한국표면공학회지 (Journal of the Korean institute of surface engineering)

  • 제54권6호
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  • Pages.331-339
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  • 2021
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  • 1225-8024(pISSN)
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  • 2288-8403(eISSN)
한국표면공학회 (The Korean Institute of Surface Engineering)
권호 표지
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환경차폐코팅용 이터븀 실리케이트의 제조와 물성평가

Fabrication and Characterization of Ytterbium Silicates for Environmental Barrier Coating Applications

  • 최재형 (한국세라믹기술원 이천분원 엔지니어링세라믹센터) ;
  • 김성원 (한국세라믹기술원 이천분원 엔지니어링세라믹센터)
  • Choi, Jae-Hyeong (Engineering Ceramics Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Seongwon (Engineering Ceramics Center, Korea Institute of Ceramic Engineering and Technology)
  • 투고 : 2021.12.17
  • 심사 : 2021.12.29
  • 발행 : 2021.12.31
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초록

Environmental barrier coatings(EBCs) are applied to the SiC/SiC ceramic matrix composites(CMCs) in order to protect CMCs from being corroded with water vapor by combustion gas in gas turbine engines. Ytterbium silicates, such as ytterbium monosilicate and ytterbium disilicate, are ones of the candidate materials for EBCs due to their excellent resistance to water vapor corrosion as well as thermal-expansion match with SiC. In this study, ytterbium silicates are fabricated with 2-step solid-state synthesis targeting ytterbium disilicate. After synthesizing ytterbium monosilicate, the mixtures of ytterbium monosilicate and SiO2 are heat-treated and densified by using pressureless sintering or hot pressing with a variety of heating conditions. The phase formation, thermal expansion, and oxidation behavior are examined with fabricated specimens. The final densified bodies are found to be composites between ytterbium monosilicate and ytterbium disilicate with different ratios, which results in 4.43 to 6.72×10-6/K range of coefficients of thermal expansion. The probability of these ytterbium silicates for EBC applications is also discussed.

키워드

과제정보

This work was supported by the Technology Innovation Program (SiC fiber reinforced ceramic composite improved environmental performance developed ceramic coating layer, No. 20011237) funded by the Ministry of Trade, Industry & Energy (MOTIE).

