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Surface degradation of polyamide nanocomposites caused by partial discharges using IEC (b) electrodes

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5 Author(s)
Kozako, M. ; Adv. Res. Inst. for Sci. & Eng., Waseda Univ., Tokyo, Japan ; Fuse, N. ; Ohki, Y. ; Okamoto, T.
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Partial discharge (PD) degradation of polyamide both without nanoscale fillers (nanofillers) and with 2,4 and 5 wt% additions of nanofillers was investigated. Such materials were subjected to PDs using the IEC (b) electrodes for evaluation. Comparisons were made as to the surface roughness observed by scanning electron microscopy and atomic force microscopy. It was found that the change in the surface roughness is far smaller in specimens with nanofillers than those without nanofillers, and that the 2 wt% addition is sufficient for improvement of the surface roughness. Furthermore, it was elucidated that the difference of surface roughness of the degraded area due to PDs among the specimens originates from the difference in their crystalline structures. These results indicate that polyamide nanocomposite is more resistance to PDs than polyamide without nanofillers.

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Dielectrics and Electrical Insulation, IEEE Transactions on  (Volume:11 ,  Issue: 5 )