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Durability Evaluation of Thermal Barrier Coating (TBC) According to Growth of Thermally Grown Oxide (TGO)

TGO 성장을 고려한 열차폐코팅의 내구성평가

  • Song, Hyun Woo (School of Mechanical Engineering, Sungkyunkwan Univ.) ;
  • Moon, Byung Woo (School of Mechanical Engineering, Sungkyunkwan Univ.) ;
  • Choi, Jae Gu (School of Mechanical Engineering, Sungkyunkwan Univ.) ;
  • Choi, Won Suk (School of Mechanical Engineering, Sungkyunkwan Univ.) ;
  • Song, Dongju (School of Mechanical Engineering, Sungkyunkwan Univ.) ;
  • Koo, Jae-Mean (School of Mechanical Engineering, Sungkyunkwan Univ.) ;
  • Seok, Chang-Sung (School of Mechanical Engineering, Sungkyunkwan Univ.)
  • 송현우 (성균관대학교 기계공학부) ;
  • 문병우 (성균관대학교 기계공학부) ;
  • 최재구 (성균관대학교 기계공학부) ;
  • 최원석 (성균관대학교 기계공학부) ;
  • 송동주 (성균관대학교 기계공학부) ;
  • 구재민 (성균관대학교 기계공학부) ;
  • 석창성 (성균관대학교 기계공학부)
  • Received : 2014.03.19
  • Accepted : 2014.10.21
  • Published : 2014.12.01

Abstract

The thermal barrier coating (TBC) applied to a gas turbine can be damaged by repeated thermal fatigue during operation, so an evaluation of its durability is needed. Thermally grown oxide (TGO) is generated inside the TBC in a high-temperature environment. The growth of TGO is known to be the main cause of damage to the TBC. Therefore, the durability of TBC should be evaluated according to the growth of TGO. In this research, Kim et al.'s work on the growth of TGO with aging was used as a basis for finite element analysis. The relationship between stress and aging was derived from the finite element analysis results. The durability of the TBC with aging was evaluated through a comparison between the results of the finite element analysis and a bond strength test.

Keywords

Thermal Barrier Coating;Thermally Grown Oxide;Durability Evaluation;Finite Element Analysis

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

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