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| Oxidation Resistance Behavior of La2Ce2O7/YSZ Double Ceramic Layer with Pt/Dy Doped Bond Coat |
| Received:October 30, 2018 Revised:January 25, 2019 |
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| DOI：10.7643/ issn.1672-9242.2019.01.005 |
| KeyWord:thermal barrier coating active elements modification thermal cycling double ceramic layer |
| Author | Institution |
| ZHOU Zi-min |
Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
| MU Ren-de |
Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
| GUO Meng-qiu |
Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
| TANG Zhi-hui |
Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
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| Abstract: |
| Objective To study oxidation resistance behaviors of La2Ce2O7/YSZ double ceramic layer with Pt/Dy doped bond coat. Methods The method of plating + EB - PVD was used to prepare Thermal Barrier Coatings (TBCs) with Pt/Dy doped bond coat on high temperature alloy surface. The double-ceramic layer structure was designed with lanthanum cerium acid as top (La2Ce2O7), zirconia (YSZ) as bottom. Heat cycle behavior, microstructure and failure mechanism of coating at 1200 ℃ were studied. Results After 500 cycles, a large number of cracks appeared on undoped YSZ coating layer and thermally grown oxide (TGO). The interface of Pt/Dy doped coating was combined properly after 1000 cycles. Only a small amount of micro cracks appeared at La2Ce2O7 ceramic top. Conclusion Pt elements in the adhesive layer can effectively inhibit refractory phase precipi-tation of mutual diffusion area of and delay degenerateion ofthe coating. |
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