Observation of gliding arc surface treatment

Yukihiro Kusano, Jiajian Zhu, A. Ehn, Z.S. Li, M. Aldén, Mirko Salewski, Frank Leipold, A. Bardenshtein, N. Krebs

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

An alternating current (AC) gliding arc can be conveniently operated at atmospheric pressure and efficiently elongated into the ambient air by an air flow and thus is useful for surface modification. A high speed camera was used to capture dynamics of the AC gliding arc in the presence of polymer surfaces. A gap was observed between the polymer surface and the luminous region of the plasma column, indicating the existence of a gas boundary layer. The thickness of the gas boundary layer is smaller at higher gas flow-rates or with ultrasonic irradiation to the AC gliding arc and the polymer surface. Water contact angle measurements indicate that the treatment uniformity improves significantly when the AC gliding arc is tilted to the polymer surface. Thickness reduction of the gas boundary layer, explaining the improvement of surface treatment, by the ultrasonic irradiation was directly observed for the first time.
Original languageEnglish
JournalSurface Engineering
Volume31
Issue number4
Pages (from-to)282-288
ISSN0267-0844
DOIs
Publication statusPublished - 2015

Keywords

  • Plasma treatment
  • Gliding arc
  • Gas boundary layer
  • Polyester
  • Ultrasound
  • Planar laser induced fluorescence

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