Ignition and combustion behavior of zirconium-based pyrotechnic igniters and pyrotechnic delays under aging

Towards a Deep Insight Into Thermal and Moisture Aging of Silicon‐Based Pyrotechnic Delay Composition Through a Combination of Spectroscopic Techniques – Principal Component Analysis Approaches

“…However, before the practical use of such delay compositions, one can expect that these materials were stored for an unknown or maybe extended period of time. Unfortunately, during this storage time, these compositions age and tend to lose their original performance due to aging-induced chemical reactions of the chemicals within the formulation for instance hydrolysis and/or oxidation [8][9][10]. The latter will result in functioning issues such as a longer burning time or incomplete combustion due to a low combustion rate [11,12].…”

“…Several works published so far aimed at understanding the aging of pyrotechnic compositions [8,17,[22][23][24] under various aging conditions, i. e., temperature and humidity. Despite that, only a few of them have studied the aging of pyrotechnic delay compositions [8,10,16,25,26]. Yoh's research group has been quite involved in the research area concerning the aging of pyrotechnic delay compositions [10,16,25,26].…”

“…Despite that, only a few of them have studied the aging of pyrotechnic delay compositions [8,10,16,25,26]. Yoh's research group has been quite involved in the research area concerning the aging of pyrotechnic delay compositions [10,16,25,26]. They studied compositions based on zirconium and zirconium-nickel alloy as fuel together with potassium perchlorate (KClO 4 ), barium chromate (BaCrO 4 ), and iron oxide (Fe 2 O 3 ) as oxidizers [10,16].…”

“…Yoh's research group has been quite involved in the research area concerning the aging of pyrotechnic delay compositions [10,16,25,26]. They studied compositions based on zirconium and zirconium-nickel alloy as fuel together with potassium perchlorate (KClO 4 ), barium chromate (BaCrO 4 ), and iron oxide (Fe 2 O 3 ) as oxidizers [10,16]. It has been reported that the accelerated aging of such delays may lead to a corrosion process by a pre-oxidation of the metal fuel, causing a significant increase in the ignition delay, while hydrothermally aged samples did not undergo ignition at all.…”

Prevention of Previous Operation of Charges of Pyrotechnical Products Based on Mixtures of Magnesium, Aluminum Powder and Metal Waste in the Conditions of External Thermal Actions

“…The paper [15][16] provides data on the main characteristics of the flames of solid pyrotechnic compositions based on aluminium powders and ammonium perchlorate (on the temperature Тb and the composition of combustion products, the content of high-temperature condensate gc, etc.). It was established that the specified characteristics depend most significantly on the ratio of components in the initial mixtures.…”