Effect of Grain Size and Micromorphology of Cu Foil on the Velocity of Flyer of Exploding Foil Detonator

Kehua Han,Peng Deng,Enyi Chu,Qingjie Jiao

doi:10.3390/app11146598

Abstract

In this paper, the effect of grain size and micromorphology of Cu foil on the velocity of the flyer of an exploding foil detonator was studied. A Cu foil with different grain sizes and micromorphologies was prepared by the physical vapor deposition sputtering method. The flyer velocity of the Cu foil was measured by the photon Doppler technique (PDT). The influence of the grain size and micromorphology of the Cu foil (which was the core transducer of the exploding foil detonator) on the flyer velocity and reacted morphology was discussed. The results show that the grain size and micromorphology of the Cu film can greatly affect the velocity and morphology of the flyer. The grain size of the Cu film is more uniform, and the stimulus response in the middle area of the bridge foil is more concentrated. In addition, the current density becomes more uniform, resulting in a better explosion performance. Consequently, the speed of the formed flyer becomes higher, leading to a smoother flyer surface, which is more conductive to energy conversion.

Highlights

The shape and material nature of Cu foil, which affects the energy deposition, plasma output ability and flyer velocity, is the most researched topic on exploding foil detonators [1,2,3], which are considered as the key materials for electronic safe and arm systems for rocket motor ignition, fuzing, ammunition, and flight termination applications [4,5,6,7,8,9,10,11,12]
A Cu foil withsputtering different grain was preparedwas by the physical vapor deposition sizes and micromorphologies prepared vaporduring deposition sputtering method
The results the influence of the size and micromorphology method

Summary

Introduction

The shape and material nature of Cu foil, which affects the energy deposition, plasma output ability and flyer velocity, is the most researched topic on exploding foil detonators [1,2,3], which are considered as the key materials for electronic safe and arm systems for rocket motor ignition, fuzing, ammunition, and flight termination applications [4,5,6,7,8,9,10,11,12]. The velocity and shape of the flyer are two key factors that affect the energy-output effect of exploding foil initiators. The macroscopic properties of materials depend on their chemical composition, and, to a greater extent, on their micromorphology and grain size [18,19]

Results

Discussion

Conclusion