The effect of Mg(BH4)2 on the energy characteristics of RDX based aluminized explosives

Abstract

This paper mainly discusses the effect of Mg(BH4)2 on RDX-based aluminized explosives' energy characteristics. RDX/Mg(BH4)2, RDX/Al/Mg(BH4)2, RDX/AP/Al/Mg(BH4)2 mixed explosives were prepared by molding power method. The influence of energy storage materials on the performance of mixed explosives was discussed by adjusting the proportion of Mg(BH4)2. The impact sensitivity, friction sensitivity, detonation heat experiment, and XPS experiment were carried out for the mixed explosive. The mechanical sensitivity, energy characteristics, and the products after the explosion of the mixed explosive were analyzed. Through the above experiments, it is concluded that Mg(BH4)2 can effectively improve the energy characteristics of RDX, but its safety will become worse after being prepared by a simple mixing method, and the use of the molding power method can effectively reduce the sensitivity. As the mass fraction of Mg(BH4)2 increases and Al decreases, the detonation heat of explosives decreases gradually. Mg(BH4)2 made the oxygen balance of mixed explosives more negative has been considered as a potential reason. Analysis of the detonation heat solid products by XPS found that, unlike our expected results, the product contained a large amount of low calorific value of B2O2 instead of B2O3, which may be a crucial reason. This paper provides a reference for the application of Mg(BH4)2 in energetic materials and is of great significance for the development and application of new materials in energetic materials.