Homogeneity in a Metal Wire under Melting

Ткаченко, С. И.; Khishchenko, K. V.; Levashov, P. R.

doi:10.1007/s10765-005-6709-5

Cited by 10 publications

(5 citation statements)

References 12 publications

(14 reference statements)

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“…In such a case, vaporization of the liquid will progress from the liquid/gas interface to the center of the liquid cylinder, creating a vaporization wave. This process is similar to the one described in [21] for the liquefaction of a solid metallic wire. So, the energy received by the gas due to Joule heating also provides the energy for vaporization of the inner liquid core by means of this vaporization wave.…”

Section: Resistivity Limit Valuessupporting

confidence: 58%

Neutral Copper Gas Resistivity Measurements by Means of an Exploding Wire in Air

Bilbao

Prieto

2017

Applied Sciences

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Abstract:In this work, we present experimentally obtained limits for the values of the neutral copper gas electrical resistivity as a function of the temperature. When a current of about ≈ 10 3 A or larger flows through a metallic wire in a microsecond or shorter time, the wire performs a phase change from solid to plasma, through intermediate states of metallic liquid and vapor. If the wire is surrounded by a non-conductive dense medium that inhibits the circulation of current outside the wire (e.g., air at room temperature and standard pressure, as in our experiments), the electric current stops when part of the metallic wire becomes gas. This process is known as dark pause, and it has a duration that depends on the experiment parameters. By means of a suitable choice of parameters, we achieved a duration of the dark pause of ≈1 µs, which allowed us to determine the limits of the electrical resistivity of the metallic gas. The range of measured values starts from the resistivity of liquid copper at boiling temperature, and goes up to ≈0.01 (±20%) Ohm·m at the maximum measured temperature.

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Section: Resistivity Limit Valuessupporting

confidence: 58%

Neutral Copper Gas Resistivity Measurements by Means of an Exploding Wire in Air

Bilbao

Prieto

2017

Applied Sciences

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“…Recent high-resolution x-ray radiography also supported the 1D calculation results [101]. Nevertheless, one should be aware that the 0D simplification of the EP is valid provided for the uniform heating along the wire radius, and additional caution should be taken for very high current densities as significant inhomogeneity will occur during melting [78,102].…”

Section: Numerical Modellingmentioning

confidence: 75%

Electrical wire explosion as a source of underwater shock waves

Shi¹,

Yin²,

Li³

et al. 2021

J. Phys. D: Appl. Phys.

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The underwater electrical wire explosion (UEWE) is an appealing source of underwater shock waves (SWs) with a high conversion efficiency from electrical energy to mechanical energy, good repeatability and controllability. Industrial applications are already seen in oil-well unblocking and stratum stimulation, and research is currently underway to apply UEWEs in electro-hydraulic forming, exploitation of unconventional gas and oil resources, etc. The emerging new applications call for a review on UEWE research from the perspective of an efficient SW source. This review paper considers the physical processes and numerical simulation methods, electrical and SW characteristics, and current and potential applications, and provides suggestions for future research directions. The code (XJ_UEWE01) developed by the authors to solve a coupling model of UEWE is included. The paper will provide students and researchers new to this field with an explanation of basic concepts of UEWE and a detailed overview of previous studies, and will aid research on UEWE applications, especially device development and parameter optimization.

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“…using the experimental dependencies I(t) and U (t) [3] except for the stage of heating up to T = 10 kK. In case of EOS1 at low temperatures we used the semiempirical formulas [9][10][11] for the electrical conductivity σ = σ(ρ, T ) taking into account melting effect instead of experimental functions because of noise on the measured time dependence of voltage at the initial stage. The thermal conductivity in case of EOS1 was calculated according to the Wiedemann-Franz law, κ = k W F T σ, where k W F is the Wiedemann-Franz constant.…”

Section: Modelingmentioning

confidence: 99%

The influence of an equation of state on the interpretation of electrical conductivity measurements in strongly coupled tungsten plasma

Ткаченко

Levashov

Khishchenko

2006

J. Phys. A: Math. Gen.

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We study the influence of equation-of-state (EOS) model on the interpretation of electrical conductivity measurements in strongly coupled plasma of tungsten by Korobenko et al. (2002 Plasma Physics Reports 28(12) 1008-1016). Three different semiempirical EOS models for tungsten are used. Discrepancies in obtained thermodynamic parameters and specific resistivity values as compared with calculation results of Korobenko et al. are analysed.

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Homogeneity in a Metal Wire under Melting

Cited by 10 publications

References 12 publications

Neutral Copper Gas Resistivity Measurements by Means of an Exploding Wire in Air

Neutral Copper Gas Resistivity Measurements by Means of an Exploding Wire in Air

Electrical wire explosion as a source of underwater shock waves

The influence of an equation of state on the interpretation of electrical conductivity measurements in strongly coupled tungsten plasma

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