Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Effect of Chamber Pressure on the Microstructure of Fe Nano Powders Synthesized by Plasma Arc Discharge Process

플라즈마 아크 방전법으로 제조된 Fe 나노분말의 미세조직에 미치는 챔버압력 영향

  • 박우영 (경남대학교 재료공학과, 한국기계연구원 재료기술연구부) ;
  • 윤철수 (한국기계연구원 재료기술연구) ;
  • 김성덕 (한국기계연구원 재료기술연구) ;
  • 유지훈 (한국기계연구원 재료기술연구) ;
  • 오영우 (경남대학교 재료공학) ;
  • 최철진 (한국기계연구원 재료기술연구부)
  • Published : 2004.08.01
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Abstract

Fe nanopowders were successfully synthesized by plasma arc discharge (PAD) process using Fe rod. The influence of chamber pressure on the microstructure was investigated by means of X-ray Diffraction (XRD), Field Emission Scanning Electron Microscope (FE-SEM), Transmission Electron Microscopy (TEM) and X-ray Photoelectron Spectroscopy (XPS). The prepared particles had nearly spherical shapes and consisted of metallic cores (a-Fe) and oxide shells (Fe$_{3}$O$_{4}$), The powder size increased with increasing chamber pressure due to the higher dissolution and ejection rate of H$_2$ and gas density in the molten metal.

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References

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