Kinetics of electrical conductivity of TATB detonation products as an indicator of growth of carbon nanoparticles

Abstract

Two stages of growth of electrical conductivity of detonation products of plasticbonded TATB are registered: a fast stage with a characteristic time of 0.1 µsec, which is commensurable with the time of chemical reactions, and a subsequent slow stage, which lasts for 0.5-1.0 µsec until specimen unloading begins. Under the assumption of the thermal mechanism of conductivity emergence, the second stage could be caused by an increase in temperature due to slow energy release in the course of growth of carbon nanoparticles in explosion products.

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

“…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.…”

“…The viewpoint of the existence of single particles is shared by many authors (see for example [5][6][7][8][9][10] ). In the work, 5 a dynamic model of carbon condensation at the detonation of trinitrotoluene (TNT) was proposed based on the results of the electric conductivity investigation.…”

“…The author of work 6 considered the energy release at the condensation and obtained the growth of single carbon particles during several microseconds. In the work 9 on the behavior of the electric conductivity at the detonation of triaminotrinirobenzene (TATB), the growth of carbon particles in the Taylor wave was considered supposing the thermal electric conductivity mechanism.…”

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

“…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.…”

“…Gorshkov et al [11] measured peak conductivity in a TATB detonation wave about one microsecond behind the shock front followed by a decrease attributed to the growth of solid carbon nanoparticles. Gaseous reaction products do not conduct electricity well, and thus detonation waves in nearly oxygen balanced explosives such as PETN show extremely small values of electrical conductivity [8].…”