The Transactions of the Korean Institute of Electrical Engineers C (대한전기학회논문지:전기물성ㆍ응용부문C)

The Korean Institute of Electrical Engineers (대한전기학회)
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Electrical Conductive Mechanism of Hot-pressed $\alpha-SiC-ZrB_2$ Composites

고온가압소결한 $\alpha-SiC-ZrB_2$ 복합체의 전기전도기구

  • Shin, Yong-Deok (Dept.of Electric Electronics Information Engineering, Engineering College, Wonkwang University) ;
  • Ju, Jin-Young (Dept.of Electric Engineering Engineering College, Graduate School of Wonkwang University) ;
  • Kwon, Ju-Sung
  • 신용덕 (圓光大學 電氣電子工學部) ;
  • 주진영 (圓光大學 大學院 電氣工學科) ;
  • 권주성 (三養電子窯業(株) 附設 基礎 硏究所)
  • Published : 1999.02.01
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Abstract

The electrical conductive mechanism and temperature dependence of electrical resistivity of $\alpha-SiC-ZrB_2$ composites with $ZrB_2$ contents were investigated. The electrical resistivity of hot-pressed composites was measured by the Pauw method form $25^{\circ} to 700^{\circ}C$. The electrical resistivity of the composites follow the electrical conduction model for a homogeneous mixture of two kind of particles with different conductivity. Also, the electrical resistivity versus temperature curves indicate the formation of local chains of $ZrB_2$ particles. In case of $\alpha-SiC-ZrB_2$ composites containing above 39vol.% $ZrB_2$ showed positive temperature coefficient resistance(PTCR), whereas the electrical resistivity of $\alpha-SiC-21vol.% ZrB_2$ showed negative temperature coefficient resistance(NTCR).

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References

  1. M. S Thesis, PennState Univ. Theromo Elastic Properties of Silicon Carbide-Titanium Diboride Particulate Composites Patricia A. Hoffman
  2. J. Ceram. Soc. Japan v.102 no.2 Electrical Resistivity of α-SiC Ceramics Added with NiO Hideto Hashiguchi;Hisashi Kimugasa
  3. J. Am. Ceram. Soc. v.67 no.8 Improvements in Mechanical Properties in SiC by the Addition of TiC Particles G. C. Wei;P. F. Becher
  4. J. Mater. Sci. v.26 Surface Damage in ZrB₂-based Composite Ceramics Induced by Electro-Discharge Machining M. Nakamura;I Shigematsu;K. Kanayama;Y. Hirai
  5. Materal Science and Engineering v.A109 Studies on the Strengthening of Silicon Carbide-Based Multiphase Ceramics : The SiC-TiC Systems D. L. Jiang;J. H. Wang;Y. L. Li;L. T. Ma
  6. J. Am. Ceram. Soc. v.78 no.11 Grain Growth and Fracture Toughness of Fine-Grained Silicon Carbide Ceramics Young-Wook Kim;Hamoru Mitomo;Hideki Hirotsuru
  7. J. Am. Ceram. Soc. v.79 no.6 In Situ-Toughened Silicon Carbide-Titanium Carbide Composites Kyeong-Sik Cho;Young-Wook Kim;Heon-Jin Choi;June-Gunn Lee
  8. J. Am. Ceram. Soc. v.70 no.12 Effect of uniformity on the Electrical Resistivity of SiC-ZrB₂Ceramic Composites Ken Takahashi;Ryutaro Jimbou
  9. Pilips Research Reports v.13
  10. Yagyo-Kyoki-Shi(in Japanese) v.93 no.3 Properties of SiC Based Electro-Conductive Ceramic Composites Ken Takahashi;Ryutaro Jimbou;Yasuo Matsushita
  11. J. Ceram. Soc. Japan v.96 no.9 Electro-Discharge Machining of Ceramics(Part 2)-On Electro-Conductive ß-Silicon and Titanium Nitride Ceramics Composite Mamora Nakamura;Kouzou Kanayama;Wataru Kanematsu;Yukio Hirai
  12. Trans. KIEE v.46 no.4 Properties of Hot-Pressed SiC-ZrB₂Electroconductive Ceramic Composites Yong Deok Shin;Yong Kap Park
  13. Yogya-Kyokai-Shi(in Japanese) v.92 no.11 Electro-Discharge-Machining of Reaction Bonded Silicon Carbide(RB-SiC) Mamora Nakamura;Katsushi;Yakio Hirai