Investigation of erosion mechanism of tungsten-based cathode in Ar-N2 DC arc

Naoki Sakura, Masaki Yoshida, Manabu Tanaka, Takayuki Watanabe

研究成果: Contribution to journalArticle

抜粋

Direct current arc has been used in a wide industrial field. Reducing in cathode erosion is an important issue for process cost reduction, however the erosion mechanism under molecular gas as plasma supporting gas has not been clarified yet. The purpose of this research is to elucidate the erosion mechanism of tungsten based cathodes in atmospheric pressure Ar-N2 DC arc. The metal vapor generated from the cathode surface was successfully visualized by a high speed camera system with a pair of band pass filters. Combing the visualization with the cahtode temperature measurements provides the tungsten vapor evaporation mechanism; tungsten vapor was generated not from the high temperature part of the cathode tip but from the peripheral part. The arc temperature measurement confirmed that ionization of tungsten atoms in the high-temperature region of the arc caused to this characteristic distribution of tungsten vapor. These findings advance the understanding of such electrode phenomena leading to increased use time of the electrode, and as a result the industrial use of N2 arcs is expected to expand.

元の言語英語
記事番号404002
ジャーナルJournal of Physics D: Applied Physics
52
発行部数40
DOI
出版物ステータス出版済み - 7 26 2019

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

フィンガープリント Investigation of erosion mechanism of tungsten-based cathode in Ar-N<sub>2</sub> DC arc' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用