Thermochemical cathodes in arc plasmatorches
a:2:{s:4:"TYPE";s:4:"TEXT";s:4:"TEXT";s:57:"A.S. An’shakov, E.K. Urbakh, A.E. Urbakh, and V.A. Faleev";}
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
Pages: 643-648
Abstract
Results of experiments with thermochemical cathodes made on the basis of hafnium and zirconium are presented. Data on heat fluxes to an electrode and its erosion depending on the arc current allowed an estimate of the service life of hafnium cathode in oxygen-bearing media. The scheme of cathode with four thermoemission insertions was suggested and implemented for a significant prolongation of cathode operation in comparison with a single-insertion cathode.
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