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

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

Manufacture and Properties of $SiC-TiB_2$Electroconductive Ceramic Composites for Pressureless Sintering

상압소결을 위한 $SiC-TiB_2$ 전도성 세라믹 복합체의 제조와 특성

  • 주진영 (원광대 전기전자공학과) ;
  • 신용덕 (원광대 전기전자공학과)
  • Published : 2001.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

The mechanical and electrical properties of the hot-pressed and pressureless annealed SiC+39vol.%$TiB_2$electroconductive ceramic composites were investigated as a function of the liquid additives of $Al_2O_3+Y_2O_3$. The result of phase analysis for the SiC+39vol.%$TiB_2$composites by XRD revealed $\alpha$-SiC(6H), $TiB_2$, and $YAG(Al_5Y_3O_{12})4 crystal phase. The relative density of SiC+39vol.%$TiB_2$ composites was increased with increased $Al_2O_3+Y_2O_3$. contents. The fracture toughness showed the highest value of $7.8 MPa.m^{1/2}$ for composites added with 12 wt % $Al_2O_3+Y_2O_3$. additives at room temperature. The electrical resistivity and the resistance temperature coefficient showed the lowest value of $7.3\times10_{-4}\Omega.cm\; and\; 3.8\times10_{-3}/^{\circ}C$ for composite added with 12 wt% $Al_2O_3+Y_2O_3$. additives at room temperature. The electrical resistivity of the SiC+39vol.%$TiB_2$composites was all positive temperature coefficient resistance(PTCR) in the temperature ranges from $25^{\circ}C\; to\; 700^{\circ}C$.

Keywords

References

  1. Mamoru Mitomo, 'Microstructural Development During Gas-Pressure Sintering of ${\alpha}$-Silicon Nitride', J. Am. Ceram. Soc., Vol. 75, No. 1, pp.103-108, 1992 https://doi.org/10.1111/j.1151-2916.1992.tb05449.x
  2. Nitin P. Padture, 'In Situ-Toughened Silicon Carbide', J. Am. Ceram. Soc., Vol. 77, No. 2, pp. 519-23, 1994 https://doi.org/10.1111/j.1151-2916.1994.tb07024.x
  3. Mamoru Mitomo, Young-Wook Kim, Hideki Hirotsuru, 'Fabrication of Silicon carbide nanoceramics', J. Mater. Res., Vol. 11, No. 7, Jul, 1996
  4. Seung Hyuk Yim, Yong Deok Shin, Jin Young Ju, Se Won Yoon and Joon Tae Song, 'Properties of ${\beta}-SiC-TiB_2$ Composites with $Al_2O_3+Y_2O_3$Additives', Trans. KIEE, Vol. 49, No. 7, pp. 394-398. 2000
  5. Seung Hyuk Yim, Yong Deok Shin and Joon Tae Song, 'The Properties of ${\beta}-SiC-TiB_2$ Electroconductive Ceramic Composites Densified by Liquid-Phase Sintering', Trans. KIEE, Vol. 49, No. 9, pp. 510-515. 2000
  6. William D. Callister, 'Materials Science and Engineering an Introduction', Fourth Edition, pp. 513, John Wiley & Sons, Inc.,1996
  7. 山根正之, 'セラミシクス基礎講座 4', pp. 151, 內田老鶴圃, 1988
  8. A. G. Evans and T. R. Wilshaw, 'Quasi-Static Solid Particle Demage in Brittle Solids-1. Observation Analysis and Implication', Acta Metallurgica, Vol. 24, pp. 939-956, 1976 https://doi.org/10.1016/0001-6160(76)90042-0
  9. L. J. Van der Paw, 'A Method of Measuring Specific Resistivity and Hall Effect of Discs of Arbitrary Shapes', Philips Research Reports, Vol. 13, No. 1, pp. 1-9, 1958
  10. Patricia A. Hoffman, 'Thermo Elastic Properties of Silicon Carbide-Titanium Diboride Particulate Composites', M.S.Thesis, Department of Materials Science and Engineering, The Pennsylvania State University, 1992