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

fYear

2004

fDate

17-20 Oct. 2004

Firstpage

393

Lastpage

397

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 2004. CEIDP '04. 2004 Annual Report Conference on

Print_ISBN

0-7803-8584-5

Type

conf

DOI

10.1109/CEIDP.2004.1364270

Filename

1364270