Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Evaluation of Thermal Durability of Thermal Barrier Coating and Change in Mechanical Behavior

  • Lee, Dong Heon (School of Mechanical Systems Engineering, Kookmin University) ;
  • Kang, Nam Kyu (School of Mechanical Systems Engineering, Kookmin University) ;
  • Lee, Kee Sung (School of Mechanical Systems Engineering, Kookmin University) ;
  • Moon, Heung Soo (Research and Development Center, Sewon Hardfacing Co. Ltd.) ;
  • Kim, Hyung Tae (Engineering Ceramics Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Chul (School of Mechanical Systems Engineering, Kookmin University)
  • Received : 2017.05.19
  • Accepted : 2017.06.23
  • Published : 2017.07.31
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Abstract

This study investigates changes in the mechanical behavior, such as changes in indentation load-displacement curve, wear resistance and contact fatigue resistance of thermal barrier coatings (TBCs) by thermal cycling test and thermal shock test. Relatively dense and porous TBCs on nickel-based bondcoat/superalloy are prepared; the highest temperature applied during thermal durability test is $1350^{\circ}C$. The results indicate that the porous TBCs have relatively longer lifetime during thermal cycling and thermal shock tests, while denser TBCs have relatively higher wear and contact fatigue resistance. The mechanical behavior is influenced by sintering of the TBCs by exposure to high temperature during tests.

Keywords

References

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