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J. Korean Ceram. Soc. > Volume 45(8); 2008 > Article
Journal of the Korean Ceramic Society 2008;45(8): 439.
doi: https://doi.org/10.4191/kcers.2008.45.8.439
Optimizing Electrical and Mechanical Properties of Reaction-Sintered SiC by using Different-Sized SiC Particles in Preform
Young-Sam Jeon, Hyun-Ho Shin1, Jin-Soo Park1, Sang-Won Kang2
Device and Materials Laboratory, LG Electronics Institute of Technology
1Department of Ceramic Engineering, Kangnung National University
2Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology
A series of reaction-sintered SiC was fabricated from preforms with varying volume fractions of two resin-coated SiC particles of different sizes (63 and $18{mu}m$). The electrical resistivity and mechanical strength were eventually optimized at the small particle volume fraction of $0.3{sim}0.4$, at which point the porosity of the preform was minimized. This study experimentally proves that additional processes after the formation of the preform, such as silicon infiltration and reaction sintering, do not apparently alter the optimum volume fraction of the preform packing, predicted by an existing analytical model based on solid packing. Thus, the volume fraction of particles of different sizes can be determined practically through the solid packing model to fabricate RSSCs with optimal properties.
Key words: Reaction-sintered SiC, Residual silicon, Preform, Particle mixing ratio
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