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High Temperature Material Processes (An International Quarterly of High-Technology Plasma Processes)

An International Journal

ISSN for PRINT: 1093-3611

Institutional price:	$604.00
Issues per year:	4

Best Paper Award Selection - Editorial Board Site

2007, Volume11

162 pages

DOI: 10.1615/HighTempMatProc.v11.i1

Issue price - $168.00

EROSION OF THE TUNGSTEN CATHODE IN A COMMERCIAL PLASMATRON

E. I. Asinovsky
Science and Engineering Center for Energy-Efficient Processes and Equipment of Joint Institute for High Temperatures of Russian Academy of Sciences Izhorskaya 13/19, Moscow, 127412, Russia

G. A. Zhelobtsova
Science and Engineering Center for Energy-Efficient Processes and Equipment of Joint Institute for High Temperatures of Russian Academy of Sciences Izhorskaya 13/19, Moscow, 127412, Russia

P.P. Ivanov
Science and Engineering Center for Energy-Efficient Processes and Equipment of Joint Institute for High Temperatures of Russian Academy of Sciences Izhorskaya 13/19, Moscow, 127412, Russia

E. Kh. Isakaev
Science and Engineering Center for Energy-Efficient Processes and Equipment of Joint, Institute for High Temperatures of Russian Academy of Sciences Izhorskaya 13/19, Moscow, 127412, Russia

A. L. Ochkan'
Science and Engineering Center for Energy-Efficient Processes and Equipment of Joint Institute for High Temperatures of Russian Academy of Sciences Izhorskaya 13/19, Moscow, 127412, Russia

I. S. Samoylov
Science and Engineering Center for Energy-Efficient Processes and Equipment of Joint Institute for High Temperatures of Russian Academy of Sciences Izhorskaya 13/19, Moscow, 127412, Russia

ABSTRACT

Time history of the erosion of the sintered and fused tungsten on the cathode of plasmatron is studied under the current 350 A with nitrogen serving as plasma forming gas. Zones having different erosion mechanisms are localized at the surface of the cathode. Those mechanisms are the metal vaporization from the central area and the entrainment of big fragments from the peripheral area. Keywords: plasmatron, tungsten, cathode, erosion.