Abstract
It is important for understanding the processes in the electrodischarge chambers of the pulsed plasma generators are the basic mechanisms and quantitative characteristics of the electrothermal erosion of the electrodes. The fact is that the metal, which evaporated from the electrodes, affects both the characteristics of the arc (electric field intensity, emission characteristics, dynamic characteristics, etc.), and the heat transfer processes in the discharge chamber, changing the physical characteristics of the gas (heat capacity, thermal conductivity, density, and viscosity). In addition, the erosion of the electrodes is accompanied by the powerful electrode jets, which also impact the processes of heat transfer in the discharge chamber and the arc characteristics. In some cases, there was erosion in the form of the ejection of the surface layer of the electrode’s metal. Besides, the change of physical characteristics, in particular an apparent molecular weight of the mixture gas + metal and associated directly with it the sound of speed, impact significantly the efficiency of heat transfer from the arc to the gas.
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Kolikov, V., Bogomaz, A., Budin, A. (2018). Erosion of Electrodes. In: Powerful Pulsed Plasma Generators. Springer Series on Atomic, Optical, and Plasma Physics, vol 101. Springer, Cham. https://doi.org/10.1007/978-3-319-95249-9_5
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