Studies on processing of layered oxide-bonded porous sic ceramic filter materials
IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata
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| Title |
Studies on processing of layered oxide-bonded porous sic ceramic filter materials
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| Creator |
Dey, Atanu
Kayal, Nijhuma Chakrabarti, Omprakash Fortes, Nilo M Innocentini, Murilo D M Molla, Atiar Rahaman Sinha, Prasanta Dalui, Srikanta |
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| Subject |
Engineering Materials
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| Description |
Oxide-bonded porous SiC ceramic filter supports were prepared using SiC powder (d(50) = 212 mu m), Al2O3, and clay as bond forming additives and graphite as pore former following reaction bonding of powder compacts at 1400 degrees C in air. Reaction bonding characteristics, phase composition, porosity, pore size, mechanical strength, and microstructure of porous SiC ceramic supports were investigated. Mullite bond phase formation kinetics was studied following the Johnson-Mehl-Avrami-Kolmogorov (JMAK) model using non-isothermal differential thermal analysis (DTA) data. Compared to porous SiC ceramic filter supports having no needle-like mullite bond phase, materials processed by the mullite bonding technique exhibited higher average strength (22.1%) and elastic modulus (5.4%) at a similar porosity level of similar to 38%, with upper and lower bounds of their strength, modulus, and porosity being 39.1 MPa, 40.2 GPa, and 36.3% and 34.2 MPa, 31.3 GPa, and 33.0%, respectively. Spray coating method was applied for preparation of oxidation-bonded SiC filtration layer having thickness of similar to 150 mu m and pore size of similar to 5-20 mu m over the porous SiC support compacts using aqueous slurry made of fine SiC powder (d(50) = 15 mu m) followed by sintering. The layered ceramics thus prepared are potential materials for gas filter applications.
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| Publisher |
Wiley
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| Date |
2021-05
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cgcri.csircentral.net/5209/1/atanu.pdf
Dey, Atanu and Kayal, Nijhuma and Chakrabarti, Omprakash and Fortes, Nilo M and Innocentini, Murilo D M and Molla, Atiar Rahaman and Sinha, Prasanta and Dalui, Srikanta (2021) Studies on processing of layered oxide-bonded porous sic ceramic filter materials. International Journal of Applied Ceramic Technology, 18 (3). pp. 869-879. ISSN 1546-542X |
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| Relation |
http://cgcri.csircentral.net/5209/
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