The Current Density and Energy Input in Electrothermal Explosion of Metallic Powders

Gang Yi Zhou; Xin Long Dong; Jun Liu

doi:10.4028/www.scientific.net/AMM.37-38.1429

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 37-38The Current Density and Energy Input in...

The Current Density and Energy Input in Electrothermal Explosion of Metallic Powders

Abstract:

This paper presents a study on the electrothermal explosion of metallic powders produced by a pulsed high voltage generator, which is a fast-discharge capacitive storage device. The character of instantaneous current, voltage were measured and studied. The energy-utilization ratio was calculated and analyzed. It is shown that the maximum current density and current rise rate obtained during electrothermal explosion of Cu powder were of the order of 10⁸A/cm² and 10¹³A/s, respectively. The total energy deposited on exploding was 38.57%~65.90% of the total electrically stored energy, and increased with the charging voltage and powder masses exploding increasing. Meanwhile, the electrical energy applied to the powder was estimated to be about 1.5~2 times the energy theoretically required to vaporization of the powder and metallic exploding. And the energy input in exploding supplied by circuit increased with the charging voltage and the metallic powder conductor height increasing.

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Periodical:

Applied Mechanics and Materials (Volumes 37-38)

Pages:

1429-1432

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.37-38.1429

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Online since:

November 2010

Authors:

Gang Yi Zhou, Xin Long Dong, Jun Liu

Keywords:

Current Density, Deposited Energy, Electrothermal Explosion, Metallic Powder

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