승용차용 세라믹 촉매 담체의 열적 내구성의 실험적 평가

백석흠; 승삼선; 양협; 주원식; 조석수; 김성용

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승용차용 세라믹 촉매 담체의 열적 내구성의 실험적 평가

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

백석흠;
승삼선;
양협;
주원식;
조석수;
외 1명

초록

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.

키워드

Ceramic Catalyst Supports(세라믹 촉매 담체); CTE(Coefficient of Thermal Expansion:열팽창 계수); MOR(Modulus of Rupture: 파단계수); Thermal Durability(열적 내구성); Thermal Stress(열응력); Threshold Stress(하한계 응력); Ceramic Catalyst Supports(세라믹 촉매 담체); CTE(Coefficient of Thermal Expansion:열팽창 계수); MOR(Modulus of Rupture: 파단계수); Thermal Durability(열적 내구성); Thermal Stress(열응력); Threshold Stress(하한계 응력)

제목: 승용차용 세라믹 촉매 담체의 열적 내구성의 실험적 평가

제목 (타언어): Experimental Estimation of Thermal Durability in Ceramic Catalyst Supports for Passenger Car

저자: 백석흠; 승삼선; 양협; 주원식; 조석수; 김성용

발행일: 2007-12

유형: Y

저널명: 대한기계학회논문집 A

권: 31

호: 12

페이지: 1157 ~ 1164