Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
권호 표지
DOI QR코드

DOI QR Code

Deposition uniformity of 7 wt% YSZ as a thermal barrier coating with different configurational arrangement for turbine blade shape mock-up by electron beam physical vapor deposition

터빈블레이드 형상 mock-up의 기하학적 배치조건에 따른 전자빔 물리기상증착법으로 제조된 7 wt% YSZ 열차폐 코팅의 코팅 균일성

  • Oh, Yoon-Suk (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Chae, Jung-Min (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Ryu, Ho-lim (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Han, Yoon-Soo (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • An, Jong-Kee (Gas Turbine Development Team, Aerospace R&D Center, Hanwha Aerospace) ;
  • Son, Myung-Sook (Gas Turbine Development Team, Aerospace R&D Center, Hanwha Aerospace) ;
  • Kim, Hong-Kyu (Agency for Defense Development)
  • 오윤석 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 채정민 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 류호림 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 한윤수 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 안종기 (한화에어로스페이스 항공우주연구소 가스터빈개발팀) ;
  • 손명숙 (한화에어로스페이스 항공우주연구소 가스터빈개발팀) ;
  • 김홍규 (국방과학연구소)
  • Received : 2019.11.18
  • Accepted : 2019.12.06
  • Published : 2019.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

Electron beam physical vapor deposition (EBPVD) is a conventional method to fabricate thermal barrier coating (TBC) of high temperature airfoil engine parts, such as blade etc. for its high temperature structural stability from the nature of columnar growth behavior. For the high quality of TBC by EBPVD, the structural factors, such as growth behavior, thickness uniformity and so on, should be managed to obtain the coating which satisfied the required specifications of usable level of mechanical and thermal properties. In this study, the growth behavior and structure variations of 7YSZ (7 wt% yttria stabilized zirconia) coatings with different configurational deposition parameters for the specimens which have turbine blade shape mock-up were investigated. Growth behavior of coatings were studied by comparing computational modeling of evaporation behavior with actual deposition process using e-beam source.

전자빔 물리기상증착기술(EBPVD)은 주상형 성장거동과 같이 고온에서의 구조 안정성에 기여할 수 있는 특성으로 인해 터빈블레이드 등과 같은 항공기 엔진 고온부품의 열차폐 코팅(TBC) 제조기술로 개발되어 상용화된 기술이다. 전자빔 증착으로 열·기계적 특성이 상용화 가능한 수준에 만족하는 고품질 열차폐 코팅제조를 위해서는 성장거동, 균일두께형성 등과 같은 구조적 요소의 제어가 반드시 수반되어야 한다. 본 연구에서는 실품형상에 근사한 터빈 블레이드 mock-up에 대한 기하학적 코팅인자 조건에 따른 7YSZ(7 wt% 이트리아 안정화 지르코니아) 열차폐 코팅의 성장거동과 구조변화를 고찰하였으며, 전산모사 기법을 활용한 기하학적 코팅인자 조건에 따른 코팅성장거동 모델링을 수행하여 실제 코팅결과와 비교하였다.

Keywords

References

  1. R.T. Wu, M. Osawa, T. Yokokawa, K. Kawagishi and H. Harada, "Degradation mechanisms of an advanced jet engine service-retired TBC component", J. of Solid Mechanics and Materials Engineering 4 (2010) 119. https://doi.org/10.1299/jmmp.4.119
  2. R.A. Miller, "Thermal barrier coatings for aircraft engines history and directions", J. Therm. Spray Technol. 6 (1997) 35. https://doi.org/10.1007/BF02646310
  3. E. Lugscheider, C. Barimani and G. Dopper, "Ceramic thermal barrier coatings deposited with the electron beam-physical vapour deposition technique", Surf. Coat. Technol. 98 (1998) 1221. https://doi.org/10.1016/S0257-8972(97)00149-7
  4. U. Schulz, K. Fritscher and M. Peters, "EB-PVD $Y_2O_3$- and $CeO_2Y_2O_3$-stabilized zirconia thermal barrier coatings-crystal habit and phase composition", Surf. Coat. Technol. 82 (1996) 259. https://doi.org/10.1016/0257-8972(95)02727-0
  5. U. Schulz, "Phase transformation in EB-PVD yttria partially stabilized zirconia thermal barrier coatings during annealing", J. Am. Ceram. Soc. 83 (2000) 904. https://doi.org/10.1111/j.1151-2916.2000.tb01292.x
  6. J.R. Nicholls, K.J. Lawson, A. Johnstone and D.S. Rickerby, "Methods to reduce the thermal conductivity of EB-PVD TBCs", Surf. Coat. Technol. 151-152 (2002) 383. https://doi.org/10.1016/S0257-8972(01)01651-6
  7. J. Singh and D.E. Wolfe, "Architecture of thermal barrier coatings produced by electron beam-physical vapor deposition (EB-PVD)", J. Mater. Sci. 37 (2002) 3261. https://doi.org/10.1023/A:1016187101616
  8. B.K. Jang and H. Matsubara, "Influence of rotation speed on microstructure and thermal conductivity of nanoporous zirconia layers fabricated by EB-PVD", Scr. Mater. 52 (2005) 553. https://doi.org/10.1016/j.scriptamat.2004.12.003
  9. M. Matsumoto, K. Wada, N. Yamaguchi, T. Kato and H. Matsubara, "Effects of substrate rotation speed during deposition on the thermal cycle life of thermal barrier coatings fabricated by electron beam physical vapor deposition", Surf. Coat. Technol. 202 (2008) 3507. https://doi.org/10.1016/j.surfcoat.2007.12.035
  10. K. Wada, N. Yamaguchi and H. Matsubara, "Effect of substrate rotation on texture evolution in $ZrO_2$-4 mol.% $Y_2O_3$ layers fabricated by EB-PVD", Surf. Coat. Technol. 191 (2005) 367. https://doi.org/10.1016/j.surfcoat.2004.02.008
  11. U. Schulz, K. Fritscher, C. Leyens and M. Peters, "Influence of processing on microstructure and performance of electron beam physical vapor deposition (EB-PVD) thermal barrier coatings", J. Eng. Gas Turbines Power 124 (2002) 229. https://doi.org/10.1115/1.1447238
  12. U. Schulz, S.G. Terry and C.G. Levi, "Microstructure and texture of EB-PVD TBCs grown under different rotation modes", Mater. Sci. Eng. A360 (2003) 3199.
  13. A. Flores Renteria, B. Saruhan, U. Schulz, H.-J. Raetzer-Scheibe, J. Haug and A. Wiedenmann, "Effect of morphology on thermal conductivity of EB-PVD PYSZ TBCs", Surf. Coat. Technol. 201 (2006) 2611. https://doi.org/10.1016/j.surfcoat.2006.05.003
  14. U. Schulz, S.G. Terry and C.G. Levi, "Microstructure and texture of EB-PVD TBCs grown under different rotation modes", Mater. Sci. Eng. A360 (2003) 319.
  15. Y. Tamarin, "Protective Coatings for Turbine Blades", 1st ed., Y. Tamarin, Ed. (ASM International, Ohio, 2002) p. 161.
  16. U. Schulz, H.J. Ratzer-Scheibe, B. Saruhan and A.F. Renteria, "Thermal conductivity issues of EB-PVD thermal barrier coatings," Mat.-wiss. u. Werkstofftech. 38 (2007) 659. https://doi.org/10.1002/mawe.200700189
  17. M. Ohring, "Materials Science of Thin Films", 2nd ed. (Academic Press, San Diego, 2002) p. 106.