Materials pp 339-346 | Cite as

Several Properties of Impregnating Epoxy Resins Used for Superconducting Coils

  • Hideshige Moriyama
  • Yoshiyuki Inoue
  • Hisayasu Mitsui
  • Yoshinao Sanada
  • Yoshio Kobayashi
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 38)

Abstract

In order to find the most appropriate vacuum-pressure impregnating epoxy resin for superconducting coils, three types of epoxy resin were experimentally investigated from various points of view. Those epoxy resins were amine curing type A, anhydride curing type B with tertiary amine accelerator, and anhydride curing type C without accelerator.

From the investigations, resin A was found to be superior in thermal shock resistance than resins B and C because of its large tensile fracture strain at cryogenic temperature and its small cure shrinkage. However, the test coil impregnated with resin A experienced more repeated premature quenches than the coil impregnated with resin C. This result might be related to the crackings which started from microscopic defects, and which occurred gradually in resin A compared with resins B and C. Moreover, the viscosity of resin A increased more rapidly during the impregnating process than that of resins B and C, so that resins B and C appear to be more appropriate for large superconducting coils than resin A.

Keywords

Adhesive Strength Cryogenic Temperature Acid Anhydride Thermal Contraction Training Characteristic 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Springer Science+Business Media New York 1992

Authors and Affiliations

  • Hideshige Moriyama
    • 1
  • Yoshiyuki Inoue
    • 1
  • Hisayasu Mitsui
    • 1
  • Yoshinao Sanada
    • 1
  • Yoshio Kobayashi
    • 2
  1. 1.Toshiba CorporationYokohamaJapan
  2. 2.Super-GMOsakaJapan

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