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High Temperature Fatigue in Ceramic Honeycomb Catalyst Supports
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English
Abstract
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.
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Authors
Citation
Helfinstine, J. and Gulati, S., "High Temperature Fatigue in Ceramic Honeycomb Catalyst Supports," SAE Technical Paper 852100, 1985, https://doi.org/10.4271/852100.Also In
References
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