한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제23권1호
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  • Pages.79-92
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  • 2019
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  • 1226-6027(pISSN)
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  • 2288-4548(eISSN)
한국추진공학회 (The Korean Society of Propulsion Engineers)
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DSC와 XPS를 통한 수분노화가 THPP 점화제에 미치는 영향 분석

The Analysis on the Effects of Hygrothermal Aging to THPP Using DSC and XPS

  • Oh, Juyoung (Department of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Kim, Yoocheon (Department of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Yoh, Jai-ick (Department of Mechanical and Aerospace Engineering, Seoul National University)
  • 투고 : 2018.06.20
  • 심사 : 2018.10.26
  • 발행 : 2019.02.01
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초록

Titanium hydride potassium perchlorate (THPP)는 항공우주분야에서 일반적으로 널리 사용되는 불꽃점화장치중 하나이다. 현 연구에서는 THPP에 수분 열 노화를 가했을 때, 연소과정에 끼치는 영향과 변화된 결과들을 실험적으로 밝혀내었다. 우선, Differential Scanning Calorimetry (DSC)와 isoconversional method를 적용하여 노화된 THPP 시료의 반응개시지연 및 최대반응속도의 저하를 확인하였다. 반응속도 파라미터는 첫 번째 반응에서 Viton에 의해 낮아지며 후에 잔류한 $KClO_4$의 영향으로 상승하는 경향을 보였다. 그리고 X-ray photoelectron spectroscopy (XPS)를 통해 노화된 THPP 시료에서 산화제 성분은 감소하고 연료산화효과가 두드러짐을 확인하였다. 또한 NASA Chemical Equilibrium with Applications (CEA)을 사용하여 얻은 이론발열량이 DSC로부터 구한 실험적 발열량과 비슷한 경향을 따르므로 실험적으로 구한 발열량 트렌드가 타당함을 검증할 수 있었다.

Titanium hydride potassium perchlorate (THPP) is one of the commonly utilized pyrotechnic materials in aerospace industries. The current study elucidates the effects of hygrothermal aging on the combustion of THPP experimentally. First, applying the Differential Scanning Calorimetry (DSC) and isocoversional method, both the delay of reaction start and decrease in maximum reaction rate were observed. The kinetics parameters tended to fluctuate depending the thermal reaction or intermediate product formation of THPP. Also, the oxidants decomposition and fuel oxidation phenomenon were discovered by X-ray photoelectron spectroscopy (XPS). The experimental heat from DSC data were verified as reasonable by comparing with the theoretical heat obtained utilizing both THPP formulation from XPS and NASA Chemical Equilibrium with Applications (CEA). Both data had identical variation trend, which expecially had the highest heat value at 10 weeks aged sample.

키워드

과제정보

연구 과제 주관 기관 : National Space Lab, 한국연구재단

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