Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Phase Transformation by the Oxidation of Air-passivated W and Mo Nanopowders Produced by an Electrical Explosion of Wires

  • Kwon, Young-Soon (Research Centre for Machine Parts and Materials Processing, School of Materials and Metallurgical Engineering, University of Ulsan) ;
  • Kim, Ji-Soon (Research Centre for Machine Parts and Materials Processing, School of Materials and Metallurgical Engineering, University of Ulsa) ;
  • A. Gromov, Alexander (Chemical Technology Department, Tomsk Polytechnic University) ;
  • Hong, Moon-Hee (Materials Science Division, Agency for Defence Development)
  • Published : 2004.04.01
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Abstract

The passivation and oxidation process of tungsten and molybdenum narlopowders, produced by electrical explosion of wires was studied by means of FE-SEM, XPS. XRD, TEM, DIA-TGA and sire distribution analysis. In addition, the phase transformation of W and Mo nanopowders under oxidation in air was investigated. A chemical process is suggested for the oxidation of W and Mo nano-particles after a comprehensive testing of passivated and oxidized powders.

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