Porous Si-SiC Ceramics Derived by Oxidation from C/C-Si-SiC Composites
V.K. Srivastava1, W. Krenkel2, V.J.A. D'Souza3, H.W. Mucha4
1 Banaras Hindu University, Institute of Technology, Department of Mechanical Engineering, Varanasi, India
received November 7, 2010, received in revised form March 4, 2011, accepted March 11, 2011
Vol.2, No.2, Pages 111-118 DOI: 10.4416/JCST2011-00007
Novel porous Si-SiC ceramics are derived by the oxidation of C/C-Si-SiC fibre matrix composites. The correlated mass loss and obtained open porosity depend on the temperature and holding times of the oxidation process. Microstructure and phase analyses of the Si-SiC composites are performed and supplemented with experimental determinations of the open porosity, the pore size distribution and surface area. These macroscopic properties are influenced by the parameters of the oxidation process. Material parameters like the fibre alignment (weave style resp. fibre length) and phenolic resin type (resol and novolac) are considered as well. The experimental findings serve as a basis for modelling the open porosity. The open porosity and its pore size distribution are determined theoretically on this model basis and validated with the experimental results.
C/C-SiC composite, Si-SiC porous ceramic, oxidation, open porosity
1 Krenkel, W.: From Polymer to Ceramics: Low Cost Manufacturing of Ceramic Matrix Composite Materials, Mol. Cryst. and Liq. Cryst., 354, , 353 – 364, (2000).
2 Zawada, L.P., Hay, R.S., Lee, S.S., Staehler, J.: Characterization and High-Temperature Mechanical Behavior of an Oxide/Oxide Composite, J. Am. Ceram. Soc., 86, , 981 – 990, (2003).
3 Levi, C.G., Yang, J.Y., Dalgleish, B.J., Zok, F.W., Evans, A.G.: Processing and Performance of an All-Oxide Ceramic Composite, J. Am. Ceram. Soc., 81, , 2077 – 2086, (1998).
4 Levi, C.G., Zok, F.W., Yang, J.Y., Mattoni, M., Löfvander, J.P.A.: Microstructural Design of Stable Porous Matrices for All-Oxide Ceramic Composites, Z. Metall., 90, , 1037 – 1047, (1999).
5 Weiss, R.: Carbon-Fibre-Reinforced CMCs: Manufacture, Properties, Oxidation Protection, in: High Temperature Ceramic Matrix Composites, WILEY-VCH, Weinheim, Germany, 440 – 456, (2001).
6 Christin, F.: Design, Fabrication and Application of Thermostructural Composites (TSC) like C/C, C/SiC and SiC/SiC Composites, Adv. Eng. Mater., 4, , 903 – 912, (2002).
7 Kochendörfer, R., Lützenburger, N.: Applications of CMCs made via the Liquid Silicon Infiltration (LSI) Technique, in: High Temperature Ceramic Matrix Composites, WILEY-VCH, Weinheim, Germany, 277 – 287, (2001).
8 Labanti, M., Martignani, G., Mingazzini, C., Minoccari, G.L., Pilotti, L., Ricci, A., Weiss, R.: Evaluation of Damage by Oxidation Corrosion at High Temperatures of Coated C/C-SiC Ceramic Composite, in: High Temperature Ceramic Matrix Composites, WILEY-VCH, Weinheim, Germany, 218 – 223, (2001).
9 Hillig, W.B., Mehan, R.L., Morelock, C.R., DeCarlo, V.I., Laskow, W.: Silicon/Silicon Carbide Composites, Am. Ceram. Soc. Bull., 54,  (1975).
10 Krenkel, W.: Cost Effective Processing of CMC Composites by Melt Infiltration (LSI-Process), Ceram. Eng. Sci. Proc., 22, , 443 – 454, (2001).
11 Schulte-Fischedick, J., Zern, A., Mayer, J., Rühle, M., Friess, M., Krenkel. W., Kochendörfer, R.: The Morphology of Silicon Carbide in C/C-SiC Composites, J. Mater. Sci. Eng. A, 146 – 152, (2002).
12 Krenkel, W., Renz, R., Heidenreich, B.: Lightweight and Wear Resistant CMC Brakes, In: Ceramic Materials and Components for Engines, WILEY-VCH, Weinheim, Germany, 63 – 67, (2001).
13 Krenkel, W.: Designing with C/C-SiC Composites, in: Advances in Ceramic Matrix Composites IX, Ceram. Trans., 153, 103 – 123, (2003).
14 Soong, T. T.: Fundamentals of Probability and Statistics for Engineers, John Wiley & Sons, Ltd., (2004).
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