Achieving superior ignition and combustion performance of Al/I 2 O 5 biocidal nanoenergetic materials by CuO addition - Équipe Nano-ingénierie et intégration des oxydes métalliques et de leurs interfaces Access content directly
Journal Articles Combustion and Flame Year : 2024

Achieving superior ignition and combustion performance of Al/I 2 O 5 biocidal nanoenergetic materials by CuO addition

Abstract

It was found that all iodine-containing biocidal energetic materials has a relatively long ignition delay upon combustion. A shorter ignition time (from the thermal trigger to the peak pressure) for Al/iodine oxides might further boost their combustion performance due to their high reactivity and high gas release rate. To achieve this goal, a secondary oxidizer, CuO, is incorporated into Al/I 2 O 5 at different mass content keeping the overall thermite stoichiometry constant. The ternary Al/I 2 O 5 /CuO thermites were characterized in ignition using a T-jump ignition temperature set up, and in combustion in a constant volume combustion cell. Consequently, all ternary thermites outperform traditional Al/I 2 O 5 counterpart with an optimum for 80/20 wt% of I 2 O 5 /CuO. This later composition ignites in 0.01 ms (30 times shorter than Al/I 2 O 5) and produces peak pressure and pressurization rate of ~4 and 26 times greater than those produced by Al/I 2 O 5. A series of additional characterizations using Fourier-transform infrared spectroscopy, Differential Scanning Calorimetry, Electrical/Thermal conductivity measurement, etc., permitted to unravel the cause of such improvement and to propose a reaction mechanism for this ternary Al/I 2 O 5 /CuO system. From an applications point of view, this study proposes a facile, inexpensive and efficient way to enhance the combustion performance of Al/I 2 O 5 biocidal nanoenergetic materials. Novelty and significance statement: we incorporated a secondary oxidizer CuO into Al/I 2 O 5 system with the goal to shorten its ignition delay without penalizing their combustion performance (pressure development). Surprisingly the CuO addition not only eliminated the ignition delay of Al/I 2 O 5 in a constant-volume combustion cell but also demonstrated significant enhancement on peak pressures, pressurization rates, flame temperatures and
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Dates and versions

hal-04268063 , version 1 (02-11-2023)

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Tao Wu, Erik Hagen, Haiyang Wang, Dylan Kline, Michael Zachariah, et al.. Achieving superior ignition and combustion performance of Al/I 2 O 5 biocidal nanoenergetic materials by CuO addition. Combustion and Flame, 2024, 259, pp.113190. ⟨10.1016/j.combustflame.2023.113190⟩. ⟨hal-04268063⟩
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