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High Temperature Fatigue in Ceramic Honeycomb Catalyst Supports
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 01, 1985 by SAE International in United States
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The high temperature dynamic fatigue data for the catalyst support composition, EX-20, 400/6.8, are presented. These data indicate that the fatigue effects are more severe when the substrate temperature in the peripheral region is near 200°C. The major impact of high temperature fatigue is the slow degradation of substrate’s initial strength while in service. Such a degradation must be taken into account in designing the total converter package to meet life requirements. For the EX-20, 400/6.8 substrate, approximately 50% of its initial strength is available to withstand the combined stresses from mechanical, thermal, and vibrational loads in service. At temperatures well above 200°C, the available design strength can be as high as 65% of substrate’s initial strength. The fatigue theory, the measurement technique, and the application of fatigue data to long term durability of cordierite substrates are discussed.
CitationHelfinstine, J. and Gulati, S., "High Temperature Fatigue in Ceramic Honeycomb Catalyst Supports," SAE Technical Paper 852100, 1985, https://doi.org/10.4271/852100.
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