The Korean Journal of Ceramics

한국세라믹학회 (The Korean Ceramic Society)
권호 표지

Properties of Electrical Discharge Machinable $SiC-TiB_2$ Composites

  • Kim, Young-Wook (Division of Ceramics, Korea Institute of Science and Technology, Seoul) ;
  • Park, Heon-Jin (Division of Ceramics, Korea Institute of Science and Technology) ;
  • Lee, June-Gunn (Division of Ceramics, Korea Institute of Science and Technology) ;
  • Lee, Soo W. (Dept. of Mater. Eng., Sun-Moon Univ) ;
  • Chung, Soon-Kil (World-Peace Institute of Technology)
  • 발행 : 1995.09.01
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초록

Electrical discharge machinable $SiC-TiB_2$ composites were fabricated by hot-pressing. Their mechanical and electrical properties were determined as a function of $TiB_2$ content. The addition of $TiB_2$ to SiC matrix increased the strength and toughness and decreased electrical resistivity. The flexural strength and fracture toughness of SiC-40 vol% $TiB_2$ composited were approximately 50% higher than those of monolithic SiC ceramics. Microstructural analysis showed that the toughening was mainly due to the crack deflection, with some possible contribution from crack branching or microcracking.

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