The crystallization in the welding region for Y-Ba-Cu-O bulk superconductors

J. Yoshioka, K. Iida, Naomichi Sakai, Masato Murakami

Research output: Contribution to journalArticle


We have studied the effect of crystal orientation on the microstructure at joining regions between two blocks of Y-Ba-Cu-O bulk superconductors using Er-Ba-Cu-O sintering plate. The (1 0 0)/(1 0 0) joint suffered from the segregation of second phase and residual liquid phase, which reduced the critical current. In contrast, the (1 1 0)/(1 1 0) joint was free from the segregation of second phase and residual liquid phase. Microstructural observation showed that many triangular crystals were formed from the back melt zone in the (1 1 0)/(1 1 0) joint. On the other hand, the growth front was parallel to the (1 0 0) surfaces in the (1 0 0)/(1 0 0) joint. Such a difference in the growth morphology was responsible for the difference in the superconducting properties of the joints.

Original languageEnglish
Pages (from-to)495-499
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Publication statusPublished - 2003 Apr 15
Externally publishedYes



  • (1 1 0)/(1 1 0) joint
  • Er-Ba-Cu-O sintering plate
  • Y-Ba-Cu-O bulk

ASJC Scopus subject areas

  • Condensed Matter Physics

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