Diagnostics of cathode material loss in cutting plasma torch

0429753 - ÚT 2015 RIV GB eng J - Článek v odborném periodiku
Gruber, Jan - Šonský, Jiří - Hlína, Jan
Diagnostics of cathode material loss in cutting plasma torch.
Journal of Physics D-Applied Physics. Roč. 47, č. 29 (2014). ISSN 0022-3727. E-ISSN 1361-6463
Institucionální podpora: RVO:61388998
Klíčová slova: plasma torch * plasma cutting * cathode wear
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
Impakt faktor: 2.721, rok: 2014
http://iopscience.iop.org/0022-3727/47/29/295201/

A cutting plasma torch was observed in several ways by a high-speed camera with a focus on the cathode area. In the first experiment, the plasma arc between the nozzle tip and anode was recorded in a series of duty cycles ranging from new unworn cathodes to cathode failure due to wear and material loss. In the second experiment, we used a specially modified nozzle to observe the inside area between the cathode and the nozzle exit through a fused silica window. Finally, using tilted view, we observed a pool of molten hafnium at the cathode tip during the plasma torch operation. The process of cathode material melting, droplet formation, their expulsion and rate of cathode material loss was examined.
Trvalý link: http://hdl.handle.net/11104/0234919