한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제55권4호
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  • Pages.392-399
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  • 2018
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  • 1229-7801(pISSN)
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  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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Mechanical Properties of Cf/SiC Composite Using a Combined Process of Chemical Vapor Infiltration and Precursor Infiltration Pyrolysis

  • Kim, Kyung-Mi (Icheon Branch, Korea Institute of Ceramic Engineering and Technology) ;
  • Hahn, Yoonsoo (Icheon Branch, Korea Institute of Ceramic Engineering and Technology) ;
  • Lee, Sung-Min (Icheon Branch, Korea Institute of Ceramic Engineering and Technology) ;
  • Choi, Kyoon (Icheon Branch, Korea Institute of Ceramic Engineering and Technology) ;
  • Lee, Jong-Heun (Department of Materials Science and Engineering, Korea University)
  • 투고 : 2018.05.09
  • 심사 : 2018.06.26
  • 발행 : 2018.07.31
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초록

$C_f/SiC$ composites were prepared via a process combining chemical vapor infiltration (CVI) and precursor infiltration pyrolysis (PIP), wherein silicon carbide matrices were infiltrated into 2.5D carbon preforms. The obtained composites exhibited porosities of 20 vol % and achieved strengths of 244 MPa in air at room temperature and 423 MPa at $1300^{\circ}C$ under an Ar atmosphere. Carbon fiber pull-out was rarely observed in the fractured surfaces, although intermediate layers of pyrolytic carbon of 150 nm thickness were deposited between the fiber and matrix. Fatigue fracture was observed after 1380 cycles under 45 MPa stress at $1000^{\circ}C$. The fractured samples were analyzed by transmission electron microscopy to observe the distributed phases.

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