Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Fabrication of Core-Shell Structured Ni-Based Alloy Nanopowder by Electrical Wire Explosion Method

  • Lee, A-Young (Advanced Functional Materials R&D Group, Korea Institute of Industrial Technology) ;
  • Lee, Gwang-Yeob (Advanced Analysis Center, Korea Institute of Science and Technology) ;
  • Oh, Hye-Ryeong (Advanced Functional Materials R&D Group, Korea Institute of Industrial Technology) ;
  • Kim, Hyeon-Ah (Advanced Functional Materials R&D Group, Korea Institute of Industrial Technology) ;
  • Kim, Song-Yi (Advanced Functional Materials R&D Group, Korea Institute of Industrial Technology) ;
  • Lee, Min-Ha (Advanced Functional Materials R&D Group, Korea Institute of Industrial Technology)
  • Received : 2016.11.07
  • Accepted : 2016.11.23
  • Published : 2016.12.28
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Abstract

Electrical wire explosion in liquid media is a promising method for producing metallic nanopowders. It is possible to obtain high-purity metallic nanoparticles and uniform-sized nanopowder with excellent dispersion stability using this electrical wire explosion method. In this study, Ni-Fe alloy nanopowders with core-shell structures are fabricated via the electrical explosion of Ni-Fe alloy wires 0.1 mm in diameter and 20 mm in length in de-ionized water. The size and shape of the powders are investigated by field-emission scanning electron microscopy, transmission electron microscopy, and laser particle size analysis. Phase analysis and grain size determination are conducted by X-ray diffraction. The result indicate that a core-shell structured Ni-Fe nanopowder is synthesized with an average particle size of approximately 28 nm, and nanosized Ni core particles are encapsulated by an Fe nanolayer.

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