Laser Initiation of PETN with Inclusions of Aluminum Nanoparticles under Static Pressure
B. P. Aduev, D. R. Nurmukhametov, G. M. Belokurov, A. A. Zvekov, N. V. Nelyubina
Institute of Coal Chemistry and Material Science, Federal Research Center of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences, Kemerovo, 650000 Russia
Keywords: лазерное инициирование, тэн, взрыв, газодинамическая разгрузка, дислокации, наночастицы алюминия, оптоакустика, laser initiation, PETN, explosion, gas-dynamic unload, dislocation, aluminum nanoparticles, optoacoustics
Abstract
This paper describes the experimental measurement of thresholds of explosive decomposition of PETN with inclusions of aluminum nanoparticles (an average particle diameter of 100 nm) with a static pressure of 0-0.288 GPa applied to the samples under the action of the first harmonic of pulsed (14 ns) neodymium laser. Amplitudes of optoacoustic signals as a function of concentration of inclusions in the samples with a fixed density of laser initiation energy are measured. There is a significant decrease in the initiation threshold, which is due to the fact that a gas-dynamic load is blocked and the sample density increases.
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