| Failure of EB-PVD Thermal Barrier Coatings Subjected to Thermo-Mechanical Loading |
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| 作者姓名： | CHEN Chen ZHANG Chun-xia GUO Hong-bo GONG Sheng-kai ZHANG Yue |
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| 作者单位： | School of Materials Science and Engineering, Beij＇ing University of Aeronautics and Astronautics, Beijing 100083, China |
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| 基金项目： | National Natural Science Foundation of China （50571005） |
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| 摘 要： | Thermal barrier coatings （TBCs） were developed to protect metallic blades and vanes working in turbo-engines. The two-layered structure TBCs, consisting of NiCoCrAlY bond coat and yttria stabilized zirconia （YSZ）, were deposited on a cylinder of superalloy substrate by the electron beam-physical vapor deposition （EB-PVD）. The failure mechanism of the TBCs was investigated with a thermo-mechanical fatigue testing system under the service condition similar to that for turbine blades. Non-destructive evaluation of the coated specimens was conducted through the impedance spectroscopy. It is found that the crack initiation mainly takes place on the top coat at the edge of the heated zones.
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| 关 键 词： | 热障涂层 电子束-物理汽相淀积 热力-机械负荷 失效 |
| 收稿时间： | 2006-08-10 |
| 修稿时间： | 2006-11-06 |
Failure of EB-PVD Thermal Barrier Coatings Subjected to Thermo-Mechanical Loading |
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| CHEN Chen ZHANG Chun-xia GUO Hong-bo GONG Sheng-kai ZHANG Yue.Failure of EB-PVD Thermal Barrier Coatings Subjected to Thermo-Mechanical Loading[J].Chinese Journal of Aeronautics,2006,19(B12):82-85. |
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