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http://dx.doi.org/10.4191/kcers.2013.50.6.429

Fabrication and Mechanical Properties of Porous Silicon Carbide Ceramics from Silicon and Carbon Mixture  

Kim, Jong-Chan (School of Advanced Materials Science & Engineering, Sungkyunkwan University)
Lee, Eun Ju (School of Advanced Materials Science & Engineering, Sungkyunkwan University)
Kim, Deug-Joong (School of Advanced Materials Science & Engineering, Sungkyunkwan University)
Publication Information
Journal of the Korean Ceramic Society / v.50, no.6, 2013 , pp. 429-433 More about this Journal
Abstract
Silicon, carbon, and B4C powders were used as raw materials for the fabrication of porous SiC. ${\beta}$-SiC was synthesized at $1500^{\circ}C$ in an Ar atmosphere from a silicon and carbon mixture. The synthesized powders were pressed into disk shapes and then heated at $2100^{\circ}C$. ${\beta}$-SiC particles transformed to ${\alpha}$-SiC at over $1900^{\circ}C$, and rapid grain growth of ${\alpha}$-SiC subsequently occurred and a porous structure with elongated plate-type grains was formed. The mechanism of this rapid grain growth is thought to be an evaporation-condensation reaction. The mechanical properties of the fabricated porous SiC were investigated and discussed.
Keywords
Silicon carbide; Porous ceramic; Phase transformation; Grain growth;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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