Results 301 to 310 of about 117,127 (343)
Some of the next articles are maybe not open access.
Anode erosion during pulsed arcing
IEEE Transactions on Plasma Science, 1993An experimental study of the anode erosion rates of Cu, Zr, Ti, Mo, Ta, and W is presented under conditions similar to those used for electrodischarge coating. The arcs are conducted between a small anode and a larger cathode in air with pressures ranging from 10/sup -4/ to 10/sup 3/ torr.
N. Parkansky +3 more
openaire +1 more source
The erosion of electrical contacts by the normal arc
Proceedings of the IEE - Part B: Radio and Electronic Engineering, 1957The cathode material transfer under the action of the `normal arc' has been measured for a number of elements and alloys. In all cases auxiliary circuits were used to record the accumulative arc duration and the voltage/current characteristics of the arc, from which the total arc energy as well as the total charge passed in the arc could be accurately ...
W.B. Ittner, H.B. Ulsh
openaire +1 more source
Erosion of zirconium-based cathodes in an arc
Plasma Sources Science and Technology, 1993The specific erosion rates of cathodes from Zr and ZrB2 used in the water-stabilized plasma gun PAL 50 were measured. Very good values were obtained for ZrB2, establishing this material as one of the best prospects for such cathodes. X-ray microanalysis of the cross section proved that the emitting surface of ZrB2 contained zirconium oxide.
V Kopecky, B Kolman
openaire +1 more source
Cathodic erosion in the vacuum arc
Journal of Physics D: Applied Physics, 1973The cathodic erosion of Cu, Cr and Cd has been measured at DC currents below 2000 A, and was found to be, to a first approximation, dependent on the total charge passed through the arc only. The observed erosion rates were 76, 22 and 400 μg C−1 for Cu, Cr and Cd respectively.
openaire +1 more source
Arc erosion of aluminum and titanuim in presence of high currents
2013 Abstracts IEEE International Conference on Plasma Science (ICOPS), 2013Summary form only given. The purpose of this study is to develop scaling relations for material erosion with respect to electrical current for aluminum and titanium. Experiments were performed with a source capable of generating short pulses (approx. 100 μs) with up to 20kA currents across a small gap between sample pieces.
D. Nikic, A. C. Day
openaire +1 more source
Erosion rate in a vacuum arc and in a gas arc at threshold currents
2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV), 2016The present paper reports an experimental study of the erosion rate of pulsed arcs in vacuum under the influence of surface conditions (contaminants and clean), and ambient gases (argon, nitrogen with high purity introduced with pressures 600 Torr) with cold cathodes.
openaire +1 more source
Arc velocity and erosion for stainless steel and aluminum cathodes
Journal of Nuclear Materials, 1982Abstract The velocity of vacuum arcs in a magnetic field and the erosion at the cathode have been investigated for Al + 3% Mg and stainless steel. The arc currents were adjusted between 16.6 A and 70 A and a magnetic induction of 0.02 to 0.1 T was applied.
Fang, D. +3 more
openaire +2 more sources
Components of cathode erosion in vacuum arcs
Journal of Physics D: Applied Physics, 1976The composition of cathode mass loss was analysed for cadmium, copper and molybdenum vacuum arcs. It showed that two dominant flows are present, one consisting of ions, the other of molten droplets which have sizes in the order of microns to tens of microns.
openaire +1 more source
Effects of Rotational Motion of Break Arcs on Arc Duration and Contact Erosion
2011 IEEE 57th Holm Conference on Electrical Contacts (Holm), 2011An electrical rivet contact in which a column-shaped permanent magnet is embedded in the rivet shank beneath the contact head is mounted on a relay as the stationary contact. The moving contact is a conventional rivet without the magnet. The magnet forms radial magnetic field to rotate break arcs around the center axis of electrical contacts.
Junya Sekikawa, Takayoshi Kubono
openaire +1 more source
Investigation of hydrodynamic arc breaking mechanism in blasting erosion arc machining
CIRP Annals, 2016Abstract Blasting erosion arc machining (BEAM) greatly improves the material removal rate (MRR) by utilizing the electrical arcs instead of sparks as in EDM. However, the mechanism in BEAM is still not fully understood. By observing and diagnosing the electrical arc generated in a single pulse, the arc temperature is determined and hydrodynamic arc ...
Lin Gu +4 more
openaire +1 more source