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Si 3 N 4 whiskers were synthesized by the carbothermal reduction process in porous SiC bodies. The SiC bodies had a sponge microstructure with pore sizes of approximately 600 μm. The raw materials for the Si 3 N 4 whiskers were powder mixtures of Si 3 N 4 , SiO 2 and Si for silicon and phenolic resin for carbon. Cobalt was used as a metal catalyst...
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