAlY bond coat occurred serious internal oxidation
It is concluded that applied electric field can control the oxygen ions diffusion from the YSZ surface to the YSZ / MCrAlY interface and change the YSZ / MCrAlY interface partial pressure of oxygen and oxygen vacancy concentration, ultimately, affect high-temperature oxidation behavior and failure of thermal barrier coatings
Keywords： Thermal barrier coatings;High temperature oxidation;external electric field;Oxygen ion diffusion 下载PDF阅读器 PDF全文下载： 初稿 （ 143 ） 作者简介： 通信联系人： 【收录情况】 中国科技论文在线： 陈立强
