CMAS corrosion resistance,thermal shock resistance and numerical simulation of novel surface micromesh thermal barrier coatings |
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| Affiliation: | 1. State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;2. College of Optics and Electronic Science and Technology, China Jiliang University, Hangzhou 310018, China;3. Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronics Engineering, Jiangsu Normal University, Xuzhou 221116, China;4. Henan Key Laboratory of Research for Central Plains Ancient Ceramics, Pingdingshan 467000, China;5. Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, United Kingdom;1. Advanced Materials Center, Institute of Nanotechnology and Materials Engineering, Gdańsk University of Technology, 11/12G. Narutowicza Street, 80-233 Gdańsk, Poland;2. Department of Built Environment and Energy Technology, Linnaeus University, 35195 Växjö, Sweden;1. National Key Laboratory of Advanced Composites, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, PR China;2. College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, No.29 Jiangjun Ave., Nanjing 211106, PR China;1. School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China;2. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China;2. Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing, 100081, China |
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| Abstract: | Thermal barrier coatings (TBCs) are widely used as insulating layers to protect the underlying metallic structure of gas turbine blades. However, the thermal cycling performance of TBCs is affected by their complex working environments, which may shorten their service life. Previous studies have shown that preparing a mesh structure in the bonding layer can relieve thermal stress and improve the bonding strength, thereby prolonging the service life of TBCs. In this paper, a micromesh structure was prepared on the surface of the bonding layer via wet etching. The microstructure and failure mechanism of the micromesh TBCs after CMAS (CaO-MgO-Al2O3-SiO2) thermal erosion were investigated. Numerical simulation was combined with thermal shock experiments to study the stress distribution of the micromesh-structured TBCs. The results showed that the circular convex structure can effectively improve the CMAS corrosion resistance and thermal shock resistance of TBCs. |
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| Keywords: | Thermal barrier coatings CMAS corrosion resistance Thermal shock resistance Numerical simulation |
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