抄録
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 |
| 巻 | 52 |
| 発行部数 | 40 |
| DOI | |
| 出版物ステータス | 出版済み - 7 26 2019 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Acoustics and Ultrasonics
- Surfaces, Coatings and Films
これを引用
Investigation of erosion mechanism of tungsten-based cathode in Ar-N2 DC arc. / Sakura, Naoki; Yoshida, Masaki; Tanaka, Manabu; Watanabe, Takayuki.
：: Journal of Physics D: Applied Physics, 巻 52, 番号 40, 404002, 26.07.2019.研究成果: ジャーナルへの寄稿 › 記事
}
TY - JOUR
T1 - Investigation of erosion mechanism of tungsten-based cathode in Ar-N2 DC arc
AU - Sakura, Naoki
AU - Yoshida, Masaki
AU - Tanaka, Manabu
AU - Watanabe, Takayuki
PY - 2019/7/26
Y1 - 2019/7/26
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85071309936&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85071309936&partnerID=8YFLogxK
U2 - 10.1088/1361-6463/ab3139
DO - 10.1088/1361-6463/ab3139
M3 - Article
AN - SCOPUS:85071309936
VL - 52
JO - Journal Physics D: Applied Physics
JF - Journal Physics D: Applied Physics
SN - 0022-3727
IS - 40
M1 - 404002
ER -