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

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

Effect of Transition Metal on Properties of SiC Electroconductive Ceramic Composites

SIC 도전성 세라믹 복합체의 특성에 미치는 천이금속의 영향

  • 신용덕 (원광대 공대 전기전자 및 정보공학부) ;
  • 오상수 (원광대 대학원 전기공학) ;
  • 주진영 (한보 NISCO 기술연구소)
  • Published : 2004.07.01
Download PDF
⟨ Previous Next ⟩

Abstract

The composites were fabricated, respectively, using 61vol.% SiC - 39vol.% TiB$_2$ and using 61vo1.% SiC - 39vo1.% WC powders with the liquid forming additives of 12wt% $Al_2$O$_3$＋Y$_2$O$_3$ by pressureless annealing at 180$0^{\circ}C$ for 4 hours. Reactions between SiC and transition metal TiB$_2$, WC were not observed in this microstructure. The result of phase analysis of composites by XRD revealed SiC(6H), TiB$_2$ and YAG(Al$_{5}$Y$_3$O$_{12}$) crystal phase on the SiC-TiB$_2$, and SiC(2H), WC and YAG(Al$_{5}$Y$_3$O$_{12}$) crystal phase on the SiC-WC composites. $\beta$\$\longrightarrow$$\alpha$-SiC phase transformation was ocurred on the SiC-TiB$_2$, but $\alpha$\$\longrightarrow$$\beta$-SiC reverse transformation was not occurred on the SiC-WC composites. The relative density, the vicker's hardness, the flexural strength and the fracture toughness showed respectively value of 96.2%, 13.34GPa, 310.19Mpa and 5.53Mpaㆍml/2 in SiC-WC composites. The electrical resistivity of the SiC-TiB$_2$ and the SiC-WC composites is all positive temperature coefficient resistance(PTCR) in the temperature ranges from $25^{\circ}C$ to 50$0^{\circ}C$. 2.64${\times}$10-2/$^{\circ}C$ of PTCR of SiC-WC was higher than 1.645${\times}$10-3/$^{\circ}C$ of SiC-TiB$_2$ composites.posites.

Keywords

References

  1. Patrica A. Hoffman, 'Thermo Elastic Properties of Silicon Carbide-Titanium Diboride Particulate Composites,' M.S Thesis, 1992
  2. Hideto Hashiguchi and Hisashi Kimugasa, 'Electrical Resistivity of ${\alpha}$-SiC Ceramics Added with NiO' J. Ceram. Soc. Japan, 102(2), pp.160-164, 1994 https://doi.org/10.2109/jcersj.102.160
  3. N. P. Padture, 'In Situ-Toughened Silicon Carbide' J. Am. Ceram. Soc., 77[2], pp.519-523, 1994 https://doi.org/10.1111/j.1151-2916.1994.tb07024.x
  4. Yong Deok Shin, Jin Youn Ju, Kwang soo Choi, Sang soo Oh, Je Ho Seo, ' Effect of Annealing Temperature on the Properties of ${\beta}$-SiC-TiB2 Electrocondutive Ceramic Composites by Spray Dry', Trans. KIEE, Vol.52C, Np.8, pp.335-341, 2003
  5. Do Hyeong Kim AND Chong Hee Kim, 'Toughening Behavior of Silicon Carbide with Additions of Yttria and Alumina', J. Am. Ceram. Soc., vol.735, pp.1431-34, 1990
  6. 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
  7. Yon Kap Park, Jun Tae Kim and Yong Hyuck Baik, 'Mechanical Properties and Electrical Discharge Machinability of $\beta$-Sialon-TiB2 Composites' J. Mater. Sci. Korean, 5[1], pp.19-24, 1999
  8. Jie Zhang, Joong Chai Jung, Jong Hyeon Lee and Chang Whan Won, 'Synthesis of WC Powder by Process' J. Kor. INST. Met & Mater, Vol.38, No.5, 2000
  9. L. J. Van der Paw, 'A Method of Measuring Specific Resistivity and Hall Effect of Discs of Arbitrary Shapes' Philips Res. Repts, Vol.13, NO.1, pp.1-9, 1958
  10. A. G. Evans and T. R. Wilshaw 'Quasi-Static Solid Particle Demage in Brittle Solids-1. Observation Analysis and Implication' Axta Matallurgica, Vol.24, pp.939-956, 1976 https://doi.org/10.1016/0001-6160(76)90042-0
  11. Yong Deok Shin, 'Electric Discharge Machining of Hot-Pressed SiC-ZrB2 Composites Cramic' Trans. KIEE, Vol.46, NO.7, pp.1062-1067, 1997
  12. A. R. Kieffer, P. Ettmayer, E. Angel and A. Schmidt, 'Phase Stability of SiC in the Ternary System Si-C-N' Mater. Res. Bull., Vol.4, pp.S153-S166, 1969 https://doi.org/10.1016/0025-5408(69)90050-6
  13. N. W. Jepps and T. F. Page, 'The 6H${\to}$3C Reverse Transformation in Silicon Carbide Compacts' J. Am. Ceram. Soc., Vol.64, No.12, pp.c-177-c-178, 1981 https://doi.org/10.1111/j.1151-2916.1981.tb15906.x
  14. Servet Turan and Kevin M.Knowles, '${\alpha}{\to}{\beta}$ Reverse Phase Transformation in Silicon Carbide in Silicon Nitride-Particulate-Reinforced-Silicon Carvide Composites' J. Am. Ceram. Soc., Vol.79, No.11, pp.2892-2896, 1996 https://doi.org/10.1111/j.1151-2916.1996.tb08723.x
  15. Jin Young Ju and Yong Deok Shin, 'Phase Transformation and Mechanical Properties on Sintering Temperature of ${\beta}$-SiC Manufactured by Presureless Sintering' receedings of the KIEE Annual Summer Conforence, Vol.2, No.1, pp.1433-1435, 2001
  16. Jin Young Ju, Young Deok Shin, Mi Lim Park, Jong Deok Lee, 'Phase Trasformation and Mechanical Properties on Sintering Temperature of ${\alpha}$-SiC Manufactured by Presureless Sintering' Proceeding of the KIEEME Annual Summer Conference, pp.431-434, 2001
  17. 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
  18. Ken Takahashi, Ryutarou Jimbou, Yasuo Matsushita, Seiichi Yamada and Testsuo Kosugi 'Proerties of SiC Based Electro-Conductive Ceramic Composites' Yogyo-Kyokai-Shi, 93[3], pp123-129, 1985 https://doi.org/10.2109/jcersj1950.93.1075_123