Detonation Reaction Characteristics for CL-20 and CL-20-based Aluminized Mixed Explosives

作者：Liu, Danyang; Chen, Lang^*; Wang, Chen; Wu, Junying

来源：Central European Journal of Energetic Materials, 2017, 14(3): 573-588.

DOI：10.22211/cejem/75114

• detonation reaction zone
• aluminum reaction
• interfacial particle velocity
• interferometry

The interfacial particle velocities for CL-20 and CL-20-based aluminized mixed explosives were measured by interferometry in order to analyze the aluminum reactions in the latter. The reaction characteristics were obtained, as well as a better understanding of the effects of aluminum powder on the detonation reaction zone length. Two functions were used to fit the particle velocity-time profiles, and their intersection was the corresponding Chapman-Jouget (CJ) point. From these profiles, the detonation reaction zone length and the aluminum reaction were then analyzed. CL-20-based explosives have a short reaction time (48 ns for a high CL-20 content), while the reaction time of CL-20/Al explosives increased with the aluminum content and particle size. Micron-scale aluminum particles barely reacted in the CL-20 detonation reaction zone, but instead reacted with the detonation products after the CJ point. This reduced the detonation pressure; however, the aluminum reaction can slow down the decrease in particle velocities. The start times of small-particle aluminum reactions were earlier than those of the larger particles. The 2-3-mu m aluminum particles start to react within 1 mu s after the CJ point, while the 200-nm particles may start to react in the reaction zone.

• 出版日期2017
• 单位北京理工大学