한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제10권1호
  • /
  • Pages.44-53
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  • 2006
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  • 1226-6027(pISSN)
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  • 2288-4548(eISSN)
한국추진공학회 (The Korean Society of Propulsion Engineers)
권호 표지

전산화 단층촬영에 의한 니들펀칭 탄소/탄소 복합재료 노즐 목삽입재의 밀도 분포 평가

Density Profile Evaluation of Needle-punched Carbon/Carbon Composites Nozzle Throat by the Computed Tomography

  • 김동륜 (국방과학연구소 기술연구본부) ;
  • 윤남균 (국방과학연구소 기술연구본부) ;
  • 이진용 (국방과학연구소 기술연구본부)
  • 발행 : 2006.03.01
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초록

전산화 단층촬영법을 이용하여 탄소/탄소 목삽입재의 밀도 분포를 평가하였다. 전산화 단층촬영법의 Team hardening, 전기적 잡음 및 산란 X-ray의 영상을 보정하고 신호 대 잡음비를 높여 최적화할 때 측정된 탄소/탄소 복합재료의 밀도는 98.74%의 신뢰도 수준에서 ${\pm}0.01g/cm^3$ 분포를 갖는 것으로 평가되었다. 전산화 단층촬영 결과의 검증은 탄소/탄소 목삽입재를 절단하여 수침법에 의한 밀도 측정과 주사전자현미경 관찰을 통하여 수행되었으며 단층촬영 결과는 수침법에 의한 밀도 분포와 주사전자현미경의 영상과 일치하였다.

In this study, the non-destructive computed tomography was adopted to observe the density profile of the needle-punched Carbon/Carbon(C/C) composites nozzle throat. The density profile of C/C was evaluated within ${\pm}0.01g/cm^3$ with 98.74% confidence when the correction of the image and high signal-to-noise ratio were achieved by the optimization of the beam hardening, the electrical noise and the scattered X-ray. The density variation of C/C with the computed tomography was in good agreement with the results obtained by the water immersion method and the observation with scanning electron microscope.

키워드

참고문헌

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