Direct measurements of mechanical properties for large-grain bulk superconductors

T. Miyamoto, K. Nagashima, Naomichi Sakai, Masato Murakami

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Large single-grain bulk RE-Ba-Cu-O (RE: rare earth elements) superconductors with high Jc values can trap magnetic fields much greater than conventional permanent magnets. At present, the maximum trapped fields are essentially limited by the mechanical property of RE-Ba-Cu-O, and therefore, its improvement is critically important. In this study, we measured mechanical properties of large-grain Y-Ba-Cu-O and Sm-Ba-Cu-O bulk superconductors by monitoring the strain with the gauges directly mounted onto the sample surface. The stress was applied to the samples by reducing the external field from 10 to 0 T at 50 K. It is found that the present strain gauge method is useful for direct characterization of mechanical properties of large grain materials. It is also confirmed that Ag addition is effective in improving the mechanical properties of large block Y-Ba-Cu-O and Sm-Ba-Cu-O.

Original languageEnglish
Pages (from-to)41-50
Number of pages10
JournalPhysica C: Superconductivity and its Applications
Volume340
Issue number1
DOIs
Publication statusPublished - 2000 Nov 15
Externally publishedYes

Fingerprint

Superconducting materials
mechanical properties
Mechanical properties
strain gages
Strain gages
Rare earth elements
permanent magnets
Permanent magnets
Gages
rare earth elements
traps
Magnetic fields
Monitoring
magnetic fields

Keywords

  • Crack
  • Mechanical properties
  • Strain-gauge stress

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Direct measurements of mechanical properties for large-grain bulk superconductors. / Miyamoto, T.; Nagashima, K.; Sakai, Naomichi; Murakami, Masato.

In: Physica C: Superconductivity and its Applications, Vol. 340, No. 1, 15.11.2000, p. 41-50.

Research output: Contribution to journalArticle

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