Influence of microstructure on the thermophysical properties of sintered SiC ceramics

Byungkoog Jang, Yoshio Sakka

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Abstract

The specific heat, thermal diffusivity and thermal conductivity of porous SiC ceramics sintered using two kinds of SiC powders (fine and coarse) have been investigated for sintering temperatures in the range 1700-2000 °C. Sintered SiC has a porous structure with approximately 30-40 vol.% porosity. Thermal diffusivity was measured by the laser flash method. The thermal diffusivities and thermal conductivities of sintered SiC ceramics increased with increasing sintering temperature. The specific heat decreased slightly with increasing sintering temperature. The thermal diffusivities and thermal conductivities of SiC sintered from coarse powder were higher than those of SiC sintered from fine powder. The thermal conductivity of samples increased markedly with increasing grain size.

Original languageEnglish
Pages (from-to)493-497
Number of pages5
JournalJournal of Alloys and Compounds
Volume463
Issue number1-2
DOIs
Publication statusPublished - Sep 8 2008
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Metals and Alloys

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