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Effect of Uniformity on the Electrical Resistivity of SiC‐ZrB 2 Ceramic Composites
Author(s) -
Takahashi Ken,
Jimbou Ryutaro
Publication year - 1987
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1987.tb04922.x
Subject(s) - electrical resistivity and conductivity , materials science , composite material , ceramic , dispersion (optics) , composite number , optics , physics , electrical engineering , engineering
Effect of uniformity on the resistivity was investigated for SiC‐ZrB 2 ceramic composites. Dispersion of ZrB 2 particles was numerically characterized by image analysis. Spatial fluctuation of composition greatly affected the resistivity of composites. The effective medium theory was extended to treat composites with composition spatial fluctuation. The extended theory successfully explained the effect of uniformity on the resistivity of composites in relatively uniform cases. In composites of low uniformity, enhancing the uniformity increased the resistivity by breaking chains of ZrB 2 particles.