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

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

Properties of SiC-Ti $B_2$ Electroconductive Ceramic Composites by Pressureless Annealing

무가압 Annealing한 $SiC-TiB_2$전도성 세라믹 복합체의 특성

  • 신용덕 (원광대 전기전자 및 정보공학부) ;
  • 주진영 (원광대 전기공학과) ;
  • 최광수 (원광대 전기공학과) ;
  • 오상수 (원광대 전기공학과) ;
  • 윤양웅 (원광대 전기전자 및 정보공학부)
  • Published : 2003.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

The mechanical and electrical properties of the hot-pressed and pressureless annealed SiC-Ti $B_2$electroconductive ceramic composites were investigated as functions of the liquid additives of $Al_2$ $O_3$+ $Y_2$ $O_3$. The result of phase analysis for the SiC-Ti $B_2$ composites by XRD revealed $\alpha$-SiC(6H), Ti $B_2$, and YAG(A $l_{5}$ $Y_3$ $O_{12}$ ) crystal phase. The relative density of SiC-Ti $B_2$ composites was increased with increased $Al_2$ $O_3$+ $Y_2$ $O_3$ contents. The fracture toughness showed the highest value of 6.04 Mpa $m^{\frac{1}{2}}$ for composites added with l2wt% A1$_2$ $O_3$+ $Y_2$ $O_3$ additives at room temperature. The electrical resistivity showed the lowest value of 6.2$\times$10$^{-3}$ $\Omega$ㆍcm for composite added with l6wt% $Al_2$ $O_3$+ $Y_2$ $O_3$ additives at room temperature. The electrical resistivity of the SiC-Ti $B_2$ composites was all positive temperature cofficient resistance(PTCR) in the temperature ranges from $25^{\circ}C$ to $700^{\circ}C$.

Keywords

References

  1. S. Prochazka and R. M. Scanlan, 'Effeect of Boron and Carbon on Sintering SiC' J. Am. Ceram. Soc., Vol. 58, NO. 1-2, pp. 72, 1975 https://doi.org/10.1111/j.1151-2916.1975.tb18990.x
  2. F. F. Lange and T. K. gupta, 'Sintering of SiC with Boron Compounds' J. Am. Ceram. Soc.,-Discussions and Notes, Vol. 59, NO. 11-12, 537-538, 1976
  3. Yukio Takeda, Kousuke Nakamura, Kunihiro Maeda and Yasuo Matsushita, 'Effects of Elemental Additives on Electrical Resistivity of Silicon Carbide Ceramics' J. Am. Ceram. Soc., 70[10], c-266-c-267, 1987 https://doi.org/10.1111/j.1151-2916.1987.tb04895.x
  4. Do-Hyeong Kim and Chong HeeKim,'Toughening Behavior of Silicon Carbide with Additions of Yttria and Alumina' J. Am. Ceram. Soc., Vol. 735, pp.1431-34, 1990 https://doi.org/10.1111/j.1151-2916.1990.tb05219.x
  5. Suresh Baskaran and John W. Halloran, 'Fibrous Monolithic Ceramics: II, Flexural Strength and Fracture Behavior of the Silicon Carbide/Graphite System' J. Am. Ceram. Soc., Vol. 76 NO. 9, pp. 2217-2224, 1993 https://doi.org/10.1111/j.1151-2916.1993.tb07757.x
  6. Seung-Hyunk 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
  7. Yong-Deok shin, Dong-Yoon Lee, 'Estimation of the Preperties for the $SiC-TiB_2$ Electrocondutive Ceramic Composites by YAG and Porosity' Trans. KIEE. Vol. 50 NO. 11, pp. 544-549, 2001
  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. M. Ramulu and M. Taya 'EDM machinability of SiCw/Al Composites' Journal of Materials Science, Vol. 24, pp. 1103-1108, 1989 https://doi.org/10.1007/BF01148805
  10. M. A. Mulla, V.D Krstic 'Pressureless sintering of-SiC with $Al_2O_3+Y_2O_3$ additions' J. Mat. Sci. Vol. 29, pp. 934-938, 1994 https://doi.org/10.1007/BF00351412
  11. William D. Callister, 'Materials Science and Engineering and Introduction' Fourth Edition, pp. 513, John Willy & Sons, Inc.1996
  12. Patricia A. Hoffman, 'Thermo Elastic Properties of Silicon Cabide-Titanium Diboride Particulate Composite' M. S Thesis, Department of Materials Science and Engineering, The Pennsylvania State University, 1992
  13. Jurgen Rodel, 'Interaction Between Crack Deflection and Crack Bridging' Journal of the European Ceramic Society, 10, pp. 143-150, 1992 https://doi.org/10.1016/0955-2219(92)90027-B