Understanding the effects of hygrothermal aging on thermo-chemical behaviour of Zr-Ni based pyrotechnic delay composition

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

“…The aging process is however slow, and its impact on the pyrotechnic composition will take up much time before becoming visible. Therefore, scientists employed accelerated aging techniques [13][14][15][16][17], which enable us to observe the effect of an experimental (non-natural) stress over a short time frame with which one can estimate the lifetime of the aged samples [18][19][20][21]. 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.…”

“…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.…”

Insight into the Effect of Moisture and Thermal Aging on the Degradation of a Pyrotechnic Igniter Composition through Thermogravimetric Kinetics Coupled with Deconvolution Approach

“…Recently, the Kinetics Committee of the International Confederation for Themal Analysis and Calorimetry (ICTAC) has recommended the appropriate kinetic methodologies, which include isoconversional analysis, distributed reactivity analysis, deconvolution analysis, and multistep model‐fitting, for the analysis of multistep processes such as the carbon nanomaterials combustion, biomass pyrolysis, polymer decompostion [17] . However, to the best knowledge of the authors, only very few research works, which focused on the use of multistep thermal decomposition of PCs, have been reported for which interesting results and detailed information are provided for the aged Ti‐based PCs, [18] Zr‐based PCs, [8,13c] W‐Based PCs [19] . However, although the kinetic parameters of the unaged Mg‐based PCs have been determined, [20] a complete understanding of their reaction mechanisms is still limited and no details data concerning the effect of the aging process are found in the literature.…”