Effect of Uniformity on the Electrical Resistivity of SiC-ZrB2 Ceramic Composites |
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| Authors: | Ken Takahashi Ryutaro Jimbou |
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| Affiliation: | Hitachi Research Laboratory, Hitachi, Ltd., Hitachi City, 317 Japan |
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| Abstract: | Effect of uniformity on the resistivity was investigated for SiC-ZrB2 ceramic composites. Dispersion of ZrB2 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 ZrB2 particles. |
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