Improvement in thermal shock resistance of gadolinium zirconate coating by addition of nanostructured yttria partially-stabilized zirconia |
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| Affiliation: | 1. The Key Laboratory of Inorganic Coating Materials, Chinese Academy of Sciences, Shanghai 201899, China;2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China;1. Laboratory of Nano Surface Engineering, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;2. College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, China;3. Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China;4. National Engineering Research Center for High-speed EMU, CSR Qingdao Sifang Co. Ltd., Qingdao 266111, China;1. División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Saltillo, 25280 Saltillo, Coahuila, Mexico;2. GFMA, Departamento de Física Aplicada, Escuela Técnica Superior de Ingenieros Industriales, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain;3. Instituto de Investigaciones Eléctricas, 62490 Cuernavaca, Morelos, Mexico;4. Institute of Solid State Physics, Vienna University of Technology, Wien A-1040, Austria;5. Cinvestav Unidad Saltillo, Apartado Postal 663, 25000 Saltillo, Coahuila, Mexico;1. Hebei University of Technology 300130, Tianjin, China;2. National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering, 100072, Beijing, China;1. School of Materials Science and Engineering, Beihang University, China;2. Beijing Key Laboratory for Advanced Functional Material and Thin Film Technology, Beihang University, No. 37, Xueyuan Road, Beijing 100191, China |
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| Abstract: | Gadolinium zirconate (Gd2Zr2O7, GZ) as one of the promising thermal barrier coating materials for high-temperature application in gas turbine was toughened by nanostructured 3 mol% yttria partially-stabilized zirconia (YSZ) incorporation. The fracture toughness of the composite of 90 mol% GZ-10 mol% YSZ (GZ–YSZ) was increased by about 60% relative to the monolithic GZ. Both the GZ and GZ–YSZ composite coatings were deposited by atmospheric plasma spraying on Ni-base superalloys and then thermal-shock tested under the same conditions. The thermal-shock lifetime of GZ–YSZ composite coating was improved, which is believed to be mainly attributed to the enhancement of fracture toughness by the addition of YSZ. In addition, the failure mechanisms of the thermal-shock tested GZ–YSZ composite coatings were discussed. |
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| Keywords: | C Thermal shock resistance Zirconate Plasma spray Thermal barrier coatings Fracture toughness |
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