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Type: Artigo de periódico
Author: MAROTTA, A
Abstract: In the present paper we report on a highly efficient operation of the zirconium cathode in a vortex-stabilized air plasma torch. Our measurements show low erosion rates of the zirconium cathode for two methods of holding the zirconium inserts. Reproducible operation of the plasma torch, together with many turn-on-and-off cycles of the arc, is obtained, for 94 A. We show that the erosion rate is reduced by more than one order of magnitude as the erosion depth grows. We present a possible explanation for this effect. After 50 h of operation of the torch, the erosion depth measured was 3 mm. A formula was obtained that enables one to calculate the specific erosion from the erosion rate. Experimental results of the cathode dissipated power and its connection to cathode erosion are also discussed.
Country: Inglaterra
Editor: Iop Publishing Ltd
Rights: fechado
Identifier DOI: 10.1088/0022-3727/27/1/008
Date Issue: 1994
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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