Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Analysis of Thermal Oxide Behavior with Isothermal Degradation of TBC Systems Applied to Single Crystal Superalloy

단결정 초내열합금에 적용된 열차폐코팅의 등온열화에 따른 산화물 거동분석

  • Kim, K. (Department of Mechanical Engineering, Sungkyunkwan University) ;
  • Wee, S. (Department of Mechanical Engineering, Sungkyunkwan University) ;
  • Choi, J. (Department of Mechanical Engineering, Sungkyunkwan University) ;
  • Kim, D. (Department of Mechanical Engineering, Sungkyunkwan University) ;
  • Song, H. (Department of Mechanical Engineering, Sungkyunkwan University) ;
  • Lee, J. (Department of Mechanical Engineering, Sungkyunkwan University) ;
  • Seok, C.S. (Department of Mechanical Engineering, Sungkyunkwan University) ;
  • Chung, E.S. (Research & Development Team, Korea Lost-Wax Co., LTD) ;
  • Kwon, S.H. (Research & Development Team, Korea Lost-Wax Co., LTD)
  • 김기근 (성균관대학교 기계공학과) ;
  • 위성욱 (성균관대학교 기계공학과) ;
  • 최재구 (성균관대학교 기계공학과) ;
  • 김담현 (성균관대학교 기계공학과) ;
  • 송현우 (성균관대학교 기계공학과) ;
  • 이정민 (성균관대학교 기계공학과) ;
  • 석창성 (성균관대학교 기계공학과) ;
  • 정의석 (한국로스트왁스 연구개발팀) ;
  • 권석환 (한국로스트왁스 연구개발팀)
  • Received : 2019.03.13
  • Accepted : 2019.08.14
  • Published : 2019.08.31
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Abstract

In the field of combined cycle power generation, thermal barrier coating(TBC) protects the super-heat-resistant alloy, which forms the core component of the gas turbine, from high temperature exposure. As the turbine inlet temperature(TIT) increases, TBC is more important and durability performance is also important when considering maintenance cost and safety. Therefore, studies have been made on the fabrication method of TBC and super-heat-resistant alloy in order to improve the performance of the TBC. In recent years, due to excellent properties such as high temperature creep resistance and high temperature strength, turbine blade material have been replaced by a single crystal superalloy, however there is a lack of research on TBC applied to single crystal superalloy. In this study, to understand the isothermal degradation performance of the TBC applied to the single crystal superalloy, isothermal exposure test was conducted at various temperature to derive the delamination life. The growth curve of thermally grown oxide(TGO) layer was predicted to evaluate the isothermal degradation performance. Also, microstructural analysis was performed by scanning electron microscope(SEM) and energy dispersive X-ray spectroscopy (EDS) to determine the effect of mixed oxide formation on the delamination life.

Keywords

References

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