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This article is cited in 1 scientific paper (total in 1 paper)
Initiation of nanothermites by electric spark
A. Yu. Dolgoborodovabc, B. D. Yankovskiia, P. V. Arsenova, S. Yu. Anan'eva, L. I. Grishinac, G. E. Val'yanoa, T. I. Borodinaa, G. S. Vakorinaa a Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, Russia
b N.N. Semenov Federal Research Center for Chemical Physics Russian Academy of Sciences, Moscow
c National Engineering Physics Institute "MEPhI", Moscow
Abstract:
Electrospark initiation of thermite mixtures based on nanosized powders of aluminum and copper oxide has been studied. Data on the effect of the energy of an electric spark discharge on the ignition delay have been obtained. When initiating long cylindrical samples of mixtures with a low-current spark, two types of unsteady combustion were observed. The first type is characterized by an exponential nature of the establishment of a constant burning rate. The second type is characterized by regions with incomplete reaction along the main direction of propagation. To obtain stationary modes of a thermite mixture with a minimum ignition delay time, it is necessary to use a discharge with energy of more than 5 mJ per 1 mm$^2$ mixture surface.
Keywords:
thermite compositions, nanothermites, electrospark initiation, combustion, energy density.
Received: 29.11.2022 Revised: 14.12.2022
Citation:
A. Yu. Dolgoborodov, B. D. Yankovskii, P. V. Arsenov, S. Yu. Anan'ev, L. I. Grishin, G. E. Val'yano, T. I. Borodina, G. S. Vakorina, “Initiation of nanothermites by electric spark”, Fizika Goreniya i Vzryva, 59:4 (2023), 85–92; Combustion, Explosion and Shock Waves, 59:4 (2023), 471–478
Linking options:
https://www.mathnet.ru/eng/fgv963 https://www.mathnet.ru/eng/fgv/v59/i4/p85
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