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- Phase Transformation by the Oxidation of Air-passivated W and Mo Nanopowders Produced by an Electrical Explosion of Wires
- Young-Soon Kwon, Ji-Soon Kim, Alexander A. Gromov, Moon-Hee Hong
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Journal of Korean Powder Metallurgy Institute 2004;11(2):130-136
DOI: https://doi.org/10.4150/KPMI.2004.11.2.130
1Research Centre for Machine Parts and Materials Processing, School of Materials and Metallurgical Engineering, University of Ulsan
2Research Centre for Machine Parts and Materials Processing, School of Materials and Metallurgical Engineering, University of Ulsa
3Chemical Technology Department, Tomsk Polytechnic University
4Materials Science Division, Agency for Defence Development
2Research Centre for Machine Parts and Materials Processing, School of Materials and Metallurgical Engineering, University of Ulsa
3Chemical Technology Department, Tomsk Polytechnic University
4Materials Science Division, Agency for Defence Development
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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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