The effect of porosity and microcracking on the thermomechanical properties of cordierite
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
- BAM Federal Inst. for Materials Research and Testing, Berlin (Germany)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division; Cummins Inc., Columbus, IN (United States). Ceramics and Catalyst Technology
- Cummins Inc., Columbus, IN (United States). Ceramics and Catalyst Technology
The effect of porosity and microcracking on the mechanical properties (strength, fracture toughness, Young’s modulus, and fracture energy) and thermal expansion of diesel particulate filter (DPF) grade cordierite materials has been investigated. A method to deconvolute the effect of porosity and microcracking on Young’s modulus is proposed. In addition, the microcrack density and the pore morphology factor are calculated by applying a micromechanical differential scheme. The values of the investigated mechanical properties are shown to decrease with an increase in porosity, but the thermal expansion values are insensitive to porosity. The variation in mechanical properties as a function of porosity leads to distinct porosity dependence of thermal shock resistance for crack initiation and crack propagation for DPF grade synthetic cordierite.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1325413
- Journal Information:
- Journal of the European Ceramic Society, Vol. 35, Issue 16; ISSN 0955-2219
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
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