COMPOSITE Cu-Cr MATERIALS UNDER THERMAL ACTION OF ELECTRIC ARC DISCHARGE PLASMA

Murmantsev, A.; Veklich, A.; Boretskij, V.; Bartlova, Milada; Dostál, Lukáš; Píška, J.; Šimek, David; Tolochyn, A.

doi:10.46813/2021-131-098

Cited by 2 publications

(1 citation statement)

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“…Traditionally, the erosion intensity of electrode materials caused by the thermal effect of electric arc discharge plasma is indirectly determined by calculating the content of metal vapours in the positive plasma column based on its equilibrium composition [9,10]. This method requires experimental determination of plasma parameters such as temperature and electron density.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Spatial Distribution of Metal Vapours Admixtures in the Plasma of an Electric Arc Discharge

Murmantsev

2023

Problems of Atomic Science and Technology

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This work focuses on diagnosing the plasma in an electric arc discharge in an argon flow using optical emission spectroscopy. The method employed for determining the population of energy levels and the concentration of metal atoms based on the absolute values of emission intensity is described and validated. The experimental setup includes a spectrograph and an RGB CMOS matrix as the emission registration device. By obtaining the absolute values of the spectral radiances of Cu I lines and considering the axial symmetry of the electric arc discharge, the local radiation intensity of these lines is determined. Radial distributions of copper atom concentrations are then calculated using the absolute values of emission intensities and the radial distribution of the excitation temperature, which is determined using the Boltzmann plots technique. Two methods are employed for calculating the atom concentrations. The first method involves Boltzmann plots based on four spectral lines of Cu I and the corresponding excitation temperature. The second method determines the concentrations directly from the population of copper's energy levels, which are derived from the absolute values of emission intensity of the Cu I spectral lines. The results obtained from these two methods exhibit a coincidence of within 20%, supporting the recommendation of this technique for plasma diagnostics in electric arc discharges.

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Section: Introductionmentioning

confidence: 99%

Investigation of Spatial Distribution of Metal Vapours Admixtures in the Plasma of an Electric Arc Discharge

Murmantsev

2023

Problems of Atomic Science and Technology

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Peculiarities of optical emission spectroscopy of Copper–Chromium‐air plasma

et al. 2021

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This work is devoted to the peculiarities of optical emission spectroscopy of plasma of electric arc discharge between Cu and Cr composite electrodes manufactured of two different compositions (Cr50% and Cr35% of volume) by impact sintering or pressing sintering technologies at various temperatures, namely: 650, 750, 850, 950, 1,050, and 1,150 • C. The investigations are carried out at an arc current of 3.5 A. The comparison of radial distributions of plasma temperatures, which were determined by the Boltzmann plot technique both on the basis of Cu I and Cr I spectral lines, are performed and discussed.

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COMPOSITE Cu-Cr MATERIALS UNDER THERMAL ACTION OF ELECTRIC ARC DISCHARGE PLASMA

Cited by 2 publications

References 10 publications

Investigation of Spatial Distribution of Metal Vapours Admixtures in the Plasma of an Electric Arc Discharge

Investigation of Spatial Distribution of Metal Vapours Admixtures in the Plasma of an Electric Arc Discharge

Peculiarities of optical emission spectroscopy of Copper–Chromium‐air plasma

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