Corona resistance of epoxy nanocomposites: Experimental results and modeling

G. Iyer, R. S. Gorur, A. Krivda

Research output: Contribution to journalArticlepeer-review

51 Scopus citations


Epoxy composites with micro, nano and micro + nano silica fillers have been evaluated for their resistance to corona using point plane electrodes. The experiments were conducted for 500 h and the surface erosion was measured after every 100 h using a surface profilometer. The results show significant improvement in corona resistance of micro+nanofilled samples and nanofilled samples when compared with the microfilled samples and unfilled materials respectively. The results emphasize the importance of good filler dispersion. A model to map the degradation path in the filled and unfilled samples was developed using Dijkstra's shortest path algorithm. Reasonable agreement between the length of degradation path and the corona resistance in samples containing both micro + nanofillers has been demonstrated.

Original languageEnglish (US)
Article number6148509
Pages (from-to)118-125
Number of pages8
JournalIEEE Transactions on Dielectrics and Electrical Insulation
Issue number1
StatePublished - Feb 2012


  • Corona resistance
  • Epoxy nanocomposites
  • Erosion depth
  • Microcomposites
  • Nanodielectrics
  • Nanofillers

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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