Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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Design of Microstructure by Evaluating the Effect of Thermal Barrier Coating's Microstructure on TGO Interface Stress

열차폐코팅의 미세구조가 TGO 계면 응력에 미치는 영향 평가를 통한 미세구조 형상 설계

  • Kim, Damhyun (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Park, Kibum (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Wee, SungUk (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Kim, Keekeun (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Park, Soo (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Seok, Chang-Sung (Department of Mechanical Engineering, Sungkyunkwan University)
  • 김담현 (성균관대학교 기계공학과) ;
  • 박기범 (성균관대학교 기계공학과) ;
  • 위성욱 (성균관대학교 기계공학과) ;
  • 김기근 (성균관대학교 기계공학과) ;
  • 박수 (성균관대학교 기계공학과) ;
  • 석창성 (성균관대학교 기계공학부)
  • Received : 2020.06.01
  • Accepted : 2020.08.14
  • Published : 2020.10.05
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Abstract

Thermal barrier coating(TBC) applied to fighter and turbine engines is a technology that improves the durability of core parts by lowering the surface temperature of base material. The thermal stress caused by mis-match of the coefficient of thermal expansion between the top coating and the TGO interface is the main cause of TBC breakage. Since the thermal stress is dependent on the microstructure of the TBC, designing microstructure of TBC can improve the durability as well as lower the thermal stress. In this study, the effect of coating thickness, volume of porosity and vertical cracking on the thermal stress was analyzed through finite element analysis. Through the analysis results, a design range of a microstructure that can improve the durability of thermal barrier coating by lowering thermal stress is proposed.

Keywords

References

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