Processing and Mechanical Properties of Microcellular Ceramics
Recently, a novel processing route for fabricating microcellular ceramics has been developed. The strategy for making the microcellular ceramics involves: (i) forming some shapes containing a mixture of preceramic polymer, expandable microspheres and optional fillers by a conventional ceramic forming method, (ii) foaming the compact by heating, (iii) cross-linking the foamed body, and (iv) transforming the foamed body into microcellular ceramics by pyrolysis. The flexural strength and compressive strengths of the microcellular ceramics were investigated; values up to 30 MPa and 100 MPa, respectively, were obtained at room temperature. The superior mechanical properties were attributed to homogeneous distribution of cells in microcellular ceramics.
T. Ohji, T. Sekino and K. Niihara
Y. W. Kim et al., "Processing and Mechanical Properties of Microcellular Ceramics", Key Engineering Materials, Vols. 317-318, pp. 899-904, 2006