Effect of FOX-7 on Explosion Performances and Afterburning of HMX-Based Thermobaric Explosives

Abstract

Abstract In this paper, confined explosions of HMX-based thermobaric explosives in a spherical chamber were studied. The effects of 1, 1-diamino-2, 2-dinitroethene (FOX-7) on the explosion performances and afterburning were obtained by changing its content. The results showed that the composition (HMX/FOX-7) enhanced the total impulse, but its effect on improving the initial energy and quasi-static pressure (QSP) was slight. The aluminum in thermobaric explosives burned incompletely, whereas FOX-7 promoted afterburning of aluminum particles. In addition, the promoting effect was more obvious with the increase of FOX-7 mass score in the composition. In conclusion, when the ratio of HMX to FOX-7 mass fraction in the composition was 3, the thermobaric explosive had low sensitivity and could maintain the energy level of the explosive.