Electrical Treeing and Partial Discharge Characteristics of Epoxy/Silica Nanocomposite under Alternating Current

Figure 8

Surface erosion morphology by PD for epoxy nanocomposites with different alkyl-modified nanosilica contents: (a) 0 phr, (b) 1 phr, (c) 3 phr, and (d) 5 phr.

(a)

(b)

(c)

(d)