Investigation of erosion mechanism of tungsten-based electrode in multiphase AC arc by high-speed visualization of electrode phenomena

Manabu Tanaka, Taro Hashizume, Tomoyuki Imatsuji, Yushi Nawata, Takayuki Watanabe

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Electrode phenomena in a multiphase AC arc were successfully visualized using a high-speed observation system with a bandpass filter system to understand the erosion mechanisms of tungsten-based electrodes due to the droplet ejection and electrode evaporation. The obtained results indicated that both droplet ejection and electrode evaporation contributed to the electrode erosion in the multiphase AC arc. The erosion by droplet ejection mainly occurred during the cathodic period, while electrode evaporation mainly occurred during the anodic period. The rates of erosion by droplet ejection and evaporation were estimated to be 6 and 3 g/min, respectively, when the arc current was 100 A. The results of an evaluation of the possible forces acting on the electrode tip suggested that the electromagnetic force was the dominant force in the cathodic period, resulting in droplet ejection.

Original languageEnglish
Article number07LC01
JournalJapanese Journal of Applied Physics
Volume55
Issue number7S2
DOIs
Publication statusPublished - Jan 1 2016

Fingerprint

erosion
Tungsten
Erosion
alternating current
tungsten
Visualization
arcs
high speed
ejection
Electrodes
electrodes
Evaporation
evaporation
Bandpass filters
bandpass filters
electromagnetism
evaluation

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Investigation of erosion mechanism of tungsten-based electrode in multiphase AC arc by high-speed visualization of electrode phenomena. / Tanaka, Manabu; Hashizume, Taro; Imatsuji, Tomoyuki; Nawata, Yushi; Watanabe, Takayuki.

In: Japanese Journal of Applied Physics, Vol. 55, No. 7S2, 07LC01, 01.01.2016.

Research output: Contribution to journalArticle

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