TY - JOUR
T1 - Tree initiation phenomena in nanostructured epoxy composites
AU - Chen, Yu
AU - Imai, Takahiro
AU - Ohki, Yoshimichi
AU - Tanaka, Toshikatsu
N1 - Funding Information:
This research was financially supported in part by a Grand-in-Aid from NEDO, and by Waseda University IPS Project A0715782, to which the authors are indebted.
PY - 2010/10
Y1 - 2010/10
N2 - Tree initiation time was evaluated by a pulse detection system to detect a small PD (partial discharge) signal that might take place at first just after a tree was formed. Six kinds of materials were prepared for evaluation, i.e. base epoxy resin, microcomposite, two kinds of nanocomposites, and two kinds of nano-micro-mixed-composites. Lengths of trees detected were around 100 μm in our experiments. As a result, it was clarified that the tree initiation time is prolonged by the nanofiller inclusion, but shortened by the microfiller filling. Furthermore, the co-addition of nanofillers to the microcomposite increases the tree initiation time again in comparison to the once-shortened time in the microcomposite. As for the PD erosion evaluated for the same materials, a good correlation was confirmed between the tree initiation time and PD resistance. This correlation indicates that the tree formation process includes PD erosion. Simulation results show that trees should propagate between fillers.
AB - Tree initiation time was evaluated by a pulse detection system to detect a small PD (partial discharge) signal that might take place at first just after a tree was formed. Six kinds of materials were prepared for evaluation, i.e. base epoxy resin, microcomposite, two kinds of nanocomposites, and two kinds of nano-micro-mixed-composites. Lengths of trees detected were around 100 μm in our experiments. As a result, it was clarified that the tree initiation time is prolonged by the nanofiller inclusion, but shortened by the microfiller filling. Furthermore, the co-addition of nanofillers to the microcomposite increases the tree initiation time again in comparison to the once-shortened time in the microcomposite. As for the PD erosion evaluated for the same materials, a good correlation was confirmed between the tree initiation time and PD resistance. This correlation indicates that the tree formation process includes PD erosion. Simulation results show that trees should propagate between fillers.
KW - Nanocomposite
KW - nanostructured epoxy composites
KW - tree initiation time
UR - http://www.scopus.com/inward/record.url?scp=77957908892&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77957908892&partnerID=8YFLogxK
U2 - 10.1109/TDEI.2010.5595552
DO - 10.1109/TDEI.2010.5595552
M3 - Article
AN - SCOPUS:77957908892
SN - 1070-9878
VL - 17
SP - 1509
EP - 1515
JO - IEEE Transactions on Dielectrics and Electrical Insulation
JF - IEEE Transactions on Dielectrics and Electrical Insulation
IS - 5
M1 - 5595552
ER -