6533b85cfe1ef96bd12bd411
RESEARCH PRODUCT
Influence of the tip effect of a carbon nanostructure on low current electrical arc initiation
Jérôme RossignolBrice De FonsecaEric BourillotPhilippe Testésubject
Materials scienceNanotechnology02 engineering and technologyElectron01 natural scienceslaw.inventionElectric arcVacuum switchlaw0103 physical sciencesCathodic arc depositionGeneral Materials ScienceComputingMilieux_MISCELLANEOUSContactor010302 applied physicsbusiness.industryMechanical EngineeringVacuum arc021001 nanoscience & nanotechnologyCondensed Matter PhysicsCathode13. Climate actionMechanics of MaterialsElectrodeOptoelectronics0210 nano-technologybusinessdescription
During their setting off, circuit breakers and vacuum switch devices are accompanied by an electric arc whose physical and chemical properties are governed by emissive current sites at the cathode surface called cathode spots. Assuming the continuity of the current on the cathode surfaces, the cathode spots contribute to supply the electrical arc by electron emission and material ejection. Thus they cause erosion on the contact electrodes inducing a dysfunction of contactors. The apparition of these cathode spots is due essentially to dust particles and surface irregularities at different scales. This experimental work represents a contribution to the understanding of the electrical arc behaviour by an investigation at submicronic scale on the influences of nanostructured carbon tips on the electric arc initiation and the cathode spots birth.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-12-01 |