Paper Title:
Fabrication, Structure and Properties of Porous SiC Ceramics with High Porosity and High Strength
  Abstract

Porous SiC ceramics with high porosity and high strength were fabricated by gelcasting, with tert-butyl alcohol (TBA) as solvent, acrylamide (AM) as monomer, and in-situ reaction bonding with a-Al2O3 as sintering additive. SiC suspension with 10 vol% solid loading was successfully solidified by gel-casting to form high strength green body. The results showed that the compressive strength of the porous SiC ceramics increased with sintering temperature from 1300 to 1450°C, but porosity had little change, due to formation of more volume of cristobalite and mullite phases on the surface of SiC grains, accompanied by a large volume expansion effect. Very narrow single-peak distributions with about 2 mm median pore diameter could be found for the porous SiC ceramics. The porosity and compressive strength of the porous SiC ceramics sintered at 1450°C were 71.21 % and 12.14 MPa, respectively.

  Info
Periodical
Advanced Materials Research (Volumes 105-106)
Edited by
Wei Pan and Jianghong Gong
Pages
608-611
DOI
10.4028/www.scientific.net/AMR.105-106.608
Citation
S. F. Wang, C. A. Wang, J. L. Sun, L. Z. Zhou, Y. Huang, "Fabrication, Structure and Properties of Porous SiC Ceramics with High Porosity and High Strength", Advanced Materials Research, Vols. 105-106, pp. 608-611, 2010
Online since
April 2010
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$32.00
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