Effect of submicron silicon carbide powder addition on the processing and strength of reaction-sintered mullite-silicon carbide composites
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- EOM Jung-Hye
- Department of Materials Science and Engineering, the University of Seoul
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- KIM Young-Wook
- Department of Materials Science and Engineering, the University of Seoul
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- WOO Sang-Kuk
- Energy Materials Research Center, Korea Institute of Energy Research
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- HAN In-Sub
- Energy Materials Research Center, Korea Institute of Energy Research
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Abstract
Mullite-silicon carbide composites were fabricated via a reaction sintering using SiC and alumina (Al2O3) powders. The mullite phase was in situ synthesized from the reaction between the oxidation-derived SiO2 and alumina. The effects of incorporating submicron (∼0.5 μm) SiC powder (in addition to the coarser (∼65 μm) SiC powder) on the microstructures, densities, and flexural strengths of the composites were investigated. The addition of submicron SiC powder was found to increase the mullite content, relative density, and flexural strength of the composite. The 6-h-sintered composite containing 40 mass% submicron SiC powder had the highest flexural strength. A slightly lower strength was observed for the composite containing 50 mass% submicron SiC powder. This was attributed to there being insufficient alumina in the starting powder for synthesizing the mullite. The composites sintered for 6 h typically had flexural strengths of ∼90 MPa at 25% porosity.
Journal
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 117 (1364), 421-425, 2009
The Ceramic Society of Japan
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Details 詳細情報について
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- CRID
- 1390282680259840896
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- NII Article ID
- 10025966888
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- NII Book ID
- AA12229489
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- ISSN
- 13486535
- 18820743
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- NDL BIB ID
- 10198254
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed