Abstract
This work deals with investigations of model plasma source realised as electric arc discharge in gas atmosphere between Cu-Cr composite electrodes. Radial distributions of temperature and electron density in arc plasma column were studied by optical emission spectroscopy. The content of electrode metals' vapours in discharge was calculated on the base of experimentally obtained plasma parameters as initial data. So, in this way the erosion properties of such composition can be determined.
Highlights
Composite materials on copper base with addition of refractory metals, chromium, have advanced applications in electric power industry. Such composition are mostly used as contact material in vacuum arc-quenching chambers of high and middle loads systems [1, 2]
The aim of this paper is investigation of plasma parameters of model source realised as electric arc discharge in air atmosphere between Cu–Cr composite electrodes
The arc was ignited between the end surfaces of vertically-oriented non-cooled copper-chromium electrodes
Summary
Composite materials on copper base with addition of refractory metals, chromium, have advanced applications in electric power industry. Such composition are mostly used as contact material in vacuum arc-quenching chambers of high and middle loads systems [1, 2]. The erosion properties of abovementioned material play key role, which determined the efficiency of circuits’ commutation performance. It is well-known that heterogeneous compound materials of two or more components with different melting and boiling points, such as Cu–Cr, are mostly manufactured by sintering and/or infiltration techniques. High breaking capacity, gettering effect, smooth surface after arcing with subsequent high electrical strength, moderate chopping current of such composition are just those properties which are required in this kind apparats [1]
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