Investigation of the detonation characteristics of an aluminized explosive added with boron (B) and magnesium hydride (MgH 2 ) were undertaken and compared with the aluminized explosive of similar formulation. Firstly, the explosion heat was measured in a vacuumed calorimetric bomb, then the detonation pressure was determined by the interface velocity experiment, and finally the cylinder expansion test was performed. From the calorimetric data, the addition of B and MgH 2 into an aluminized explosive increases the heat of explosion slightly. From the detonation pressure data, the addition of B and MgH 2 appears to have no significant influence to the detonation pressure. From the cylinder test data, the detonation velocity, wall velocity, Gurney energy and detonation energy were determined. The aluminized explosive added with B and MgH 2 shows weak acceleration ability, but exhibits a stronger afterburning potential. Finally the equation of state of the detonation products was determined for different casing conditions. Conclusions about how to use B and MgH 2 in aluminized explosives to generate optimal effects are drawn.
Two new types of aluminized explosives TATB/ HMX/Al and LLM-105/Al were formulated and compared with the formerly reported TATB/Al explosives in terms of thermal stability, mechanical sensitivity, and detonation performance. Firstly, the heat of the explosion was measured and two formulations were selected as the investigated samples. Next the thermal stability was studied by simultaneous thermogravimetric analysis/differential scanning calorimetry (TGA/DSC) and thermal cook-off tests. Then the impact and friction sensitivity were measured, and finally the detonation performance was characterized by cylinder tests and particle velocity measurements of the detonation reaction zone. From the calorimetric data, the new types of explosives increase the heat of the explosion significantly. In terms of thermal stability, LLM-105/Al = 65/ 30 is more stable than TATB/HMX/Al = 50/15/30, but both of them are inferior to TATB/Al = 70/25. The impact sensitivity of the two new explosives is higher than that of TATB/Al = 70/25, and all of the samples are insensitive to friction. For detonation performance, both of the two new samples are superior to TATB/Al = 70/25, and LLM-105/Al = 65/30 exhibits the best performance that it has the highest Gurney energy, detonation velocity, and detonation pressure. Conclusions about how to use those aluminized explosives to generate optimal effects are drawn.
Searching for advanced strategies to alleviate the inherent contradiction between stability and performance has been one of the most challenging tasks in the development of high-energy-density materials (HEDMs) for centuries....
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