Investigation of the reaction zone in heterogeneous explosives substances using an electrical conductivity method

Ершов, А. П.; Satonkina, N. P.

doi:10.1007/s10573-009-0027-3

Cited by 20 publications

(26 citation statements)

References 7 publications

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“…24 Following the argument of chemoionization, conductivity should be the higher the faster the initial substance decomposes, that is the maximum of conductivity σ max should be close to the detonation front. According to our data for HEs with well defined conductivity peak, σ max is reached at about the half of duration of the zone of increased conductivity, 4,19,22,[25][26][27] i.e., far from the front which contradicts to the relation of the conductivity σ and the intensity of reactions. On the other hand, the number of elementary chemical reactions per unit time increases with the decrease of the duration of the reaction zone, and, according to Hariton's principle, the duration of the reaction zone is proportional to the critical diameter.…”

Section: A Chemoionizationcontrasting

confidence: 56%

“…The existence of a correlation between the conductivity σ at the CJ point and the amount of condensed carbon was shown in works. 20,21 There exist also works where the value of σ CJ is explained by the ionic conductivity 22 and by the thermal ionization. 9 Let us consider different conductivity mechanisms from the standpoint of the experimental data presented.…”

Section: Experimental Data On the Behavior Of Electric Conductivimentioning

confidence: 99%

“…19,22,23 Chemoionization is thought to be the most probable cause of conductivity in the chemical peak region. The concentration of charge carriers n due to chemoionization is by definition connected with the number of reacted molecules.…”

Section: A Chemoionizationmentioning

confidence: 99%

“…4,19,22,[25][26][27] The behavior of temperature is more complex. Figure 2 shows the temperature in the CJ point for different density of HE.…”

Section: B Relation Between Electric Conductivity and Temperaturementioning

confidence: 99%

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On the mechanism of carbon nanostructures formation at reaction of organic compounds at high pressure and temperature

Satonkina

Медведев

2017

AIP Advances

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Based on the analysis of the data on the behavior of electric conductivity at the detonation of condensed high explosives (HEs) with the composition CHNO and the carbon mass fraction higher than 0.1, the conclusion was made of the presence of long carbon nanostructures. These structures penetrate all the space of reacting HE. The structures are formed already in the chemical peak region, and they evolve along the detonation wave.

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Section: A Chemoionizationcontrasting

confidence: 56%

Section: Experimental Data On the Behavior Of Electric Conductivimentioning

confidence: 99%

Section: A Chemoionizationmentioning

confidence: 99%

“…4,19,22,[25][26][27] The behavior of temperature is more complex. Figure 2 shows the temperature in the CJ point for different density of HE.…”

Section: B Relation Between Electric Conductivity and Temperaturementioning

confidence: 99%

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On the mechanism of carbon nanostructures formation at reaction of organic compounds at high pressure and temperature

Satonkina

Медведев

2017

AIP Advances

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“…Unreacted organic explosives are extremely poor electrical conductors [8]. Time resolved measurements of detonating solid explosives from Hayes' classic experiments [8] to recent studies [9][10][11] have shown that the amount of electrical conduction in a detonation wave is directly proportional to the amount of solid carbon produced during the chemical decomposition.…”

Section: Electrical Conduction In the Reacting Explosive Mixturementioning

confidence: 99%

Effect of electric fields on the reaction rates in shock initiating and detonating solid explosives

Tarver

2012

AIP Conference Proceedings

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Abstract. The presence of a strong electric field has been demonstrated to effect the shock initiation and detonation wave propagation of solid high explosives. Several mechanisms have been proposed to explain the observed increased shock sensitivity, increased detonation velocity, and decreased failure diameter of certain explosives. The most likely chemical mechanism is postulated to be the excitation of some of the explosive molecules and/or intermediate reaction products to higher energy electronic states, which rapidly transition nonradiatively to the ground electronic state with excited vibrational states. This vibrational excitation increases the reaction rates of the explosive decomposition chain reactions. The resulting shorter duration reaction zone causes faster shock to detonation transition, decreased failure thickness, and increased detonation velocity for a specific charge diameter.

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Effects of Aluminum Content on TNT Detonation and Aluminum Combustion using Electrical Conductivity Measurements

Zhou

Nie

Zeng

et al. 2016

Propellants Explo Pyrotec

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To improve the understanding how aluminum contributes in non‐ideal explosive mixtures, cast‐cured formulations were analyzed in a series of electrical conductivity experiments. Five types of TNT‐based aluminized explosives, with aluminum mass fractions from 0 % to 20 % were considered in this study. The electrical conductivity of the detonation products in aluminized explosives was measured using an improved conductivity measurement method. The conductivity measurement results show that the detonation process of TNT‐based aluminized explosives can be divided into two stages: the first stage is the detonation reaction of TNT, and the second stage is the combustion reaction of aluminum with the detonation products. In the first stage, the duration of the TNT detonation increases with increased aluminum content; examination of the peak conductivities of the explosives with various aluminum contents indicated that a higher aluminum content is associated with a lower peak conductivity. Additionally, the ignition time of Al in the second stage is also determined. This work not only presents a means for studying the detonation process of aluminized explosives at 0–2.21 μs, but it also verified the relationship between the aluminum content and electrical conductivity in detonation products.

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Investigation of the reaction zone in heterogeneous explosives substances using an electrical conductivity method

Cited by 20 publications

References 7 publications

On the mechanism of carbon nanostructures formation at reaction of organic compounds at high pressure and temperature

On the mechanism of carbon nanostructures formation at reaction of organic compounds at high pressure and temperature

Effect of electric fields on the reaction rates in shock initiating and detonating solid explosives

Effects of Aluminum Content on TNT Detonation and Aluminum Combustion using Electrical Conductivity Measurements

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