한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제26권4호
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  • Pages.28-43
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  • 2022
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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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수분노화된 금속/KClO4 산화제 기반 고에너지 물질의 화학반응역학 변화를 유발하는 주요인자 확인

Key Factors that can Affect the Chemical Reaction Kinetics of Aged Metals/KClO4-based Energetic Materials

  • Oh, Juyoung (School of Aerospace Engineering, Seoul National University) ;
  • Yoh, Jai-ick (School of Aerospace Engineering, Seoul National University)
  • 투고 : 2022.06.03
  • 심사 : 2022.07.12
  • 발행 : 2022.08.31
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초록

고에너지 물질의 노화로 인하여 성능 감소를 최소화하기 위해 현재 노화 연구가 활발하게 진행되고 있지만, 개별 재료에 집중한 연구가 대부분이며 일반적인 노화 메커니즘 파악에는 미흡한 상태이다. 본 연구에서는 이러한 맹점을 해결하기 위해서 금속(W, Ti, Zr)과 KClO4 산화제를 기반으로 하는 고에너지 물질에 대하여 열/표면 분석을 수행하였으며, 이를 통해 고습도-고온 조건하에 노화된 해당 물질에서 보인 열역학적 특성 및 화학반응인자의 변화를 확인하였다. 그 결과, 금속 원소의 상태가 화학반응인자의 상당한 변화를 결정하였다. 즉, 금속의 산화 및 산화막 두께의 증가는 활성화에너지 평균값의 상승을 초래하였으며, 금속 원자의 전기음성도는 활성화에너지 값의 표준편차의 변화를 이끌어냈다.

To minimize such loss due to aging, research on energetic materials is being actively conducted though, there are difficulties in identifying the comprehensive aging mechanisms as they focused on the respective materials. In this study, thermal and surface analysis were performed on energetic materials composed of metals(W, Ti, and Zr) and KClO4 oxidizer to solve the blind spots of this aging study. It was newly found that the metals in the hygrothermally aged compounds can cause significant changes in performance. For example, the growth in the thickness of the oxide film on the metals led to an increase in the average value of activation energy(Eα). In addition, the standard deviation of Eα tends to dependent on the type of metal, which is due to the difference in electronegativity.

키워드

과제정보

본 논문은 2022년도 BK21플러스 사업이며, 또한 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구입니다(NRF-2020R1F1A1072007, NRF-2021M1A3B8079020).

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