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Combustion, Explosion and Shock Waves

2022 year, number 2

Effect of Binders on Combustion of the Aluminum Powder

Y.-G. Liu1,2, X. Tian2, L. Yiu3, P.-W. Chen1, X.-B. Ji2
1Beijing Institute of Technology, Beijing, 100081 China
2Institute of Chemical Material, CAEP, Mianyang, 621900 China
3Sichuan Hongbo Science and Technology Co. Ltd, Mianyang, 621000 China
Keywords: combustion heat, aluminum powder, binder, laser ignition


Dioctyl sebacate (DOS), paraffin (PW), fluororubber (FR), and polyurethane (PU) are widely used as binders in aluminized propellants and explosives. In this study, ignition and combustion of aluminum powders coated with DOS, PW, FR, and PU are investigated. The flame speeds of the aluminum powders coated with DOS, PW, and PU are found to decrease with an increase in the content of these binders. The flame speed of the aluminum powder coated with FR is greater than those of the aluminum powders coated with DOS, PW, and PU. In this case, combustion improvement is due to the reaction between the alumina shell and FR.