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Monolithic Metal Oxide Thin-Wall Substrates with Closed and Open Cells: Optimal Designs by Theoretical Modeling and Experiment
Technical Paper
2001-01-0931
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
Recently, ASMT has developed a process of making monolithic metal oxide thin-wall structures from mechanically assembled metal preforms, whose shape and internal configuration are retained in the (oxidation) process. Because metallic designs can be extremely diverse, the same varieties of designs are now possible in metal oxide ceramics. In particular, some unique metallic designs such as spiral winding structures (formed from flat and corrugated layers) with either closed or open cells have been realized for the first time in ceramics, such as hematite Fe2O3 and titania (rutile) TiO2. In order to optimize these new ceramic designs, we have developed a theoretical model of layer distribution of mechanical stresses under external uniform radial pressure and of thermal stresses under typical heating/cooling regimes. The stress distribution is determined by various parameters, both structural (cell size and geometry, wall thickness, number of layers, etc.) and material (tensile wall strength, Young's modulus, thermal expansion coefficient, etc.). The analytical formalism and computational program are highlighted. Model results are presented for a variety of hematite and titania substrates, having closed or open cell structure, a cell density from 200 to 1000 cpsi, and wall thickness from 1 to 5 mils. Recommendations on optimal designs are given and supported by relevant experimental data. Automotive applications of new metal oxide thin-wall substrates are discussed.
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Authors
Citation
Shustorovich, E., Shustorovich, V., and Solntsev, K., "Monolithic Metal Oxide Thin-Wall Substrates with Closed and Open Cells: Optimal Designs by Theoretical Modeling and Experiment," SAE Technical Paper 2001-01-0931, 2001, https://doi.org/10.4271/2001-01-0931.Also In
Advanced Catalytic Converters and Substrates for Gasoline Emission Systems
Number: SP-1573; Published: 2001-03-05
Number: SP-1573; Published: 2001-03-05
References
- Solntsev K. A. Shustorovich E. Buslaev Yu. A. Proceedings of the Russian Academy of Sciences Ser. Chem.
- Lange's Handbook of Chemistry Dean J.A. 14th McGraw-Hill New York 1992
- Lackey W. J. et al. “Ceramic Coatings for Advanced Heat Engines - A Review and Projections” Adv. Cer. Mat. 2 1987 24 30
- Gulati S. T. “New Developments in Catalytic Converter Durability” Catalysis and Automotive Pollution Control Crucq A. Elsevier 1991 481 507
- Gulati S. T. Hawker P. N. Cooper B. J. Douglas J.M.K. Winterborn D. J. W. “Optimization of Substrate/Washcoat Interaction for Improved Catalyst Durability” SAE Paper No. 910372 1991
- Shustorovich V. “Strength of Ring-Shaped Parts for Metallurgical Equipment” Machinery Publishing Moscow 1976 200
- Blake A. “Practical Stress Analysis in Engineering Design” Marcel Dekker 1990
- Gulati S.T. Chen D.K.S. “Isostatic Strength of Porous Cordierite Ceramic Monolith” SAE Paper No. 910375 1991
- Collins J. A. “Failure of Materials in Mechanical Design: Analysis, Prediction, Prevention” 2nd Wiley New York 1993 354
- Hunt H. E. M. “The Mechanical Strength of Ceramic Honeycomb Monoliths as Determined by Simple Experiments” Trans IChemE 71 May 1993 257 265
- Wong H. Y. “Handbook of Essential Formulae and Data on Heat Transfer for Engineers” Longman Group 1977
- Stroom P. D. Merry R. P. Gulati S. T. “Systems Approach to Packaging Design for Automotive Catalytic Converters” SAE Paper No. 900500 1990
- Gogotski G.A. “Deformational Behavior of Ceramics” J. Europ. Cer. Soc. 7 1991 87 92