Studies on Effect of Nitrogen Rich Explosives on the Morphology, Thermal and Combustion Behaviour of B/KNO3 Composition

Abstract

AbstractThe study elucidates the influence of three nitrogen‐rich explosives viz., FOX‐7, FOX‐12, and RS‐RDX on the performance of B/KNO3/PEC igniter composition. The B/KNO3 pyrotechnic igniter compositions with 5, 10 & 15 parts of FOX‐7, FOX‐12, and RS‐RDX were successfully prepared. The compositions were evaluated in terms of surface morphology, heat output, sensitivities, flame temperature, pressure output, ignition delay, time to reach Pmax (BTPmax), and thermal analysis. The closed vessel firing data indicated higher Pmax value and lower BTPmax for FOX‐12 and FOX‐7 based composition. The addition of FOX‐12 and FOX‐7 also reduces the decomposition temperature of B/KNO3 composition without affecting friction and spark sensitivities. The composition having 15 parts RSRDX is the most insensitive to impact among all. Therefore, the addition of insensitive high explosives like RS‐RDX, FOX‐7and FOX‐12 is useful to improve the performance of the igniter composition to achieve low BTPmax and increased pressure output. Optimum performance is exhibited by RS‐RDX‐based compositions.