Thermally Stable and Low‐Sensitive Aluminized Explosives with Improved Detonation Performance

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 se...

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Bibliographic Details
Published in:Propellants, explosives, pyrotechnics explosives, pyrotechnics, 2021-09, Vol.46 (9), p.1428-1435
Main Authors: He, Songwei, Tan, Kaiyuan, Song, Qingguan, He, Guansong, Cao, Wei
Format: Article
Language:English
Subjects:
aluminized explosive
Aluminizing
Detonation
detonation performance
Differential scanning calorimetry
Explosive impact tests
Explosives
Heat measurement
HMX
LLM-105
low sensitivity
Sensitivity
Stability analysis
TATB
Thermal stability
Thermogravimetric analysis
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Summary: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.
ISSN:0721-3115
1521-4087
DOI:10.1002/prep.202100047