Improvement of in-flight alumina spheroidization process using a small power argon DC-RF hybrid plasma flow system by helium mixture

Hidemasa Takana, Juyong Jang, Junji Igawa, Tomoki Nakajima, Oleg P. Solonenko, Hideya Nishiyama

研究成果: Review article査読

13 被引用数 (Scopus)

抄録

For the further improvement of in-flight alumina spheroidization process with a low-power direct-current radiofrequency (DC-RF) hybrid plasma flow system, the effect of a small amount of helium gas mixture in argon main gas and also the effect of increasing DC nozzle diameter on powder spheroidization ratio have been experimentally clarified with correlating helium gas mixture percentage, plasma enthalpy, powder in-flight velocity, and temperature. The alumina spheroidization ratio increases by helium gas mixture as a result of enhancement of plasma enthalpy. The highest spheroidization ratio is obtained by 4% mixture of helium in central gas with enlarging nozzle diameter from 3 to 4 mm, even under the constant low input electric power given to a DC-RF hybrid plasma flow system.

本文言語English
ページ(範囲)432-439
ページ数8
ジャーナルJournal of Thermal Spray Technology
20
3
DOI
出版ステータスPublished - 2011 3

ASJC Scopus subject areas

  • 凝縮系物理学
  • 表面、皮膜および薄膜
  • 材料化学

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