Mechanical properties of RE-Ba-Cu-O bulk superconductors

N. Sakai, S. J. Seo, K. Inoue, T. Miyamoto, M. Murakami

Research output: Contribution to journalConference articlepeer-review

57 Citations (Scopus)


It is critically important to increase mechanical properties of RE-Ba-Cu-O bulk superconductors for practical applications. In this paper, we first studied the formation mechanism of cracking in Y-Ba-Cu-O and Sm-Ba-Cu-O massive blocks. The cracking is formed with the thermal stress during the thermal cycles, in particular, for large grain samples. The tetragonal to orthorhombic phase transformation also causes cracking mainly along the (001) cleavage planes. In addition, the cracks have the chance to propagate when strong magnetic fields are applied. Sm-Ba-Cu-O seems to be intrinsically more sensitive to cracking due to the larger lattice parameters than Y-Ba-Cu-O. However, microstructure is more important in determining the mechanical properties such as the homogeneity of RE211 inclusions or pores. Ag addition was found to be effective in improving the mechanical properties through the densification and/or the reduction in defect density.

Original languageEnglish
Pages (from-to)107-111
Number of pages5
JournalPhysica C: Superconductivity and its applications
Issue number1
Publication statusPublished - 2000 Jun
Event9th Japan-US Workshop on High-Tc Superconductors - Yamanashi, Jpn
Duration: 1999 Oct 131999 Oct 15

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


Dive into the research topics of 'Mechanical properties of RE-Ba-Cu-O bulk superconductors'. Together they form a unique fingerprint.

Cite this