This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Long-Term Durability of Ceramic Honeycombs for Automotive Emissions Control
Annotation ability available
Sector:
Language:
English
Abstract
Ceramic honeycomb structures have been used successfully as catalyst supports in gasoline-powered vehicles for the past ten years. They are currently the leading candidate for trapping and oxidizing the carbonaceous particulate emissions in diesel-powered vehicles. In both of these applications the long term durability of the ceramic substrate is of prime importance. This, in turn, depends on the physical properties of cellular structure, cyclic nature of service loads and design of the mounting assembly.
This paper examines the nature and dependence of both the mechanical and thermal stresses in the substrate on its geometry, properties, mounting parameters, and the operating conditions. It also compares the observed failure modes with those predicted by the theory. The paper concludes with a set of recommendations for optimal systems design and acceptable operating conditions which will promote the long term durability of the ceramic substrate.
Recommended Content
Topic
Citation
Gulati, S., "Long-Term Durability of Ceramic Honeycombs for Automotive Emissions Control," SAE Technical Paper 850130, 1985, https://doi.org/10.4271/850130.Also In
References
- Howitt J. S. Sekella T. C. “Flow Effects in Monolithic Honeycomb Catalytic Converters” SAE Paper 740244 February 1974
- Howitt J. S. “Thin Wall Ceramics as Monolith Catalyst Supports” SAE Paper 800082 February 1980
- Howitt J. S. Montierth M. R. “Cellular Ceramic Diesel Particulate Filter” SAE Paper 810114 February 1981
- Wade W. R. White J. E. Florek J. J. “Diesel Particulate Trap Regeneration Techniques” SAE Paper 810118 February 1981
- Mogaka Z. N. Wong V. W. Shahed S. M. “Performance and Regeneration Characteristics of a Cellular Ceramic Diesel Particulate Trap” SAE Paper 820272 February 1982
- Lachman I. M. Bagley R. D. Lewis R. M. “Thermal Expansion of Extruded Cordierite Ceramics” Ceramic Bulletin 60 2 February 1981
- Coble R. L. Kingery W. D. “Effect of Porosity on Physical Properties of Sintered Alumina” J. Am. Ceram. Soc. 39 11 November 1956
- Standard Test Method for Young's Modulus, Shear Modulus, and Poisson's Ratio for Glass and Glass-Ceramics by Resonance ASTM Designation C623-71
- Gulati S. T. “Effects of Cell Geometry on Thermal Shock Resistance of Catalytic Monoliths” SAE Paper 750171 February 1975
- Gulati S. T. Merry R. P. “Design Considerations for Mounting Material for Ceramic Wall-Flow Diesel Filters” SAE Paper 840074 February 1984
- Gulati S. T. Pujari V. K. “Mechanical Integrity of Ceramic Monolithic Converters” SAE Paper 811324 November 1981
- ANSYS Swanson Systems Elizabeth, Pa
- Gulati S. T. “Thermal Stresses in Ceramic Wall Flow Diesel Filters” SAE Paper 830079 February 1983
- Montierth M. R. “Fuel Additive Effect on Diesel Particulate Filters” SAE Paper 840073 February 1984
- Helfinstine J. D. “Adding Static and Dynamic Fatigue Effects Directly to Weibull Distribution” J. of Am. Cerm. Soc. 63 January 1980
- Evans A. G. “Slow Crack Growth in Brittle Materials Under Dynamic Loading Conditions” Int. J. Fracture 10 February 1974