Study on Thermal Decomposition and Thermal Safety of Mixtures of Highly Active Aluminum Powder and Nitramine Explosive

Abstract

The newly prepared and stored highly active aluminum powder were mixed with common nitramine explosives HMX and CL-20 at a mass ratio of 1:1, respectively. The effects of the two kinds of high active aluminum powder on the thermal decomposition properties of HMX and CL-20 were investigated by differential scanning calorimetry (DSC). The thermal explosion critical temperature of the mixture of high active aluminum powder and nitramine explosive was calculated. The result shows that after joining highly active aluminium powder, highly active aluminium/nitramine explosive mixture, moderate and apparent activation energy decrease thermal decomposition peak suggests that highly active aluminium can contribute to the thermal decomposition of HMX and CL-20, compared with highly active aluminium stored after a certain period of time, the new system is highly active aluminum powder with a mixture of nitramine explosives with lower apparent activation energy, At the same time, the critical temperature of thermal explosion also decreased significantly, which indicated that the newly prepared high-activity aluminum powder had higher chemical reactivity, but its thermal safety was reduced.