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

Han, Kehua; Deng, Peng; Chu, Enyi; Jiao, Qingze

doi:10.3390/app11146598

Cited by 3 publications

(4 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared to square bridge foils, arrayed bridge foils have a smaller mass and greater resistance, which better matches the discharge characteristics necessary for efficient ignition. However, precision in manufacturing is critical, as any deviation between the designed and actual array bridge foils can result in synchronization issues during the electrical explosion process [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

A Micro Bridge-Wing-Thickened Low-Energy Exploding Foil Initiator Chip

Xue,

Hu,

Wang

et al. 2024

Micromachines

View full text Add to dashboard Cite

To enhance the energy efficiency of exploding foil initiator systems (EFIs) and mitigate energy loss due to ablation in the bridge-wing regions, a low-energy bridge-wing-thickened EFI chip was designed and fabricated. Computational analysis revealed that increasing the thickness of the bridge flanks significantly reduces ablation within the bridge region during the electrical explosion. The refinement of the design led to the adoption of a bridge flank thickness of 19 μm, with the bridge area dimensions specified as 0.25 mm × 0.25 mm × 4 μm. This bridge-wing-thickened EFI chip was produced by employing micro-electro-mechanical systems (MEMS) technology and underwent rigorous performance evaluations. The empirical results closely matched the computational predictions, thereby corroborating the precision of the proposed model in simulating the temperature distribution seen during the explosion process. Notably, this enhanced EFI design achieves a flyer velocity of 3800 m/s at a condition of 900 V/0.22 μF, signifying a significant advancement in EFI system efficiency and performance.

show abstract

Section: Introductionmentioning

confidence: 99%

A Micro Bridge-Wing-Thickened Low-Energy Exploding Foil Initiator Chip

Xue,

Hu,

Wang

et al. 2024

Micromachines

View full text Add to dashboard Cite

show abstract

“…Under the action of the electric field, the insulating gap between the high-voltage electrodes is broken down and turned on, so as to realize the output of short pulse and large current, and complete the conduction and closing function of the high-voltage switch. In 2009, Baginski T A et al [15,16] designed and manufactured a planar dielectric explosion high-voltage switch triggered by Schottky diode and a micro-bridge explosion planar switch with a series structure, and proposed the idea of integrating the switch with EFI. The switch structure is shown in Figure 2.…”

Section: Introductionmentioning

confidence: 99%

“…The switch structure is shown in Figure 2. In 2009, Baginski T A et al [15,16] designed and manufactured a planar dielectric explosion high-voltage switch triggered by Schottky diode and a micro-bridge explosion planar switch with a series structure, and proposed the idea of integrating the switch with EFI. The switch structure is shown in Figure 2.…”

Section: Introductionmentioning

confidence: 99%

Research on Characteristics of Copper Foil Three-Electrode Planar Spark Gap High Voltage Switch Integrated with EFI

et al. 2022

Self Cite

View full text Add to dashboard Cite

In view of the low-energy explosion foil detonation system’s requirements for the integration technology of high-voltage switches and technical overload resistance technology, a magnetron sputtering coater is used to sputter copper film on the surface of the substrate. The thickness is 4.0 μm, the radius of the main electrode is 4 mm, the trigger electrode is 0.6 mm and 0.8 mm, and the main gaps are 0.8 mm, 1.0 mm, 1.2 mm mm, 1.8 mm, 2.0 mm, 2.2 mm, and 2.6 mm. Copper foil three-electrode planar spark gap high voltage switches are designed and manufactured; and the static self-breakdown characteristics, dynamic operating characteristics, and discharge life characteristics of the three-electrode planar spark gap high voltage switch based on copper foil are studied in this paper. The test results show that with the increase of the main electrode gap from 0.8 mm to 2.6 mm, the self-breakdown voltage of the planar spark gap switch increases, and the working voltage also increases. When the main electrode gap is a maximum of 2.6 mm, the self-breakdown voltage of the switch can reach 3480 V, which indicates that the maximum operating voltage of the switch is 3480 V. When the charging voltage is 2.0 kV, with the increase of the main electrode gap from 0.8 mm to 2.6 mm, the minimum trigger voltage value of the planar spark gap switch increases from 677 V to 1783 V (a = 0.6 mm), and from 685 V to 1766 V (a = 0.8 mm), the switch on time is 16 ns, 22 ns, 28 ns, 48 ns, 64 ns, 77 ns, 93 ns (a = 0.6 mm), and 26 ns, 34 ns, 51 ns, 67 ns, 81 ns, 102 ns (a = 0.6 mm). With the increase of the gap between the two main electrodes of the switch, the maximum static working voltage of the three-electrode plane spark gap high-voltage switch increases, the minimum trigger voltage value also increases, and the on-time of the switch gradually becomes longer. The peak current of the discharge circuit decreases and the dynamic impedance and inductive reactance of the switch also increase; as the width of the trigger electrode increases, the minimum trigger voltage decreases, the dynamic impedance and inductance decrease, and the switch operating voltage with the same parameters is higher. The easier the switch is to turn on, the lower the minimum trigger voltage. The electrode thickness of the three-electrode plane spark gap switch has a certain influence on the field strength and the service life of the switch. The results of this study provide useful references for promoting the research and development of LEEFIs.

show abstract

“…Traditionally, most of the flyer plates and the accelerating chamber used in EFI are manually pasted and aligned [ 18 ]. The assembly process is complicated, making it difficult to achieve scale production.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance Characterization of Exploding Foil Initiator Based on ODPA-ODA Polyimide Flyer

Fan

Zhan

et al. 2022

Polymers

View full text Add to dashboard Cite

The exploding foil initiator (EFI) system has been extensively used in ignition and detonation sequences and proved to be of high safety and reliability. Polyimide is considered the ideal flyer material for EFI due to its excellent performance, including thermal stability, outstanding mechanical properties, high radiation resistance, and excellent dielectric properties. In this study, we prepared the EFI based on a polyimide (ODPA-ODA) flyer, which is spin-coated and solidified on patterned copper film in situ. The electric explosion test shows that the prepared EFI has good working performance, and the 4000 V working voltage drove the flyer to reach a maximum velocity of 5096 m/s. The polyimide morphology and chemical structure after the electric explosion was observed by microscope, SEM, XPS, and FTIR, which showed that the polyimide flyer underwent thermal deformation and complex chemical reactions during an electric explosion. A large number of polyimide bonds broke to form new carbonyl compounds, and the opening of aromatic rings was accompanied by the formation of aliphatic hydrocarbon chains. The morphology and chemical structure analysis after the electric explosion test will lay a foundation for us to further understand the working principle and evolution process of polyimide (ODPA-ODA) flyer.

show abstract

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

Cited by 3 publications

References 24 publications

A Micro Bridge-Wing-Thickened Low-Energy Exploding Foil Initiator Chip

A Micro Bridge-Wing-Thickened Low-Energy Exploding Foil Initiator Chip

Research on Characteristics of Copper Foil Three-Electrode Planar Spark Gap High Voltage Switch Integrated with EFI

Preparation and Performance Characterization of Exploding Foil Initiator Based on ODPA-ODA Polyimide Flyer

Contact Info

Product

Resources

About