Nanocarbon mesh in the flame of aromatic compounds

The soot in the flame of the pyrotechnic composition is presented in a variety of shapes and structures. Part of the dispersed particles consists entirely of carbon. The sizes of such particles are in the submicron range. Another part of the particles contains carbon in the form of nanostructures - needles and tubes. A detailed study of the morphology and chemical composition of dispersed particles on optical and scanning electron microscopes showed the existence of yet another unidentified species of particles - tuba. The resulting formations are micron-sized and retain the properties of nanostructures.

Influence of the Pyrotechnic Igniter Composition Aging on Explosion Parameters of Dispersed Dusts

A commercially available pyrotechnic igniter was used according to the EN 14034 and ASTM E1226a Standards to study the explosiveness of dispersed dusts. Its pyrotechnic composition consists of 1.2 g of zirconium (40% wt.), barium peroxide (30% wt.) and barium nitrate (30% wt.). The energy released during the combustion of that amount of composition is 5 kJ. The article investigates the influence of aging of the pyrotechnic composition in the igniter on its initiation parameters. In the study, igniters of different years from date of manufacture were used: Igniter 1, manufactured in 2021 (less than 1 year from date of manufacture), and Igniter 2 (more than 2 years from date of manufacture). The study was performed in the KV 150M2 explosion chamber with a volume of 365 L and the 20 L sphere chamber with a volume of 20 L. A standard sample of Lycopodium clavatum was used in the KV 150M2 explosion chamber. Magnesium and benzoic acid were used as the samples in the 20 L sphere explosion chamber. The experiment showed that the explosion pressure Pmax of the igniter with more than 2 years from date of manufacture decreased by up to 10%, while the value of the explosion constant Kst decreased by up to 40%. The attained results proved that aging of igniters affects their explosion parameters and measurement accuracy.

SN-CUO-ARABIC GUM COMPOSITION FOR RED TRACER PROJECTILE AMMUNITION POTENTIAL

<div><p class="Els-history-head">Fundamentally, tracer projectile material based on pyrotechnic composition, and where the pyrotechnic was generally composed of fuel, oxidizer, and binder. The tin (Sn) material is one of the candidates for fuel material because tin has a low melting point, so this composition can ignite at low temperature, while the copper oxide (CuO) can emit the orange-red spectrum. This study aims to evaluate the thermal and spectrum character of Sn-CuO-AG-based composition. The characterization data of these samples was evaluated by tests of morphology and phase, enthalpy change, calorie energy, and spectrum emission. Based on this data, the 17Sn-68CuO-15AG sample was emitted a strong red color too, but this sample has a high or the longest exothermic process. Furthermore, the 27Sn-58CuO-15AG sample has emitted a weak red color with medium exothermic energy. Generally, the 22Sn-63CuO-15AG is more suitable than the two other compositions for the tracer projectile composition of ammunition, this material emits a strong red spectrum and low-calorie energy.</p></div>

Инициирование детонации световым импульсом в тонком заряде пиротехнического состава ВС-2

The paper presents the results of the initiation of film charges of pyrotechnic composition VS-2 by flash lamps. It is shown for the first time that the pulsed radiation of flash lamps causes detonation in the film of composition VS-2, the velocity of which is ~ 4300 m / s, and in the aluminum witness plate, deformation, the depth of which depends on the thickness of the film charge of composition VS-2.

FEATURES OF INITIATION OF FILM CHARGES OF POLYMER-CONTAINING PYROTECHNIC COMPOSITION OF VS-2 BY FLASH LAMP «EVIS-3»

The paper presents the results of interaction of film charges of pyrotechnic composition VS-2 with incoherent radiation of flash lamps. It is shown that the pulsed light radiation of flash lamp «EVIS-3» causes detonation in the film of the photosensitive pyrotechnic fulmination of VS-2 at a speed from 4200 to 4500 m/s, and in the aluminum plate-witness – deformation, the value of which depends on the thickness of the film charge of the pyrotechnic composition of VS-2

FEATURES OF INITIATION OF FILM CHARGES OF POLYMER-CONTAINING PYROTECHNIC COMPOSITION OF VS-2 BY FLASH LAMP «EVIS-3»

The paper presents the results of interaction of film charges of pyrotechnic composition VS-2 with incoherent radiation of flash lamps. It is shown that the pulsed light radiation of flash lamp «EVIS-3» causes detonation in the film of the photosensitive pyrotechnic fulmination of VS-2 at a speed from 4200 to 4500 m/s, and in the aluminum plate-witness – deformation, the value of which depends on the thickness of the film charge of the pyrotechnic composition of VS-2