Effect of Oxidation of Bond Coat on Failure of Thermal Barrier Coating

Bond Coat의 산화가 Thermal Barrier Coating의 파괴에 미치는 영향

  • 최동구 (한국과학기술원 재료공학과) ;
  • 최함메 (한국과학기술원 재료공학과) ;
  • 강병성 (한국과학기술원 재료공학과) ;
  • 최원경 (한국과학기술원 재료공학과) ;
  • 최시경 (한국과학기술원 재료공학과) ;
  • 김재철 (충남대학교 재료공학과) ;
  • 박영규 (충남대학교 재료공학과) ;
  • 김길무 (충남대학교 재료공학과)
  • Published : 1997.01.01


The oxidation behavior of the NiCrAlY bond coat and thermal fatigue failure in the plasma-sprayed thermal barrier coating system, ZrO2.8wt%Y2O3 top coat/Ni-26Cr-5Al-0.5Y bond coat/Hastelloy X superalloy substrate, in commercial use for finned segment of gas turbine burner were investigated. The main oxides formed in the bond coat were NiO, Cr2O3, and Al2O3. It divided the oxide distribution at this interface into two types whether an Al2O3 thin layer existed beneath ZrO2/bond coat interface before operation at high temperature or not. While a continuous layer of NiO was formed mainly in the region where the Al2O3 thin layer was present, the absence of it resulted in the formation of mixture of Cr2O3 and Al2O3 beneath NiO layer. Analyses on the fracture surface of specimen spalled by thermal cycling showed that spalling occurred mainly along the ceram-ic coat near ZrO2/bond coat oxide layer interface, but slightly in the oxide layer region.



  1. Mater. Sci. Technol. v.2 Properties of Thermal Barrier Coatings A. Bennett
  2. J. Mater. Sci. v.27 Alumina Scale Growth at Zirconia-MCrAIY Interface: A Microstructure Study L. Lelait;S. Alperine;R Mevrel
  3. Thin Solid Films v.182 Two-Layer Thermal Barrier Coatings:Effects of Composition and Temperature on Oxidation Behavior and Failure S. Stecura
  4. Proc. of International Thermal Spray Conference Investigation on the Metal-Ceramic Inerface of Plasma Sprayed Thermal Barrier Coatings L. Bertamini;S. Materra;S. Sturlese
  5. Thin. Solid. Films v.172 Thermal Cyclic Response of Yttria-Stabilized Zirconia/CoNiCrAIY Thermal Barrier Coatings B.C. Wu;E. Chang;S.F. Chang;C.H. Chao
  6. Thin Solid Films v.95 Failure Mechanisms of Thermal Barrier Coatings Exposed to Elevated Temperatures R.A. Miller;C.E. Lowell
  7. Surf. Coat. Technol. v.36 Oxidation Behaviour of Ion-Implanted NiCrAl J.L. Cocking;J.A. Sprague;J.R. Reed
  8. Proc. of International Thermal Spray Conference Ceria Precipitation and Phase Stability in Zirconia Based Thermal Barrier Coatings J. Thornton;A. Majumdar
  9. Mater. Sci. Eng. v.A111 Microstructure, Properties and Failure Analysis of ZrO₂-8wt%Y₂O₃/(Co₂Ni)-Cr-Al-Y thermal Barrier Coatings B.C. Wu;E. Chang;D. Tu;S.L. Wang
  10. Am. Ceram. Soc. Bull. v.60 no.5 Degradation of a Two-Layer Thermal Barrier Coating under Thermal Cycling R.D. Maier;C.M. Schcuermann;C.W. Andrews
  11. J. Vac. Sci. Technol. v.A9 no.4 Zirconia/Pack-Aluminized Co-29Cr-6Al-1Y Thermal Barrier Coatings S.F. Chang;C.H. Chao;B.C. Wu;R.Q. Leu;E. Chang
  12. J. Electrochem. Soc. v.118 no.11 Oxidation of Ni-Cr-Al Alloys Between 1000℃ and 1200℃ C.S. Giggins;F.S. Pettit
  13. Surf. Coat. Technol. v.36 Void Formation and Suppression during High Temperature Oxidation of MCrAIY-Type Coatings V. Provenzano;K. Sadananda;N.P. Louat;J.R. Reed
  14. Surf. Coat Technol v.43;44 Thermal Barrier Coating Life and Isothermal Oxidation of Low-Pressure Plasma-Sprayed Bond Coat Alloys W.J. Brindley;R.A. Miller
  15. Thin Solid Films v.136 Advanced Thermal Barrier System Bond Coatings for Use on Nickel-Cobalt-and Iron-based Alloy Substrates S. Stecura
  16. Thin Solid Films v.127 Thermal Barrier Coating for Turbine Airffoils T.E. Strangman
  17. Proc. of International Thermal Spray Conference Thermal Barrier Coating Design for Gas Turbines M. Takahashi;Y. Itoh;M. Miyazaki