Abstract
A simple processing route for manufacturing highly porous, silica-bonded SiC ceramics with spherical pores has been developed. The strategy adopted for making porous silica-bonded SiC ceramics entails the following steps: (i) fabricating a formed body through a combination of SiC and polymer microbeads (employed as sacrificial templates) and (ii) sintering the formed body in air. SiC particles are bonded to each other by oxidation-derived SiO2 glass. By controlling the microbead content and the sintering temperature, it was possible to adjust the porosity such that it ranged from 19 to 77%. The flexural and compressive strengths of the porous silica-bonded SiC ceramics with ≈40% porosity were ≈65 MPa and ≈200 MPa, respectively. The superior strengths were attributed to the homogeneous distribution of small (≤30 μm), spherical pores with dense struts in the porous silica-bonded SiC ceramics.
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References
S. Ito, T. Tanaka, and S. Kawamura,Powder Tech. 100, 32 (1998).
J. H. She, Z. Y. Deng, J. Daniel-Doni, and T. Ohji,J. Mater. Sci. 37, 3615 (2002).
Y.-W. Kim, S. H. Lee, T. Nishimura, M. Mitomo, J. H. Lee, and D.-Y. Kim,Key Eng. Mater. 287, 299 (2005).
M. Benaissa, J. Werckmann, G. Ehret, E. Peschiera, J. Guille, and M. J. Ledoux,J. Mater. Sci. 29, 4700 (1994).
P. H. Pastila, V. Helanti, A. P. Nikkila, and T. A. Mantyla,Ceram. Eng. Sci. Proc. 19, 3744 (1998).
M. Keller, C. Pham-Huu, S. Roy, M. J. Ledoux, C. Estournes, and J. Guille,J. Mater. Sci. 34, 3189 (1999).
I. K. Sung, S. B. Yoon, J. S. Yu, and D. P. Kim,Chem. Comm. 38, 1480 (2002).
T. J. Fitzgerald and A. Mortensen,J. Mater. Sci. 30, 1025 (1995).
T. J. Fitzgerald, V. J. Michaud, and A. Mortensen,J. Mater. Sci. 30, 1037 (1995).
S. H. Kim, Y.-W. Kim, J.-Y. Yun, and H. D. Kim,J. Kor. Ceram. Soc. 41, 541 (2004).
Y.-W. Kim, S. H. Kim, I. H. Song, H. D. Kim, and C. B. Park,J. Am. Ceram. Soc. 88, 2949 (2005).
J. H. She, J. F. Yang, N. Kondo, T. Ohji, and S. Kanzaki,J. Am. Ceram. Soc. 85, 2852 (2002).
J. H. She, T. Ohji, and S. Kanzaki,J. Europ. Ceram. Soc. 24, 331 (2003).
Y.-W. Kim and C. B. Park,Comp. Sci. Tech. 63, 2371 (2003).
Y.-W. Kim, S. H. Kim, C. Wang, and C. B. Park,J. Am. Ceram. Soc. 86, 2231 (2003).
Y.-W. Kim, S. H. Kim, H. D. Kim, and C. B. Park,J. Mater. Sci. 39, 5647 (2004).
V. Yaroshenko and D. S. Wilkinson,J. Am. Ceram. Soc. 84, 850 (2001).
R. W. Rice,J. Mater. Sci. 28, 2187 (1993).
F. P. Knudsen,J. Am. Ceram. Soc. 42, 376 (1959).
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Chun, YS., Kim, YW. Processing and mechanical properties of porous silica-bonded silicon carbide ceramics. Met. Mater. Int. 11, 351–355 (2005). https://doi.org/10.1007/BF03027504
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DOI: https://doi.org/10.1007/BF03027504