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Improved Exploding Properties of Al/Cu Multilayer Initiators
Author(s) -
Wang Yao,
Guo Fei,
Wang Wanjun,
Li Yong,
Zhou Qin,
Xing Zongren,
Wang Liang,
Gao Yuan
Publication year - 2020
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.202000047
Subject(s) - materials science , kinetic energy , shearing (physics) , plasma , sputtering , sputter deposition , ignition system , composite number , copper , composite material , chemical engineering , optoelectronics , analytical chemistry (journal) , nanotechnology , thin film , chemistry , metallurgy , physics , thermodynamics , quantum mechanics , engineering , chromatography
Reactive multilayer films (RMFs) are widely used for energetic initiator applications, the reaction behavior and mechanism are systematically researched for ignition. Recently, Investigation into exploding plasma fields has been carried out based on Al/Ni RMFs. However, few papers are concerned about Al/Cu multilayers for exploding initiators. In this paper, an investigation on the influence of Al/Cu multilayers additives on initiators is described in detail. The Al/Cu multilayers are deposited by magnetron sputtering technology and their structure is confirmed by scanning electron microscopy. The periodic multilayer structure with controlled thickness is visible. The initiator containing Al/Cu multilayers exhibits improved exploding properties with a short exploding time, low matching charging voltages, and high flyer velocities in comparison with Cu layers or Al layer‐based initiators. Meanwhile, the flyer kinetic energy increase of up to 30 mJ indicates that this improvement could not come from the Al−Cu alloying reaction alone. The 1‐D non‐stationary acceleration model confirms that the composite electrical behavior is a factor contributing to improved flyer kinetic energy. The ultra‐high‐speed camera system is employed to observe the flyer launching process accelerated by the exploding plasma. The smaller barrel diameter is beneficial for controlling the shearing process to keep good integrity of the flyer. Overall, the electrical exploding properties of initiators can be enhanced substantially based on Al/Cu multilayers.