Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Fabrication of Porous Reaction Bonded Silicon Carbide with Multi-Layered Pore Structures

다층 기공구조를 갖는 다공성 반응소결 탄화규소 다공체 제조

  • Cho, Gyoung-Sun (Material Science & Technology Research Division, Korea Institute of Science and Technology) ;
  • Kim, Gyu-Mi (Material Science & Technology Research Division, Korea Institute of Science and Technology) ;
  • Park, Sang-Whan (Material Science & Technology Research Division, Korea Institute of Science and Technology)
  • 조경선 (한국과학기술연구원 재료기술연구본부) ;
  • 김규미 (한국과학기술연구원 재료기술연구본부) ;
  • 박상환 (한국과학기술연구원 재료기술연구본부)
  • Published : 2009.09.30
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Abstract

Reaction Bonded Silicon Carbide(RBSC) has been used for engineering ceramics due to low-temperature fabrication and near-net shape products with excellent structural properties such as thermal shock resistance, corrosion resistance and mechanical strength. Recently, attempts have been made to develop hot gas filter with gradient pore structure by RBSC to overcome weakness of commercial clay-bonded SiC filter such as low fracture toughness and low reliability. In this study a fabrication process of porous RBSC with multi-layer pore structure with gradient pore size was developed. The support layer of the RBSC with multi-layer pore structure was fabricated by conventional Si infiltration process. The intermediate and filter layers consisted of phenolic resin and fine SiC powder were prepared by dip-coating of the support RBSC in slurry of SiC and phenol resin. The temperature of $1550^{\circ}C$ to make Si left in RBSC support layer infiltrate into dip-coated layer to produce SiC by reacting with pyro-carbon from phenol resin.

Keywords

References

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Cited by

  1. Effect of SiC Filler Content on Microstructure and Flexural Strength of Highly Porous SiC Ceramics Fabricated from Carbon-Filled Polysiloxane vol.49, pp.6, 2012, https://doi.org/10.4191/kcers.2012.49.6.625