Email this article Initiation of explosion by high voltage discharge of pressed mixtures of sevilene with ammonium perchlorate and nitrate with addition of powdered aluminum
- Authors: Rebeko A.G.1, Ermolaev B.S.1
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Affiliations:
- N. N. Semenov Federal Research Center for Chemical Physics of the Russian Academy of Sciences
- Issue: Vol 14, No 3 (2021)
- Pages: 122-129
- Section: Articles
- URL: https://journal-vniispk.ru/2305-9117/article/view/288589
- DOI: https://doi.org/10.30826/CE21140311
- ID: 288589
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Abstract
The use of a high-voltage discharge to initiate an explosion is justified when strict synchronization of actions is required. A typical working process, which is excited by a discharge, is detonation where high-power blasting explosives with the addition of nanodispersed metals are used to reduce the discharge voltage and increase the initiation stability. However, there are technical areas (here, one can mention the use in elements of dynamic protection of tanks and in promising hypersonic accelerators of the “blast wave accelerator” type) where nanodispersed metals are unacceptable due to their low stability and high cost and instead of normal detonation, softer explosive processes are required to exclude unnecessary blasting effect on the elements of the devices. In this work, the initiation of an explosion by a high-voltage discharge in pressed mixtures of ammonium perchlorate and ammonium nitrate with sevilene with additives of various metals has been investigated. Sevilen is a thermoplastic adhesive, a copolymer of ethylene and vinyl acetate, has excellent adhesion to all components of the studied mixtures, and provides excellent conditions for pressing samples. The best result: reliable explosions in a wide range of sample porosities up to a sample with a porosity of 1% at a threshold voltage of 5.5 to 1.5 kV were obtained using mixtures of ammonium perchlorate with the addition of 20% aluminum powder with a particle size of 10 m. The replacement of ammonium perchlorate with ammonium nitrate also demonstrates good results and with the addition of other metals (copper, iron, and zinc were studied), explosions were practically absent up to the maximum voltage of 12 kV used in the present work. The most probable reason: vigorous exothermic interaction of the aluminum melt formed during electrical breakdown with ammonium perchlorate. One can try to use this effect to replace nanodispersed aluminum with a powder with micron-sized particles during high-voltage initiation of detonation of powerful secondary explosives, if a certain amount of ammonium perchlorate is introduced into the mixture.
About the authors
Alexey G. Rebeko
N. N. Semenov Federal Research Center for Chemical Physics of the Russian Academy of Sciences
Author for correspondence.
Email: alex@akmeon.com
research scientist
Russian Federation, 4 Kosygin Str., Moscow 119991Boris S. Ermolaev
N. N. Semenov Federal Research Center for Chemical Physics of the Russian Academy of Sciences
Email: boris.ermolaev44@mail.ru
Doctor of Science in physics and mathematics
Russian Federation, 4 Kosygin Str., Moscow 119991References
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