Effect of Ultrafine Powders Al/B, Ti/B, AND Fe/B on the Ignition and Combustion Characteristics of a High-Energy Material
I. V. Sorokin1, A. G. Korotkikh2,3
1Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2National Research Tomsk Polytechnic University, Tomsk, Russia
3National Research Tomsk State University, Tomsk, Russia
Keywords: high-energy material, amorphous boron, energy-intensive metal fuel, oxidation, ignition delay time, burning rate
Abstract
The ignition and combustion characteristics of a high-energy material containing ammonium perchlorate, butadiene rubber, and an ultrafine powder mixture of aluminum, titanium, or iron with amorphous boron are presented. An experimental testbed, a CO2 laser, and a constant-pressure bomb are used to measure the ignition delay time and burning rate of the high-energy material while varying the heat flux density and pressure in the chamber. It is shown that replacing amorphous boron with ultrafine Al/B, Ti/B, or Fe/B in the material reduces the heating time and the moment of flame appearance on the propellant surface due to an increase in the reaction rate and a decrease in the oxidation temperature of these mixtures on the surface of the reaction layer. In this case, the burning rate of the high-energy materials with Me/B at excess pressures increases significantly (up to 240% for Al/B-HEM and up to 120% for Ti/B-HEM at a pressure of 5.0 MPa).
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