Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Fabrication and Characterization of Cf/SiC Composite with BN Interphase Coated by Wet Chemical Process

습식법으로 제조된 BN 중간층을 가진 Cf/SiC 복합재의 제조 및 물성 평가

  • Koo, Jun-mo (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Kyung Ho (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Han, Yoonsoo (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology)
  • 구준모 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 김경호 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 한윤수 (한국세라믹기술원 엔지니어링세라믹센터)
  • Received : 2017.12.08
  • Accepted : 2017.12.26
  • Published : 2017.12.31
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Abstract

In this study, we developed the h-BN interphase for ceramic matrix composites (CMCs) through a wet chemical coating method, which has excellent price competitiveness and is a simple process as a departure from the existing high cost chemical vapor deposition method. The optimum condition for nitriding an h-BN interphase using boric acid and urea as precursors were derived, and the h-BN interphase coating through a wet method on a carbon preform of 2.5 D was conducted to apply the optimum conditions to the CMCs. In order to control the coating property via the wet coating method, four parameters were investigated such as dipping time of the specimen in the precursor solution, the ratio of boric acid and urea in the precursor, the concentration of solution where the precursor was dissolved, and the cycle of dipping and dry process. The CMCs was fabricated through polymer impregnation and pyrolysis (PIP) processes and a three-point flexural strength test was conducted to verify the role of the coated h-BN interphase.

Keywords

References

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