Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Thermal shock characteristics of FGM for gas turbine blade

가스터빈 날개용 경사기능재료의 열충격 특성

  • Lim, Jae-Kyoo (Automotive New Technology Research Center, Dept.of Mechanical Engineering, Chonbuk National University) ;
  • Song, Jun-Hee (Automotive New Technology Research Center, Dept.of Mechanical Engineering, Chonbuk National University) ;
  • Kim, You-Jig (Automotive New Technology Research Center, Dept.of Mechanical Engineering, Chonbuk National University)
  • 임재규 (전북대학교 기계공학부, 자동차 신기술연구소) ;
  • 송준희 (전북대학교 기계공학부, 자동차 신기술연구소) ;
  • 김연직 (전북대학교 기계공학부, 자동차 신기술연구소)
  • Published : 1998.01.01
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Abstract

The development of a new material which should be continuously usable under severe environment of very high temperature has been urgently requested. The conventional thermal barrier coating(TBC) is a two layer coating, but a composition and a microstructure of functionally graded material(FGM) are varied continuously from place to place in ways designed to provide it with the maximum function of mitigating the induced thermal stress. The purpose of this study is to evaluate the heat-resistant characteristics by thermal shock of laser and furnace heating. The fracture behaviors of non-FGM(NFGM) and FGM were investigated based on acoustic emission(AE) technique during thermal shock test. Therefore, it can be concluded that FGM gives higher thermal resistance compared to NFGM by AE signal and fracture surface analysis.

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