Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
권호 표지

Fracture Behavior of Ceramic Coatings Subjected to Thermal Shock

열충격에 의한 세라믹코팅재의 파괴거동

  • Han, Ji-Won (Department of Mechanical Engineering, Hoseo University)
  • 한지원 (호서대학교 기계공학과)
  • Published : 2003.12.01
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Abstract

An experimental study was conducted to develop and understanding of fracture behavior of ceramic thermal barrier coating when subjected to a thermal shock loading. The thermal loading was applied using a 1.5kW $CO_2$ laser. In the experiments, beam-shaped specimens were subjected to a high heat flux for 4sec and cooling of 7sec in air. The interface crack length was increased as the crack density, the surface pre-crack legth and the coating thickness were increased. The center surface crack length was increased as the maximum surface temperature got higher and the surface pre-crack length for shorter.

Keywords

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