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열/수분노화로 인한 Ti 금속 기반의 파이로 물질의 점화 성능 변화와 노화 모델 제시
오주영(Juyoung Oh),여재익(Jai-ick Yoh) 한국추진공학회 2021 한국추진공학회지 Vol.25 No.3
Titanium hydride potassium perchlorate (THPP) has played an important role as initiators of the propulsion system. However, the ‘aging’ may cause performance degradation and even give rise to a failure in the total system. In this study, various hygrothermal aging conditions were considered and the aging effects on thermodynamic and ignition characteristics of THPP are provided via thermal analysis and ignition measurements. Also, physical-chemical changes were identified by morphological analysis. In conclusion, thermal aging led to Eα decrease-high reactivity due to oxidizer decomposition whereas hygrothermal aging gave rise to an opposite tendency by fuel oxidation.