Interfacial texture-driven failure behaviors of Gd/Yb co-doped YSZ thermal barrier coatings under thermal cyclic loading: Design and optimization
Double ceramic layer (DCL) thermal barrier coatings (TBCs) with excellent thermal shock resistance have been developed but are weakest at the inter-ceramic interface. It is desirable to improve the interfacial bonding between the ceramic layers to further enhance service reliability. In this study,...
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2025-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425007884 |
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| author | Kehan Yang Junmiao Shi Kaiming Zhang Xiaolong Chen Fuqiang Tian Song Wu Xiancheng Zhang |
| author_facet | Kehan Yang Junmiao Shi Kaiming Zhang Xiaolong Chen Fuqiang Tian Song Wu Xiancheng Zhang |
| author_sort | Kehan Yang |
| collection | DOAJ |
| description | Double ceramic layer (DCL) thermal barrier coatings (TBCs) with excellent thermal shock resistance have been developed but are weakest at the inter-ceramic interface. It is desirable to improve the interfacial bonding between the ceramic layers to further enhance service reliability. In this study, an interfacial texture deposition strategy was proposed to strengthen the inter-ceramic interface of the self-developed DCL TBCs. Specifically, eight interfacial textures were deposited at the interfaces between YSZ and RYSZ (where R represents two rare-earth oxides, Gd2O3 and Yb2O3, R = 6.5 wt%) layers, followed by thermal cycling tests to explore their critical roles in the failure behaviors of DCL TBCs. Microstructural evolutions, phase compositions, and stress variations were investigated in detail. The relationship between texture and interfacial separation was identified. A denser texture spacing led to a smaller flaking area. Ultimately, the coating performance reached its optimum when the interfacial texture had a diameter of 2.5 mm, a spacing of 1.5 mm, and a height of 200 μm. After 230 thermal cycles at 1150 °C, the flaking area was only 23 % of that observed in untextured TBCs, and the layer RYSZ did not undergo phase transformation. This study provides theoretical support for interfacial texture and lanthanide-doped YSZ design of TBCs. |
| format | Article |
| id | doaj-art-399c7e095cb04c74ac23af6bf6116a7e |
| institution | DOAJ |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-399c7e095cb04c74ac23af6bf6116a7e2025-08-20T03:16:46ZengElsevierJournal of Materials Research and Technology2238-78542025-05-01362207221810.1016/j.jmrt.2025.03.278Interfacial texture-driven failure behaviors of Gd/Yb co-doped YSZ thermal barrier coatings under thermal cyclic loading: Design and optimizationKehan Yang0Junmiao Shi1Kaiming Zhang2Xiaolong Chen3Fuqiang Tian4Song Wu5Xiancheng Zhang6Key Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai, 200237, ChinaKey Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai, 200237, China; Corresponding author.Key Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai, 200237, ChinaInstitute of Advanced Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou, 510632, China; Corresponding author.Key Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai, 200237, ChinaDongfang Electric Corporation Dongfang Turbine Co., LTD, Deyang, 618000, China; State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment, Deyang, 618000, ChinaKey Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai, 200237, ChinaDouble ceramic layer (DCL) thermal barrier coatings (TBCs) with excellent thermal shock resistance have been developed but are weakest at the inter-ceramic interface. It is desirable to improve the interfacial bonding between the ceramic layers to further enhance service reliability. In this study, an interfacial texture deposition strategy was proposed to strengthen the inter-ceramic interface of the self-developed DCL TBCs. Specifically, eight interfacial textures were deposited at the interfaces between YSZ and RYSZ (where R represents two rare-earth oxides, Gd2O3 and Yb2O3, R = 6.5 wt%) layers, followed by thermal cycling tests to explore their critical roles in the failure behaviors of DCL TBCs. Microstructural evolutions, phase compositions, and stress variations were investigated in detail. The relationship between texture and interfacial separation was identified. A denser texture spacing led to a smaller flaking area. Ultimately, the coating performance reached its optimum when the interfacial texture had a diameter of 2.5 mm, a spacing of 1.5 mm, and a height of 200 μm. After 230 thermal cycles at 1150 °C, the flaking area was only 23 % of that observed in untextured TBCs, and the layer RYSZ did not undergo phase transformation. This study provides theoretical support for interfacial texture and lanthanide-doped YSZ design of TBCs.http://www.sciencedirect.com/science/article/pii/S2238785425007884Thermal barrier coatingsInterfacial textureThermal cyclic loadingMicrostructureFailure |
| spellingShingle | Kehan Yang Junmiao Shi Kaiming Zhang Xiaolong Chen Fuqiang Tian Song Wu Xiancheng Zhang Interfacial texture-driven failure behaviors of Gd/Yb co-doped YSZ thermal barrier coatings under thermal cyclic loading: Design and optimization Journal of Materials Research and Technology Thermal barrier coatings Interfacial texture Thermal cyclic loading Microstructure Failure |
| title | Interfacial texture-driven failure behaviors of Gd/Yb co-doped YSZ thermal barrier coatings under thermal cyclic loading: Design and optimization |
| title_full | Interfacial texture-driven failure behaviors of Gd/Yb co-doped YSZ thermal barrier coatings under thermal cyclic loading: Design and optimization |
| title_fullStr | Interfacial texture-driven failure behaviors of Gd/Yb co-doped YSZ thermal barrier coatings under thermal cyclic loading: Design and optimization |
| title_full_unstemmed | Interfacial texture-driven failure behaviors of Gd/Yb co-doped YSZ thermal barrier coatings under thermal cyclic loading: Design and optimization |
| title_short | Interfacial texture-driven failure behaviors of Gd/Yb co-doped YSZ thermal barrier coatings under thermal cyclic loading: Design and optimization |
| title_sort | interfacial texture driven failure behaviors of gd yb co doped ysz thermal barrier coatings under thermal cyclic loading design and optimization |
| topic | Thermal barrier coatings Interfacial texture Thermal cyclic loading Microstructure Failure |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425007884 |
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