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This article is cited in 6 scientific papers (total in 6 papers)
Gases and Fluids
Effect of variations in the gas-dynamic unloading on the laser initiation of the PETN–aluminum composite
B. P. Aduev, D. R. Nurmuhametov, A. A. Zvekov, I. Yu. Liskov, G. M. Belokurov, N. V. Nel’ubina Institute of Coal Chemistry and Material Science, Siberian Branch, Russian Academy of Sciences, Kemerovo, Russia
Abstract:
Thresholds of explosive decomposition $H_{cr}$ under irradiation using the first harmonic of a pulsed neodymium laser (14 ns) are experimentally determined for pentaerythritol tetranitrate (PETN) with aluminum nanoparticles (100 nm) at concentrations ranging from 0.05 to 1 wt %. Amplitudes of optoacoustic signals are measured versus concentrations of impurities in the sample at a fixed laser fluence. The experiments are performed in two regimes. In the first one, the irradiated surface of the sample is covered with a finite-weight glass plate that impedes the gas-dynamic unloading. In the second regime, an external pressure of no less than 10$^7$ Pa is applied to the glass plate to prevent the gas-dynamic unloading. The interpretation of the experimental effects is proven by the results of theoretical simulation.
Received: 12.07.2017 Revised: 04.09.2018
Citation:
B. P. Aduev, D. R. Nurmuhametov, A. A. Zvekov, I. Yu. Liskov, G. M. Belokurov, N. V. Nel’ubina, “Effect of variations in the gas-dynamic unloading on the laser initiation of the PETN–aluminum composite”, Zhurnal Tekhnicheskoi Fiziki, 89:2 (2019), 174–178; Tech. Phys., 64:2 (2019), 143–147
Linking options:
https://www.mathnet.ru/eng/jtf5684 https://www.mathnet.ru/eng/jtf/v89/i2/p174
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