Oxidation Performance of Ytterbium Disilicate/Silicon Environmental Barrier Coating via Optimized Air Plasma Spraying
- 1 Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha, China
- 2 Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha, China
- 3 Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha, China
- 4 Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha, China
Abstract
Environmental barrier coatings (EBCs) play a critical role in mitigating the degradation of SiC f /SiC ceramic matrix composites (CMCs) in complex combustion environment, and improve the service life of thermal engine components. In this paper, by adjusting the parameters of atmospheric plasma spraying (APS), the spraying process of ytterbium disilicate (Yb 2 Si 2 O 7 ) under a lower power has been optimized. A two-layer EBC system consisting of ytterbium disilicate and silicon is prepared on the SiC f /SiC composite substrate by using optimized technological parameters. The thermal resistance and water oxygen corrosion resistance of such two-layer EBC system are investigated. The results indicate that the current ytterbium disilicate/silicon EBC system exhibits good phase stability, excellent water vapor and oxygen corrosion resistance. However, the exposed silicon bonding layer tends to generate an excessive thermal growth oxide (TGO) layer known as SiO 2 , leading to an early spallation of the coating.
- Padture, N.P. (2016) Advanced Structural Ceramics in Aerospace Propulsion, NAT. MATER, 15, 804-809. https://doi.org/10.1038/nmat4687
- Patra, N., Nasiri, N.A., Ni, N., Jayaseelan, D.D. and Lee, W.E. (2016) Oxidation Be-haviour of SiC/SiC Ceramic Matrix Composites in Air. J. EUR. CERAM. SOC., 36. https://doi.org/10.1016/j.jeurceramsoc.2016.05.051
- Yamada, R., Taguchi, T. and Igawa, N. (2000) Mechanical and Thermal Properties of 2D and 3D SiC/SiC Composites. J. NUCL. MATER, 283-287, 574-578. https://doi.org/10.1016/S0022-3115(00)00144-6
- Eaton, H.E. and Linsey, G.D. (2002) Accelerated Oxidation of SiC CMC’s by Water Vapor and Protection via Environmental Barrier Coating Approach. J. EUR. CERAM. SOC., 22, 2741-2747. https://doi.org/10.1016/S0955-2219(02)00141-3
- Zok, F.W., Maxwell, P.T., Kawanishi, K. and Callaway, E.B. (2019) Degradation of a SiC-SiC Composite in Water Vapor Environments. J. AM. CERAM. SOC., 103, 1927-1941. https://doi.org/10.1111/jace.16838
- Lee, K.N. (2000) Current Status of Environmental Barrier Coatings for Si-Based Ceramics. SURF. COAT. TECH., 133, 1-7. https://doi.org/10.1016/S0257-8972(00)00889-6
- Tejero-Martin, D., Bennett, C. and Hussain, T. (2021) A Review on Environmental Barrier Coatings: History, Current State of the Art and Future Developments. J. EUR. CERAM. SOC., 41, 1747-1768. https://doi.org/10.1016/j.jeurceramsoc.2020.10.057
- Lee, K.N., Fox, D.S., Eldridge, J.I., Bansal, N.P., Miller, R.A., Zhu, D. and Robinson, R.C. (2003) Upper Temperature Limit of Environmental Barrier Coatings Based on Mullite and BSAS. Symposium on Water Vapor Effects on Oxidation of High- Temperature. https://doi.org/10.1111/j.1151-2916.2003.tb03466.x
- Bradley, T. (2015) Mechanisms of Ytterbium Monosilicate/Mullite/Silicon Coating Failure during Thermal Cycling in Water Vapor. J. AM. CERAM. SOC.
- Tian, Z., Ren, X., Lei, Y., Zheng, L., Geng, W., Zhang, J. and Wang, J. (2019) Corrosion of RE 2 Si 2 O 7 (RE = Y, Yb, and Lu) Environmental Barrier Coating Materials by Molten Calcium-Magnesium-Alumino-Silicate Glass at High Temperatures. J. EUR. CERAM. SOC., 39, 4245-4254. https://doi.org/10.1016/j.jeurceramsoc.2019.05.036
- Turcer, L.R. and Padture, N.P. (2018) Towards Multifunctional Thermal Environmental Barrier Coatings (TEBCs) Based on Rare-Earth Pyrosilicate Solid-Solution Ceramics. SCRIPTA MATER, 154, 111-117. https://doi.org/10.1016/j.scriptamat.2018.05.032