Affiliation:
1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2. School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
Abstract
With the development of industry, the operating temperature of aero engines and gas turbines continues to increase; developing thermal barrier coatings (TBCs) with superior resistance to CaO-MgO-Al2O3-SiO2 (CMAS) corrosion has become a prominent research focus. In this study, atmospheric plasma spraying (APS) was used to prepare yttria-stabilized zirconia (YSZ), nanostructured yttria-stabilized zirconia (n-YSZ), and Gd-Yb-Y-stabilized zirconia (GYYSZ) coatings. The effects of CMAS exposure on the microstructure, chemical composition, phase transition, and microhardness of the coatings were investigated. Comparative analysis revealed that both phase transition and exfoliation occurred in corroded YSZ and n-YSZ coatings, with n-YSZ exhibiting more pronounced changes. In contrast, GYYSZ coatings remained stable without phase transition and exhibited a smaller increase in microhardness (270 HV0.3). Consequently, doping Gd/Yb/Y elements into ZrO2 can improve the performance of TBCs.
Funder
Key Research Program of the Chinese Academy of Sciences
IMR Innovation Fund
Subject
Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces
Reference55 articles.
1. Thermal Barrier Coatings for Gas-Turbine Engine Applications;Padture;Science,2002
2. Progress in Ceramic Materials and Structure Design toward Advanced Thermal Barrier Coatings;Wei;J. Adv. Ceram.,2022
3. Li, P., Jin, X., Lu, P., Liu, D., Mou, R., and Fan, X. (2023). Comparative Study on Microstructure Evolution and Failure Mechanisms of Ordinary and Refurbished EB-PVD TBC under Cyclic Oxidation. J. Adv. Ceram.
4. Experimental Investigation on the Effect of Ceramic Coating on the Wear Resistance of Al6061 Substrate;Chinnusamy;J. Mater. Res. Technol.,2019
5. Ceramic Top Coats of Plasma-Sprayed Thermal Barrier Coatings: Materials, Processes, and Properties;Bakan;J. Therm. Spray Tech.,2017