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ISSN: 1093-3611 Print
ISSN: 1940-4360 Online
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DOI: 10.1615/HighTempMatProc.v12.i1-2
Pages: 167
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DOI: 10.1615/HighTempMatProc.v12.i1-2.50
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Article price - $35.00 |
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EXPERIMENTAL OBSERVATION OF THE INTERACTION BETWEEN A MICROSCOPIC CATHODE TIP AND ELECTRICAL ARC
J. Rossignol
Institut Carnot de Bourgogne, Bâtiment Mirande − Chimie 9, avenue Alain Savary, BP 47870, 21078 Dijon Cedex − France
Ph. Teste
Laboratoire de Génie Electrique de Paris, Plateau de Moulon 11 rue Joliot Curie, SUPELEC, CNRS, France, 91192 Gif sur Yvette
E. Bourillot
Institut Carnot de Bourgogne, UMR 5209, Université de Bourgogne Mirande B.P. 47870 21078 Dijon Cedex - France
B. de Fonseca
Institut Carnot de Bourgogne, UMR 5209, Université de Bourgogne Mirande B.P. 47870 21078 Dijon Cedex - France,
ABSTRACT
Many theories and hypotheses consider that the properties of the electrical arc are the consequence of the processes near the cathode (cathode zone). This zone represents the interaction of the electrical arc with the cathode surface. At the surface, the continuity of the current is managed by the current emissive site (cathodic spot).
On macroscopic and mesoscopic scales, theories and experimental observations deal with the erosion of the cathodic surface. Under micrometer range, there are only theories describing the erosion of the surface by the arc root. At this scale the work presented here propose an original method to evaluate the arc-cathode interaction. By using the nanotechnology's method of deposition, the roughness of the electrode surface is controlled and the location of the unique microscopic dip is designed. After discharge, the influence of the cathodic tip in the cathodic erosion process is estimated.
pages 55-64
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