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UDC 533.924

MODIFICATION OF ELECTRODE SURFACE BY VACUUM ARC DISCHARGE

V. A. Stepanov, Dr. in physics and mathematics, full professor, RSU named for S. Yesenin, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.
A. I. Kudyukin, post-graduate student, RSU named for S. Yesenin, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.
E. N. Moos, Dr. in technical sciences, full professor, RSU named for S. Yesenin, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.
N. B. Rybin, PhD (in technical sciences), Ryazan state radio engineering university; This email address is being protected from spambots. You need JavaScript enabled to view it.
A. T. Rott, director, LLC «Vacuum technologies»; This email address is being protected from spambots. You need JavaScript enabled to view it.
K. E. Seregin, post-graduate student, RSU named for S. Yesenin; This email address is being protected from spambots. You need JavaScript enabled to view it.

In recent years the tendency to use electrodes from different alloys in vacuum arc-extinguishing camera with the purpose to find the best option of longevity and quality has been observed. It is connected to the fact that requirements to contact materials are too contradictory and it isn't possible to find a uniform metal suitable for vacuum arc-extinguishing chamber contacts. We decided to clarify what happens to composition and structure of electrodes in case of their operation. The aim of the work is the analysis of essential spatial redistribution at melt moment in a concentration profile of copper atoms from the center of plasma arc influence to peripheral zones with lower temperature. Change in surface relief help to explain the redistribution of sample element composition under the influence of vacuum arc discharge.

Key words: vacuum arc, arc-extinguishing camera, issue, multicomposition alloys, atomic and force microscopy, surface relief, cathode spots.

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