Journal
SCRIPTA MATERIALIA
Volume 56, Issue 3, Pages 193-196Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2006.10.012
Keywords
porous material; silicon nitride; scanning electron microscopy (SEM); bending test
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Porous beta-Si3N4 ceramics were fabricated by carbothermal reaction between silica and carbon. The influences of carbon source on microstructure and the sintering behavior of the samples obtained via different sintering processes were studied. The results showed that phase composition and microstructure varied with carbon source. The resultant porous beta-Si3N4 ceramics with nanometer carbon had finer microstructure, more uniform pore structure, lower weight loss and linear shrinkage, and higher flexural strength than those using micrometer carbon. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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