Title :
Meso and nano morphological changes of an epoxy surface exposed to low-intensity discharges in air [insulating material applications]
Author :
Fréchette, M.F. ; Larocque, R.Y. ; Veillette, R. ; Trudeau, M.L.
Author_Institution :
Inst. de Recherche d´´Hydro-Quebec, Varennes, Que., Canada
Abstract :
A discharge situation, involving an epoxy surface, was produced to investigate degradation associated with discharge interactions. It was realized that when the discharge was energetic enough, the epoxy matrix was vaporized, leaving the load to collapse, thus increasing the density of SiO2. Several microscopy techniques were employed to document and unravelled some nanoscopic aspects related to the present case. It was observed that large SiO2 particles in the micrometric range, embedded close to the bulk surface, showed a greater resistance to partial discharges.
Keywords :
discharges (electric); epoxy insulation; filled polymers; particle size; silicon compounds; surface morphology; vaporisation; SiO2; air/epoxy surface; bulk surface embedded particles; discharge induced surface degradation; discharge interactions; epoxy matrix vaporization; insulating materials; low-intensity discharge exposed epoxy surface; mesomorphological changes; nanomorphological changes; partial discharge resistance; particle size; Corona; Degradation; Electrodes; Insulation; Microscopy; Solids; Surface discharges; Surface morphology; Surface resistance; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2004. CEIDP '04. 2004 Annual Report Conference on
Print_ISBN :
0-7803-8584-5
DOI :
10.1109/CEIDP.2004.1364270
