NANOPOWDERS PRODUCED BY ELECTRICAL EXPLOSION OF WIRES
Multi-scale and/or multi-disciplinary approach to process-product innovation
Nanotechnology & Nanomanufacturing (T3-1)
Keywords: nanopowder, electric explosion of wires
Nanosized powders, due to their specific properties, are more and more widely used as basic materials for the production of ceramics and composites, filters, lubricant additives, etc.
One of the ways of nanopowder production is electric explosion of wires (EEW). It is the process of explosive destruction of a metal wire under the action of great density current. This process accompanied by scattering products, shock waves and electromagnetic radiation. Material of the wire transmutes into particles of nanosized range (10–100 nm) in accordance with certain conditions.
EEW in inert gases or hydrogen is used to produce powders of metals, alloys, and intermetallic compounds. EEW in chemically active gases is used to produce nanopowders of chemical compounds of metals: oxides, nitrides, carbides, etc.
Phase and elemental compositions of nanopowders prepared by electrical explosion of tungsten, titanium, aluminum wires in water and hydrocarbons were investigated. The density of reactants is much higher during wire explosions in condensed media compared to explosions in gases that allows the chemical compounds output to be increased and their phase composition to be changed. The influence of electric parameters on the phase and elemental composition of EEW products was studied. The problems of nanopowder agglomeration and obtaining nanopowders with narrow particle size distributions are discussed.
See the full pdf manuscript of the abstract.
Presented Monday 17, 15:00 to 15:20, in session Nanotechnology & Nanomanufacturing (T3-1).