참고문헌

  1. D. R. Clarke, M. Oechsner, N. P. Padture, Thermal-Barrier Coatings for More Efficient Gas- Turbine Engines, MRS Bull. 37 (2012) 891-898. https://doi.org/10.1557/mrs.2012.232
  2. N. P. Padture, Advanced Structural Ceramics in Aerospace Propulsion, Nature Mater. 15 (2016) 804-809. https://doi.org/10.1038/nmat4687
  3. K. N. Lee, D. Zhu, R. S. Lima, Perspectives on Environmental Barrier Coatings (EBCs) Manufactured via Air Plasma Spray (APS) on Ceramic Matrix Composites (CMCs): A Tutorial Paper, J. Therm. Spray Tech. 30 (2021) 40-58. https://doi.org/10.1007/s11666-021-01168-0
  4. D. Tejero-Martin, C. Bennett, T. Hussain, A Review on Environmental Barrier Coatings: History, Current State of the Art, J. Euro. Ceram. Soc. 41 (2021) 1747-1768. https://doi.org/10.1016/j.jeurceramsoc.2020.10.057
  5. C. G. Levi, Emerging Materials and Processes for Thermal Barrier Systems, Curr. Opi. in Sol. St. Mater. Sci. 8 (2004) 77-91. https://doi.org/10.1016/j.cossms.2004.03.009
  6. F. L. Riley, Structural Ceramics: Fundamentals and Case Studies, Cambridge University Press, Cambridge (2000) 190.
  7. E. J. Opila, J. L. Smialek, R. C. Robinson, D. S. Fox, N. S. Jacobson, SiC Recession Caused by SiO2 Scale Volatility under Combustion Conditions: II, Thermodynamics and Gaseous-diffusion Model, J. Am. Ceram. Soc. 82 (1999) 1826-1834. https://doi.org/10.1111/j.1151-2916.1999.tb02005.x
  8. K. N. Lee, Environmental Barrier Coatings for CMCs, Ceramic Matrix Composites. N. P. Bansal, J. Lamon Ed., Wiley, New York (2015) 430.
  9. Y. Xu, X. Hu, F. Xu and K. Li, Rare Earth Silicate Environmental Barrier Coatings: Present Status and Prospective, Ceram. Int. 43 (2017) 5847-5855. https://doi.org/10.1016/j.ceramint.2017.01.153
  10. C.-S. Kwon, S.-M. Lee, Y.-S. Oh, H.-T. Kim, B.-K. Jang, S. Kim, Structure and Thermal Conductivity of Thermal Barrier Coatings in Lanthanum/Gadolinium Zirconate System Fabricated via Suspension Plasma Spray(in Korean), J. Kor. Inst. Surf. Eng. 47 (2014) 316-320. https://doi.org/10.5695/JKISE.2014.47.6.316
  11. C.-S. Kwon, S. Lee, S.-M. Lee, Y.-S. Oh, H.-T. Kim, B.-K. Jang, S. Kim, Fabrication andCharacterization of La2Zr2O7/YSZ Double-Ceramic-Layer Thermal Barrier Coatings Fabricated by Suspension Plasma Spray(in Korean), J. Kor. Inst. Surf. Eng. 48 (2015) 315-321. https://doi.org/10.5695/JKISE.2015.48.6.315
  12. S. Lee, S.-M. Lee, Y.-S. Oh, H.-T. Kim, S. Nahm, S. Kim, Fabrication and Characteristics of Thermal Barrier Coatings in the La2O3-Gd2O3-ZrO2 System by Using Suspension Plasma Spray with Different Suspension Preparations(in Korean), J. Kor. Inst. Surf. Eng. 49 (2016) 595-603. https://doi.org/10.5695/JKISE.2016.49.6.595
  13. E. Bakan, D. Marcano, D. Zhou, Y. J. Sohn, G. Mauer, R. Vassen., Yb2Si2O7 Environmental Barrier Coatings Deposited by Various Thermal Spray Techniques: A Preliminary Comparative Study, J. Therm. Spray. Tech. 26 (2017) 1011-1024. https://doi.org/10.1007/s11666-017-0574-1
  14. R. Vassen, E. Bakan, C. Gatzen, S. Kim, D. E. Mack and O. Guillon, Environmental Barrier Coatings Made by Different Thermal Spray Technologies, Coatings 9 (2019) 784. https://doi.org/10.3390/coatings9120784
  15. K. N. Lee, R. A. Miller, N. S. Jacobson, New Generation of Plasma-Sprayed Mullite Coatings on Silicon-Carbide, J. Am. Ceram. Soc. 78(1995) 705-710. https://doi.org/10.1111/j.1151-2916.1995.tb08236.x
  16. B. T. Richards, H. Zhao and H. N. G. Wadley, Structure, Composition, and Defect Control During Plasma Spray Deposition of Ytterbium Silicate Coatings, J. Mater. Sci. 50 (2015) 7939-7957. https://doi.org/10.1007/s10853-015-9358-5
  17. E. Garcia, H. Lee and S. Sampath, Phase and Microstructure Evolution in Plasma Sprayed Yb2Si2O7 Coatings, J. Euro. Ceram. Soc. 39 (2019) 1477-1486. https://doi.org/10.1016/j.jeurceramsoc.2018.11.018
  18. E. Bakan, Y.J. Sohn, W. Kunz, H. Klemm, R. Vassen, Effect of Processing on High-Velocity Water Vapor Recession Behavior of Yb-Silicate Environmental Barrier Coatings, J. Euro. Ceram. Soc. 39 (2019) 1507-1513. https://doi.org/10.1016/j.jeurceramsoc.2018.11.048
  19. K. N. Lee, Current Status of Environmental Barrier Coatings for Si-Based Ceramics, Surf. Coat. Technol. 133-134 (2000) 1-7. https://doi.org/10.1016/S0257-8972(00)00889-6
  20. G.C.C.Costa, N.S.Jacobson, Mass Spectrometric Measurements of the Silica Activity in the Yb2O3-SiO2 System and Implications to Assess the Degradation of Silicate-Based Coatings in Combustion Environments, J. Euro. Ceram. Soc. 35 (2015) 4259-4267. https://doi.org/10.1016/j.jeurceramsoc.2015.07.019
  21. B. W. Rosen, Z. Hashin, Effective Thermal Expansion Coefficients and Specific Heats of Composite Materials, Int. J. Eng. Sci. 8 (1970) 157-173. https://doi.org/10.1016/0020-7225(70)90066-2
  22. R. A. Golden, K. Mueller, E.J.Opila, Thermochemical Stability of Y2Si2O7 in High-Temperature Water Vapor, J. Am. Ceram. Soc. 103(2020) 4517-4535. https://doi.org/10.1111/jace.17114
  23. Vapor Pressure of Water Calculator, https://www.omnicalculator.com/chemistry/vapour-pressure-of-water.