This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
High Temperature Fatigue in Ceramic Honeycomb Catalyst Supports
Annotation ability available
Sector:
Language:
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.
Recommended Content
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
- Gulati S. T. Helfinstine, J. D. “High Temperature Fatigue in Ceramic Wall-Flow Diesel Filters” SAE Technical Paper 850010 . Presented at the International Congress & Exposition Detroit, Michigan 1985
- Helfinstine, J. D. “Delayed Failure or Subcritical Crack Growth in Glass” Proc. 28th Symposium on the Art of Glassblowing Cherry Hill, N.J. 1983
- Evans, A. G. “Slow Crack Growth in Brittle Materials Under Dynamic Loading Conditions” Int. J. Fract. 10 2 1974 251 9
- Helfinstine, J. D. “Adding Static and Dynamic Fatigue Effects Directly to the Weibull Distribution” J. Amer. Cer. Soc. 63 1980 113
- Michalske T. A. Freiman, S. W. “A Molecular Mechanism for Stress Corrosion in Vitreous Silica” J. Am. Ceram. Soc. 66 4 284 8 1983
- Freiman, S. W. White, G. S. Fuller, E. R. Jr. “Environmentally Enhanced Crack Growth in Soda-Lime Glass” J. Am. Ceram. Soc. 68 3 108 12 1985
- Weibull, W. “A Statistical Distribution Function of Wide Applicability” J. App. Mech. 1951 293 7