Enhanced thermal properties of epoxy composite containing cubic and hexagonal boron nitride fillers for superconducting magnet applications

Seol Hee Jeong, Jung Bin Song, Kwang Lok Kim, Yoon Hyuck Choi, Haigun Lee

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Superconducting test coils impregnated with epoxy composites containing cubic boron nitride (cBN) particles, hexagonal boron nitride (hBN) particles, and a mixture of cBN/hBN particles were fabricated, and their thermal and electrical properties were investigated using cool-down, over-current, and repetitive-cooling tests. Micro-voids, which may act as major obstacles to the formation of thermally conductive passages, were observed in the epoxy composites containing the cBN or hBN particle fillers alone but were absent in that containing the cBN/hBN particle mixture. The coil impregnated with epoxy containing the cBN/hBN particle mixture also exhibited superior cooling performance and thermal/electrical stabilities, indicating that this composite effectively facilitated heat transfer between the coil and liquid nitrogen. Moreover, the addition of the cBN/hBN filler reduced the difference in thermal contraction between the superconducting tape and epoxy composite. Overall, the use of the epoxy composite containing the cBN/hBN filler shows potential for the development of highly stable superconducting coils with considerably enhanced thermal conductivity and low coefficients of thermal expansion.

Original languageEnglish
Pages (from-to)22-28
Number of pages7
JournalComposites Part B: Engineering
Volume107
DOIs
Publication statusPublished - 2016 Dec 15

Fingerprint

Cubic boron nitride
Boron nitride
Superconducting magnets
Fillers
Thermodynamic properties
Composite materials
Superconducting tapes
Cooling
Liquid nitrogen
boron nitride
Thermal expansion
Thermal conductivity
Electric properties
Heat transfer

Keywords

  • Boron nitride filler
  • Electrical properties
  • Polymer-matrix composites (PMCs)
  • Resins
  • Thermal properties

ASJC Scopus subject areas

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

Cite this

Enhanced thermal properties of epoxy composite containing cubic and hexagonal boron nitride fillers for superconducting magnet applications. / Jeong, Seol Hee; Song, Jung Bin; Kim, Kwang Lok; Choi, Yoon Hyuck; Lee, Haigun.

In: Composites Part B: Engineering, Vol. 107, 15.12.2016, p. 22-28.

Research output: Contribution to journalArticle

@article{fe5b161d3aec4724884cb0caa9a26948,
title = "Enhanced thermal properties of epoxy composite containing cubic and hexagonal boron nitride fillers for superconducting magnet applications",
abstract = "Superconducting test coils impregnated with epoxy composites containing cubic boron nitride (cBN) particles, hexagonal boron nitride (hBN) particles, and a mixture of cBN/hBN particles were fabricated, and their thermal and electrical properties were investigated using cool-down, over-current, and repetitive-cooling tests. Micro-voids, which may act as major obstacles to the formation of thermally conductive passages, were observed in the epoxy composites containing the cBN or hBN particle fillers alone but were absent in that containing the cBN/hBN particle mixture. The coil impregnated with epoxy containing the cBN/hBN particle mixture also exhibited superior cooling performance and thermal/electrical stabilities, indicating that this composite effectively facilitated heat transfer between the coil and liquid nitrogen. Moreover, the addition of the cBN/hBN filler reduced the difference in thermal contraction between the superconducting tape and epoxy composite. Overall, the use of the epoxy composite containing the cBN/hBN filler shows potential for the development of highly stable superconducting coils with considerably enhanced thermal conductivity and low coefficients of thermal expansion.",
keywords = "Boron nitride filler, Electrical properties, Polymer-matrix composites (PMCs), Resins, Thermal properties",
author = "Jeong, {Seol Hee} and Song, {Jung Bin} and Kim, {Kwang Lok} and Choi, {Yoon Hyuck} and Haigun Lee",
year = "2016",
month = "12",
day = "15",
doi = "10.1016/j.compositesb.2016.09.066",
language = "English",
volume = "107",
pages = "22--28",
journal = "Composites Part B: Engineering",
issn = "1359-8368",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Enhanced thermal properties of epoxy composite containing cubic and hexagonal boron nitride fillers for superconducting magnet applications

AU - Jeong, Seol Hee

AU - Song, Jung Bin

AU - Kim, Kwang Lok

AU - Choi, Yoon Hyuck

AU - Lee, Haigun

PY - 2016/12/15

Y1 - 2016/12/15

N2 - Superconducting test coils impregnated with epoxy composites containing cubic boron nitride (cBN) particles, hexagonal boron nitride (hBN) particles, and a mixture of cBN/hBN particles were fabricated, and their thermal and electrical properties were investigated using cool-down, over-current, and repetitive-cooling tests. Micro-voids, which may act as major obstacles to the formation of thermally conductive passages, were observed in the epoxy composites containing the cBN or hBN particle fillers alone but were absent in that containing the cBN/hBN particle mixture. The coil impregnated with epoxy containing the cBN/hBN particle mixture also exhibited superior cooling performance and thermal/electrical stabilities, indicating that this composite effectively facilitated heat transfer between the coil and liquid nitrogen. Moreover, the addition of the cBN/hBN filler reduced the difference in thermal contraction between the superconducting tape and epoxy composite. Overall, the use of the epoxy composite containing the cBN/hBN filler shows potential for the development of highly stable superconducting coils with considerably enhanced thermal conductivity and low coefficients of thermal expansion.

AB - Superconducting test coils impregnated with epoxy composites containing cubic boron nitride (cBN) particles, hexagonal boron nitride (hBN) particles, and a mixture of cBN/hBN particles were fabricated, and their thermal and electrical properties were investigated using cool-down, over-current, and repetitive-cooling tests. Micro-voids, which may act as major obstacles to the formation of thermally conductive passages, were observed in the epoxy composites containing the cBN or hBN particle fillers alone but were absent in that containing the cBN/hBN particle mixture. The coil impregnated with epoxy containing the cBN/hBN particle mixture also exhibited superior cooling performance and thermal/electrical stabilities, indicating that this composite effectively facilitated heat transfer between the coil and liquid nitrogen. Moreover, the addition of the cBN/hBN filler reduced the difference in thermal contraction between the superconducting tape and epoxy composite. Overall, the use of the epoxy composite containing the cBN/hBN filler shows potential for the development of highly stable superconducting coils with considerably enhanced thermal conductivity and low coefficients of thermal expansion.

KW - Boron nitride filler

KW - Electrical properties

KW - Polymer-matrix composites (PMCs)

KW - Resins

KW - Thermal properties

UR - http://www.scopus.com/inward/record.url?scp=84988859518&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84988859518&partnerID=8YFLogxK

U2 - 10.1016/j.compositesb.2016.09.066

DO - 10.1016/j.compositesb.2016.09.066

M3 - Article

AN - SCOPUS:84988859518

VL - 107

SP - 22

EP - 28

JO - Composites Part B: Engineering

JF - Composites Part B: Engineering

SN - 1359-8368

ER -