| Oxidation and thermal fatigue of EB-PVD thermal barrier coatings on tube superalloy substrate |
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| 引用本文： | GAO Yu ZHANG Chun-xia ZHOU Chun-gen GONG Sheng-kai XU Hui-bin. Oxidation and thermal fatigue of EB-PVD thermal barrier coatings on tube superalloy substrate[J]. 中国有色金属学会会刊, 2006, 16(A02): 10-13 |
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| 作者姓名： | GAO Yu ZHANG Chun-xia ZHOU Chun-gen GONG Sheng-kai XU Hui-bin |
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| 作者单位： | Department of Materials Science and Engineering, B eijing University of Aeronautics and Astronautics, Beijing 100083, China |
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| 基金项目： | Project （50571005） supported by the National Natural Science Foundation of China |
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| 摘 要： | Two-layer structure thermal barrier coatings （TBCs） （NiCoCrAIY （bond coat）＋（6%-8%, mass fraction） Y2O3-stabilized ZrO2（YSZ top coat）） were deposited by electron beam physical vapor deposition （EB-PVD） on tube superalloy substrates. The samples were investigated by isothermal oxidation and thermal shock tests. It is found that the mass gains of the substrate with and without TBCs are 0.165 and 7.34 mg/cm^2, respectively. So the TBCs system is a suitable protection for the substrate. In thermal shock tests the vertical cracks initiate at the top coat and grow into the bond coat, causing the oxidation of the bond coat along the cracks. Failure of the TBCs system occurs by the spallation of the YSZ from the bond coat, and some micro-cracks are found at the location where the fragment of the YSZ top coat spalled from.
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| 关 键 词： | 超耐热合金 管状基质 EB-PVD 电子束物理汽相淀积 氧化 热冲击 热障涂层 热疲劳 |
| 收稿时间： | 2006-04-20 |
| 修稿时间： | 2006-06-30 |
Oxidation and thermal fatigue of EB-PVD thermal barrier coatings on tube superalloy substrate |
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| GAO Yu, ZHANG Chun-xia, ZHOU Chun-gen, GONG Sheng-kai, XU Hui-bin. Oxidation and thermal fatigue of EB-PVD thermal barrier coatings on tube superalloy substrate[J]. Transactions of Nonferrous Metals Society of China, 2006, 16(A02): 10-13 |
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| Authors: | GAO Yu ZHANG Chun-xia ZHOU Chun-gen GONG Sheng-kai XU Hui-bin |
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| Abstract: | |
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| Keywords: | thermal barrier coatings electron beam physical vapor deposition oxidation thermal shock |
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