Erosion Characteristics of Copper-Based Composite Electrodes in an Electric Arc of Variable Length with Transverse Gas Blowing


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Abstract

We present experimental data on the erosion of electrodes made of copper-based pseudoalloys during contact breaking at current amplitudes up to 150 kA in nitrogen at a pressure of ~2 MPa with transverse gas blowing. The electric-erosion characteristics of copper–iron pseudoalloy CuFe (85/15%) electrodes obtained by laser layer melting, as well as CuFe (70/30%) and CuW (25/75%) pseudoalloy electrodes fabricated by traditional powder technology (sintering of pressed powder compacts) are reported. The specific erosion of electrodes in variable-length arc amounts to ~1 mg/C, which somewhat exceeds the value observed for a fixed-length arc discharge gap.

About the authors

A. V. Budin

Institute for Electrophysics and Electric Power

Email: pinchme@mail.ru
Russian Federation, St. Petersburg, 191186

M. E. Pinchuk

Institute for Electrophysics and Electric Power; UniLabs Research and Production Corporation

Author for correspondence.
Email: pinchme@mail.ru
Russian Federation, St. Petersburg, 191186; St. Petersburg, 191180

N. K. Kurakina

Institute for Electrophysics and Electric Power; UniLabs Research and Production Corporation

Email: pinchme@mail.ru
Russian Federation, St. Petersburg, 191186; St. Petersburg, 191180

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