α-SiC-WC 電導性 세라믹 複合體의 特性에 미치는 無加壓 Annealing 溫度

Effect of Pressurless Annealing Temperature on the Properties of α-SiC-WC Electroconductive Ceramic Composites.

  • 발행 : 2004.05.01

초록

The composites were fabricated 61 vol.%α-α-SiC and 39vol.% WC powders with the liquid forming additives of 12wt% Al₂O₃+Y₂O₃ by pressureless annealing at 1700, 1800, 1900℃ for 4 hours. The result of phase analysis of composites by XRD revealed α-SiC(2H), WC, and YAG($Al_5Y_3O_{12}$) crystal phase. The relative density, the flexural strength, fracture toughness and Young′s modulus showed respectively the highest value of 99.4%, 375.76㎫, 5.79㎫ㆍ$m^{\frac{1}{2}}$, and 106.43㎬ for composite by pressureless annealing temperature 1900℃ at room temperature. The electrical resistivity showed the lowest value of 1.47×$10^{-3}$/Ω·㎝ for composite by pressureless annealing temperature 1900℃ at 25℃. The electrical resistivity of the α-SiC-WC composites was all positive temperature cofficient resistance (PTCR) in the temperature ranges from 25℃ to 500℃.

키워드

참고문헌

  1. M.S Thesis Thermo 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 https://doi.org/10.2109/jcersj.102.160
  3. Trans. KIEE v.52C no.8 Effect of Annealing Temperature on the Propertiesof β-SiC-TiB₂ Electrocondutive Ceramic Composites by Spray Dry Yong-Deok Shin;Jin-Young Ju;Kwang-soo Choi;Sang-soo Oh;Je-Ho Seo
  4. J. Am. Ceram. Soc. v.735 Toughening Behavior of Silicon Carbide with Additions of Yttria and Alumina Do-Hyeong Kim;Chong Hee Kim
  5. Trans. KIEE v.49 no.9 The Properties of β-SiC-TiB₂ Electroconductive Ceramic Composites Densified by Liquid-Phase Sintering Seung Hyuk Yim;Yong Deok Shin;Joon Tae Song
  6. J. Kor. Inst. Met. & Mater. v.38 no.5 Synthesis of WC Powder by Process Jie Zhang;Joong-Chai Jung;Jong-Hyeon Lee;Chang-Whan Won
  7. Journal of Materials Science v.24 EDM machinability of SiCw/Al Composites M.Ramulu;M.Taya https://doi.org/10.1007/BF01148805
  8. Axta Matallurgica v.24 Quasi-StaticSolid Particle Demage in Brittle Solids-1 Observation Analysis and Implication A.G.Evans;T.R.Wilshaw https://doi.org/10.1016/0001-6160(76)90042-0
  9. Trans. KIEE v.46 no.7 Electric Discharge Machining of Hot-Pressed SiC-ZrB₂ Composites Ceramic Yong Deok Shin
  10. Materials Science And Engineering An Introducdtion (Fifth Edition) Wiliam D.Callister Jr.
  11. Journal of the European Ceramic Society v.10 Interaction Between Crack Deflection and Crack Bridging Jurgen Rodel https://doi.org/10.1016/0955-2219(92)90027-B
  12. Trans. KIEE v.48C no.2 Properties and Manufacture of the β-SiC-ZrB₂ Composites Densified by Liquid-Phase Sintering Yong-Deok Shin;Jin-Young