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- 플라즈마 아크 방전법으로 제조된 Fe 나노분말의 미세조직에 미치는 챔버압력 영향
- Effect of Chamber Pressure on the Microstructure of Fe Nano Powders Synthesized by Plasma Arc Discharge Process
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Journal of Korean Powder Metallurgy Institute 2004;11(4):328-332
DOI: https://doi.org/10.4150/KPMI.2004.11.4.328
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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_3O_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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