A Miniature Device for Shock Initiation of Hexanitrostilbene by High‐Speed Flyer

An emulsion is a multiphase dispersion system in which one or more liquids are dispersed in the form of particles in another immiscible liquid. Emulsion method has been applied for preparation of binder system via oil in water (O/W) emulsions. The formulation contains: 40 g 12 % a solution of polyvinyl alcohol (PVA) in water, 15 g 7.5 % a solution of Viton A (vinylidene hexafluoropropene copolymer) in ethyl acetate, 0.25 g sodium dodecyl sulfate (SDS) and 0.25 g Tween‐80.The emulsion as a binder system, sub‐micro CL‐20 (prepared by the ball milling method) as the body explosives to prepared CL‐20 based explosive ink (CL‐20 88 % concentration). Deposition of explosive inks via DIW technology and its properties were characterized. The results showed that the composite has fewer internal defects and low impact sensitivity, the crystal type has no change, critical detonation size is around 1×0.17 mm and detonation velocity is 8079 m/s.

Section: Introductionmentioning

confidence: 99%

CL‐20 based Explosive Ink of Emulsion Binder System for Direct Ink Writing

Han

et al. 2018

“…Secondly, the conductivity and luminescence data of a solid body are necessary for the development of mechanisms and mathematical models of the ignition of condensed EM. Finally, laser initiation of energetic materials is studied with the aim of creation of light detonators, effective and safe ignitors for future weapon systems and rocket engines [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Ignition of Organic Explosive Materials by a Copper Oxide Film Absorbing a Laser Pulse

Dolgachev

Khaneft

Mitrofanov

2018

This work present experimental results of PETN ignition and of numerical simulations of PETN, RDX, HMX, and TATB ignition by a copper oxide (CuO) film heated using a millisecond fiber laser YLS‐150. It was established that the dynamic ignition threshold of organic explosive materials (EM) in a three‐layer system (glass – CuO – EM) by a laser pulse has a minimum at the CuO film thickness of 12 μm . The density of the critical ignition energy of EM is increasing in the sequence of PETN, RDX, HMX, and TATB with PETN having the smallest and TATB having the highest density of the critical ignition energy.

“…Interest in the ignition of energetic materials by the luminous flux has continued to this day. The emergence of experimental and theoretical work is associated with the use of laser systems for EM initiation, as well as studying the mechanism of EM ignition for the purpose of directional control of the EM threshold initiation energy by laser radiation [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Decomposition of CuO Film on Ignition of Organic Explosives by a Laser Pulse

Khaneft

Mitrofanov

Зверев

2019

This work presents experimental results of the PETN ignition in a three-layer system: glass -copper oxide ( CuO) -explosive materials (EM) and results of numerical simulations of the ignition of PETN, RDX, HMX, and TATB with a CuO film heated by a YLS-150 fiber laser with a pulse duration of 20 ms. In the numerical simulations, the endothermic reaction of decomposition of the CuO film and decomposition reaction of EM were taken into account. It has been established that the endothermic effect of the CuO decomposition reaction increases the dynamic ignition delay time of EM. The expression for an estimation of width of a reaction layer in EM at heating by a constant heat stream is obtained. Calculations have shown that the dynamic threshold of ignition of organic explosives by laser pulse in a three-layer system (glass -CuO -EM) has a minimum for the thickness of the copper oxide film of 5 mm. The density of the critical ignition energy of an explosive laser pulse increases in the sequence of PETN, RDX, HMX, and TATB. The calculated dependence of the PETN dynamic ignition delay time on the thickness of the CuO film is consistent with the experimental data.