Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Thermal Shock Resistance of Bilayered YSZ Thermal Barrier Coating

  • Lee, Dong Heon (Department of Automotive Engineering, Kookmin University) ;
  • Kim, Tae Woo (School of Mechanical Engineering, Kookmin University) ;
  • Lee, Kee Sung (School of Mechanical Engineering, Kookmin University) ;
  • Kim, Chul (School of Mechanical Engineering, Kookmin University)
  • Received : 2018.05.18
  • Accepted : 2018.07.15
  • Published : 2018.09.30
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Abstract

This study investigate changes in mechanical behaviors such as indentation load-displacement and hardness of thermal barrier coatings (TBCs) using cycling of thermal shock test. Relatively dense and porous TBCs on nickel-based bondcoat/super alloy are prepared using different starting granules, 204C-NS and 204NS commercial powers, and the effect of double layers of 204C-NS on 204NS and 204NS on 204C-NS are investigated. The highest temperature applied during thermal shock test is $1100^{\circ}C$ and the maximum number of cycles is 1,200. The results indicate that bilayered TBC showed a relatively mechanically resistant property during thermal shock cycles and that the mechanical behavior is influenced by the microstructure of TBCs by exposure to high temperature during tests or different starting granules.

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References

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