The vacuum plasma electric furnace for industrial melting of tantalum ingots

The article demonstrates that using the vacuum because of its properties as a medium of zero conductivity has enabled to create the construction of hollow cathode plasma torch. An analysis of thermophysical processes inside the cathode channel was carried out. Conditions were determined for the generation of high enthalpy plasma in the cathode channel and the gas-dynamic output of the plasma into the discharge column in the axial direction. A model of the development of the processes of energy input into the cathode channel is considered. General patterns of the working modes are demonstrated, and criteria of similarity for hollow cathode discharges are formulated based on the Knudsen number, the Reynolds criterion and the interconnected electromagnetic parameters.

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Criteria for similarity of the processes taking place in vacuum plasma torches with hollow cathodes

Чередниченко

Cherednichenko

Domarov

2020

J. Phys.: Conf. Ser.

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Operating modes of vacuum plasmatrons with hollow cathodes

Anshakov

Чередниченко²,

Serikov

et al. 2019

IOP Conf. Ser.: Mater. Sci. Eng.

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Results of experimental studies of starting characteristics of vacuum plasma torches in glow discharge mode with switching to abnormal glow discharge and arc discharge are presented. It is demonstrated that if high-frequency current source is used parallel to direct current, ion current is increased and the time of starting mode is reduced. Experimental smelts of tantalum, tungsten, molybdenum, zirconium, and titan were carried out in operating modes with measurement of liquid metal surface temperature in relation to the supplied heating power.

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Features of the operating modes of a hot hollow cathode in a vacuum arc discharge

Чередниченко¹,

Zuev

Serikov

2019

IOP Conf. Ser.: Mater. Sci. Eng.

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The vacuum plasma electric furnace for industrial melting of tantalum ingots

Abstract: Paper presents the'results of experiment investigation on tantalum ingots receiving and capacitor . tantalum powder working.

Cited by 3 publications

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Criteria for similarity of the processes taking place in vacuum plasma torches with hollow cathodes

Criteria for similarity of the processes taking place in vacuum plasma torches with hollow cathodes

Operating modes of vacuum plasmatrons with hollow cathodes

Features of the operating modes of a hot hollow cathode in a vacuum arc discharge

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