Evaluation of Air Permeation Behavior of Porous SiC Ceramics Synthesized by Oxidation‐Bonding Technique |
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| Authors: | Atanu Dey Nijhuma Kayal Omprakash Chakrabarti Murilo D M Innocentini Welton S Chacon José R Coury |
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| Affiliation: | 1. Central Glass and Ceramic Research Institute, CSIR, , Kolkata, 700 032 West Bengal, India;2. Course of Chemical Engineering, University of Ribeir?o Preto (UNAERP), , 14096‐900 Ribeir?o Preto, SP, Brazil;3. Department of Chemical Engineering, Federal University of S?o Carlos (UFSCar), , 13565‐905 S?o Carlos, SP, Brazil |
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| Abstract: | Porous SiC ceramics were synthesized by oxidation bonding of compacts of commercial α‐SiC powder at 1300°C. Different volume fractions of petroleum coke powder were used for variation of porosity of ceramics from 36% to 56%. The material exhibited variations of pore size from 3 to 15 μm, flexural strength from 5.5 to 29.5 MPa, and elastic modulus from 3.3 to 27.6 GPa. Air permeation behavior was studied at 26–650°C. At room temperature Darcian (k1) and non‐Darcian (k2) permeability parameters vary from 1.64 to 18.42 × 10?13 m2 and 0.58 to 2.95 × 10?7 m, respectively. Temperature dependence of permeability was explained from structural changes occurring during test conditions. |
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