Journal
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
Volume 11, Issue 5, Pages 804-816Publisher
WILEY
DOI: 10.1111/ijac.12090
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Funding
- CGCRI Supra Institutional Project [SIP 0023]
- CSIR
- CNPq, Brazil
- CGCRI (CSIR) [SIP0023]
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A theoretical relation between processing parameters and porosity (29-56%) of mullite-bonded porous SiC ceramics was derived and validated with experimental data. Porosity-dependent variation of fracture strength (9-34 MPa) and elastic modulus (7-28 GPa) was explained by the minimum solid area model. At room temperature, the Darcian, k(1) (1.2 x 10(-13)-1.6 x 10(-12) m(2)) and the non-Darcian, k(2) (4.6 x 10(-9)-2.7 x 10(-7) m) permeability coefficients showed linear variation with porosity. Tests conducted up to 650 degrees C indicated an increase in k(1) with temperature and a reverse trend for k(2). Airborne NaCl nanoparticle filtration tests showed good performance of SiC ceramics with fractional collection efficiency of >99% at 46-56% porosity levels.
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