TY - JOUR
T1 - Effect of micro-ceramic fillers in epoxy composites on thermal and electrical stabilities of GdBCO coils
AU - Jeong, Seol Hee
AU - Song, Jung Bin
AU - Choi, Yoon Hyuck
AU - Kim, Seong Gyeom
AU - Go, Byeong Soo
AU - Park, Minwon
AU - Lee, Haigun
N1 - Funding Information:
This work was supported by the Materials and Components Technology Development Program of KEIT [ 10053590 , Development of MgB 2 wire and coils with high critical currents and long length for superconducting medical·electric power equipment].
Publisher Copyright:
© 2016 Elsevier Ltd. All rights reserved.
PY - 2016/6/1
Y1 - 2016/6/1
N2 - This paper reports the effects of ceramic fillers for epoxy composites used as impregnation materials on the thermal and electrical stabilities of three GdBCO coils impregnated with epoxy alone, with an epoxy/AlN composite, and with an epoxy/BN composite. During cool-down to 77 K, due to the high thermal conductivity of the filler materials, the coils impregnated with the epoxy composites that included the AlN and BN fillers exhibited faster cooling times than the coil impregnated with epoxy resin alone. Moreover, the addition of the filler could facilitate quench heat dissipation as well as ameliorate the discrepancy of thermal contraction between the GdBCO CC tape and the epoxy. In particular, the coil impregnated with the epoxy/BN composite exhibited superior performance in cooling, over-current, and repetitive-cooling tests. Therefore, the epoxy/BN composite could be the most effective impregnating material for the development of highly-stable superconducting rotating machines, with considerably enhanced reliability.
AB - This paper reports the effects of ceramic fillers for epoxy composites used as impregnation materials on the thermal and electrical stabilities of three GdBCO coils impregnated with epoxy alone, with an epoxy/AlN composite, and with an epoxy/BN composite. During cool-down to 77 K, due to the high thermal conductivity of the filler materials, the coils impregnated with the epoxy composites that included the AlN and BN fillers exhibited faster cooling times than the coil impregnated with epoxy resin alone. Moreover, the addition of the filler could facilitate quench heat dissipation as well as ameliorate the discrepancy of thermal contraction between the GdBCO CC tape and the epoxy. In particular, the coil impregnated with the epoxy/BN composite exhibited superior performance in cooling, over-current, and repetitive-cooling tests. Therefore, the epoxy/BN composite could be the most effective impregnating material for the development of highly-stable superconducting rotating machines, with considerably enhanced reliability.
KW - A. Particle-reinforcement
KW - A. Polymer-matrix composites (PMCs)
KW - B. Electrical properties
KW - B. Thermal properties
UR - http://www.scopus.com/inward/record.url?scp=84962665751&partnerID=8YFLogxK
U2 - 10.1016/j.compositesb.2016.03.065
DO - 10.1016/j.compositesb.2016.03.065
M3 - Article
AN - SCOPUS:84962665751
SN - 1359-8368
VL - 94
SP - 190
EP - 196
JO - Composites Part B: Engineering
JF - Composites Part B: Engineering
ER -