Experimental Estimation of Thermal Durability in Ceramic Catalyst Supports for Passenger Car

승용차용 세라믹 촉매 담체의 열적 내구성의 실험적 평가

  • 백석흠 (동아대학교 대학원 기계공학과) ;
  • 김성용 (강원대학교 산업대학원 자동차공학과) ;
  • 승삼선 (강원대학교 자동차공학과) ;
  • 양협 (강원대학교 자동차공학과) ;
  • 주원식 (동아대학교 기계공학과) ;
  • 조석수 (강원대학교 자동차공학과)
  • Published : 2007.12.01


Ceramic honeycomb structures have performed successfully as catalyst supports for meeting hydrocarbon, carbon monoxide and nitrous emissions standards for gasoline-powered vehicles. Three-way catalyst converter has to withstand high temperature and thermal stress due to pressure fluctuations and vibrations. Thermal stress constitutes a major portion of the total stress which the ceramic catalyst support experiences in service. In this study, temperature distribution was measured at ceramic catalyst supports. Thermal durability was evaluated by power series dynamic fatigue damage model. Radial temperature gradient was higher than axial temperature gradient. Thermal stresses depended on direction of elastic modulus. Axial stresses are higher than tangential stresses. Tangential and axial stresses remained below thermal fatigue threshold in all engine operation ranges.


Ceramic Catalyst Supports;CTE(Coefficient of Thermal Expansion);MOR(Modulus of Rupture);Thermal Durability;Thermal Stress;Threshold Stress


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