The Effect of CuO on the Thermal Behavior and Combustion Features of Pyrotechnic Compositions with AN/MgAl
Ketegenov T. Nadirov R. Teltayev B. Milikhat B. Kalmuratova B. Keiichi H. Kamunur K.
February 2024Multidisciplinary Digital Publishing Institute (MDPI)
Sustainability (Switzerland)
2024#16Issue 4
Ammonium nitrate (AN) is of considerable interest to researchers in developing new types of energetic mixtures due to the release of environmentally benign gaseous products during burning and thermal decomposition. However, poor ignition and a low burning rate require special additives to speed up this process. The advantage of this research is the use of high-energy aluminum-based alloys as fuel to compensate for the disadvantages of AN. In addition, the effect of copper oxide (CuO) on the burning kinetics and thermodynamics of the energetic mixture based on ammonium nitrate–magnesium–aluminum alloys (AN/MgAl) is investigated. Alloys based on aluminum were created through a process of high-temperature diffusion welding, conducted in an environment of argon gas. The structure and thermal characteristics of alloys are determined by X-ray diffraction, scanning electron microscopy, and DTA-TG analyses. It has been found that CuO has significant effects on the thermal decomposition of an AN/MgAl-based energetic mixture by shifting the decomposition temperature from 269.33 °C to 261.34 °C and decreasing the activation energy from 91.41 kJ mol−1 to 89.26 kJ mol−1. Adding CuO reduced the pressure deflagration limit from 2 MPa to 1 MPa, and the linear burning rate of the AN/MgAl energetic mixture increased approximately twice (rb = 6.17 mm/s vs. rb = 15.44 mm/s, at a chamber pressure of P0 = 5 MPa).
ammonium nitrate , burning rate , copper oxide , Mg–Al alloys , pyrotechnic mixtures
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Institute of Combustion Problems, Almaty, 050012, Kazakhstan
Faculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
U. Joldasbekov Institute of Mechanics and Engineering, Almaty, 050040, Kazakhstan
Japan Aerospace Exploration Agency, Sagamihara, 252-5210, Japan
Institute of Combustion Problems
Faculty of Chemistry and Chemical Technology
U. Joldasbekov Institute of Mechanics and Engineering
Japan Aerospace Exploration Agency
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