Optimization of Al/PTFE applied to detonation network used for micro shaped charge warhead.

Abstract

In order to improve the detonation performance of the explosive network on the basis of achieving high safety and reliable detonation, 3,4-dinitrofurazanyl oxyfurazan (DNTF) was used as the main explosive, glycidyl azide polymer(GAP) was used as the binder, and other auxiliary agents were added to the basic charge formula. Then, polytetrafluoroethylene (PTFE) and aluminum (Al) were introduced to further enhance the output power of the charge formula. The influence of two introduction methods of PTFE and Al was evaluated: directly mechanically mixing method and activation method by metal ball milling. A variety of tests such as particle size, morphology, detonation performance in groove were carried out to study the difference between mixed Al/PTFE and milling activated Al/PTFE. The experiment showed that particle size becomes smaller and Al/PTFE were well compounded. Moreover, results showed that the charge formula with milling activated Al/PTFE possessed good propagation reliability in micro linear groove and stronger external expansion capability. These properties were vital for the charge formula to be applied to the complex explosive circuits used for micro shaped charge warhead.