Stability of the mechanical properties of bulk RE-Ba-Cu-O with resin impregnation

M. Tomita, Masato Murakami

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Large single-grain bulk RE-Ba-Cu-O (RE: rare earth elements) superconductors can trap large fields exceeding several teslas and thus can function as very strong quasi-permanent magnets. However, for large grain materials, either the thermal stress or the electromagnetic stress sometimes causes cracking. We have recently found that epoxy resin can penetrate into the bulk superconductors when they are immersed in liquefied resin under low pressures. Dispersing quartz filler can control the thermal expansion coefficient of the resin. With this process, the cracks that are prone to be generated on the large-diameter bulk superconductors can be effectively prevented. In order to reinforce the resin, we also employed the process to cover the bulk surface with the glass fiber fabric followed by resin impregnation. It has been confirmed that both the stability and field-trapping capability are greatly improved with such resin impregnation.

Original languageEnglish
Pages (from-to)358-362
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume354
Issue number1-4
DOIs
Publication statusPublished - 2001 May
Externally publishedYes

Fingerprint

Impregnation
resins
Resins
mechanical properties
Mechanical properties
Superconducting materials
Epoxy Resins
Quartz
dispersing
epoxy resins
glass fibers
thermal stresses
Rare earth elements
fillers
permanent magnets
Thermal stress
Epoxy resins
Glass fibers
Permanent magnets
Thermal expansion

Keywords

  • Bulk superconductor
  • Epoxy resins
  • Mechanical strength
  • Trapped magnetic field

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Stability of the mechanical properties of bulk RE-Ba-Cu-O with resin impregnation. / Tomita, M.; Murakami, Masato.

In: Physica C: Superconductivity and its Applications, Vol. 354, No. 1-4, 05.2001, p. 358-362.

Research output: Contribution to journalArticle

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