Study on Electrical Explosion Properties of Cu/Ni Multilayer Exploding Foil Prepared by Magnetron Sputtering and Electroplating

Abstract

The purpose of this study was to investigate the effects of the microstructure and properties of Cu/Ni multilayer films prepared by magnetron sputtering and electroplating on the electrical explosion performance of the films. In this study, Cu/Ni multilayer films of the same thickness were prepared by electroplating (EP) and magnetron sputtering (MS), and their morphology and crystal structure were characterized by scanning electron microscope (SEM) and transmission electron microscope (TEM). XRD was used to observe the crystal structure and size of the samples. In addition, the Cu/Ni multilayer film was etched into the shape of a bridge, and the electric explosion phenomenon in the same discharge circuit of the multilayer foil obtained by the two preparation processes was tested by an electric explosion performance test system. The resistance–time curve and the energy–resistance curve during the electric explosion process were analyzed and calculated. The results showed that compared with the multilayer film prepared by the MS method, the crystal size of the multilayer film prepared by the EP method is smaller and the interface of Cu/Ni is clearer. In the electric explosion experiment, the MS samples had earlier burst times, larger peak resistances, smaller peak energies and higher ionization voltages. Through observation of the morphology of the samples after the electric explosion and combination with gas ionization theory, the internal influencing factors of the peak voltage and the relative resistance of the two samples were analyzed. The influence of the multilayer film mixing layer thickness on the sample energy conversion efficiency was analyzed by modeling the microstructure of the multilayer film exploding foil and electric heating. The results show that the thicker the mixing layer is, the more energy is distributed on the Ni, the faster the resistance increases, and the higher the energy conversion efficiency.

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

“…According to the literature [15,16], the velocity measurement of the flyer is carried out by using PDT. In the PDT speed measurement system, the fiber with a core diameter of 105 μm is used to output a laser and receive a reflected optical signal.…”

“…At present, the theoretical and experimental researches on the flyer velocity of exploding foil initiators is relatively mature, and a variety of velocity testing techniques of small flyers have been mastered. Moreover, the various parameters of the exploding foil initiator on the flyer velocity have also been investigated from a macro point of view [15][16][17]. The macroscopic properties of materials depend not only on their chemical composition, but also, to a greater extent, on their micromorphology and grain size [18,19].…”

Miniaturized Pyrotechnic Systems Meet the Performance Needs While Limiting the Environmental Impact

“…Wang and co-workers [ 21 ] present exploding foil microinitiators completely fabricated by MEMS-based engineering, which can be triggered by Metal-Oxide Semiconductor-Controlled Thyristor. Additionally, Lei and co-workers [ 22 ] integrate Cu/Ni Multilayer Exploding Foil on MEMS chips by Magnetron Sputtering and Electroplating.…”