Alumina/silicon carbide composites fabricated via in situ synthesis of nano-sized SiC particles |
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Authors: | S. Gustafsson,L.K.L. Falk,E. Lidé n,E. Carlströ m |
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Affiliation: | 1. Department of Applied Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden;2. Swedish Ceramic Institute, Swerea IVF, Box 104, SE-431 22 Mölndal, Sweden |
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Abstract: | Alumina/silicon carbide composites have been fabricated by a new technique involving the in situ synthesis of nano-sized SiC particles. A mixture of alumina powder and silicon carbide precursors was prepared in an aqueous suspension. Green bodies were formed by cold isostatic pressing of granules obtained by freeze granulation, and pressureless sintered at 1750 °C for 4 h in an argon atmosphere. Mullite (10–20 vol%) formed in addition to SiC during sintering. The SiC particles were located predominantly to the interior of the mullite and alumina matrix grains. |
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Keywords: | B. Nanocomposites D. Al2O3 D. SiC Freeze granulation In situ synthesis |
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