Effect of micro-ceramic fillers in epoxy composites on thermal and electrical stabilities of GdBCO coils

Seol Hee Jeong; Jung Bin Song; Yoon Hyuck Choi; Seong Gyeom Kim; Byeong Soo Go; Minwon Park; Haigun Lee

doi:10.1016/j.compositesb.2016.03.065

Effect of micro-ceramic fillers in epoxy composites on thermal and electrical stabilities of GdBCO coils

Seol Hee Jeong, Jung Bin Song, Yoon Hyuck Choi, Seong Gyeom Kim, Byeong Soo Go, Minwon Park, Haigun Lee

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	190-196
Number of pages	7
Journal	Composites Part B: Engineering
Volume	94
DOIs	https://doi.org/10.1016/j.compositesb.2016.03.065
Publication status	Published - 2016 Jun 1

Bibliographical note

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.

Keywords

A. Particle-reinforcement
A. Polymer-matrix composites (PMCs)
B. Electrical properties
B. Thermal properties

ASJC Scopus subject areas

Ceramics and Composites
Mechanics of Materials
Mechanical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.compositesb.2016.03.065

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title = "Effect of micro-ceramic fillers in epoxy composites on thermal and electrical stabilities of GdBCO coils",

abstract = "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.",

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note = "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: {\textcopyright} 2016 Elsevier Ltd. All rights reserved.",

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AU - Choi, Yoon Hyuck

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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.

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Effect of micro-ceramic fillers in epoxy composites on thermal and electrical stabilities of GdBCO coils

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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