Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Top Coating Design Technique for Thermal Barrier of Gas Turbine

가스터빈의 열차폐용 탑코팅 설계기술

  • Koo, Jae-Mean (School of Mechanical Engineering, Sungkyunkwan Univ.) ;
  • Lee, Si-Young (Graduate School of Mechanical Engineering, Sungkyunkwan Univ.) ;
  • Seok, Chang-Sung (School of Mechanical Engineering, Sungkyunkwan Univ.)
  • 구재민 (성균관대학교 기계공학부) ;
  • 이시영 (성균관대학교 기계공학과 대학원) ;
  • 석창성 (성균관대학교 기계공학부)
  • Received : 2013.03.06
  • Accepted : 2013.07.03
  • Published : 2013.08.01
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Abstract

Thermal barrier coating (TBC) is used to protect substrates and extend the operating life of gas turbines in power plant and aeronautical applications. The major causes of failure of such coatings is spallation, which results from thermal stress due to a thermal expansion coefficient mismatch between the top coating and the bond coating layers. In this paper, the effects of the material properties and the thickness of the top coating layer on thermal stresses were evaluated using the finite element method and the equation for the thermal expansion coefficient mismatch stress. In addition, we investigated a design technique for the top coating whereby thermal resistance is exploited.

Keywords

References

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  1. Design Technique for Improving the Durability of Top Coating for Thermal Barrier of Gas Turbine vol.31, pp.1, 2014, https://doi.org/10.7736/KSPE.2014.31.1.15
  2. Durability Evaluation of Thermal Barrier Coating (TBC) According to Growth of Thermally Grown Oxide (TGO) vol.38, pp.12, 2014, https://doi.org/10.3795/KSME-A.2014.38.12.1431
  3. Life prediction of thermal barrier coating considering degradation and thermal fatigue vol.17, pp.2, 2016, https://doi.org/10.1007/s12541-016-0031-y