Author_Institution :
Lab. of Beam Technol., Nagaoka Univ. of Technol., Niigata, Japan
Abstract :
The pulsed wire discharge, as one of the well-developed pulsed power technologies, has been successfully applied to nanosize powder production. In the demonstration experiments, the discharge was carried out with the peak current of ~10 kA, the pulse length of ~20 μs, and the pulse energy of ~80 J. Nanosize powders of metals (Al, Fe, Cu, Mo, and Pb), metal oxides (Al2O3, TiO2, Fe 2O3, NiO, ZrO2, SnO2, and PbO), and metal nitrides (TiN, ZrN, Ta2N) have been synthesized by pulsed discharge of metal wires in argon, oxygen, or nitrogen. The typical powder production rate was ~5 mg/pulse. The results of surface-area measurement have given the average powder sizes in the range of 20~70 nm, depending on the material of the powder
Keywords :
discharges (electric); nanotechnology; particle size; powder metallurgy; powder technology; pulsed power technology; 10 kA; 20 mus; 80 kJ; Al; Al2O3; Cu; Fe; Fe2O3; Mo; NiO; Pb; PbO; SnO2; Ta2N; TiN; TiO2; ZrN; ZrO2; metal wires; nanosize powder production; nanosize powder synthesis; nanotechnology; peak current; plasma materials processing applications; powder production rate; powder size; pulse length; pulsed discharge; pulsed power technologies; pulsed wire discharge; surface area measurement; Chemical processes; Ion beams; Iron; Laser beams; Optical pulses; Plasma measurements; Powders; Production; Surface discharges; Wire;
