Fracture toughness evaluation of YBCO bulk superconductor

T. Okudera, A. Murakami, K. Katagiri, K. Kasaba, Y. Shoji, K. Noto, N. Sakai, M. Murakami

研究成果: Conference article査読

26 被引用数 (Scopus)


Evaluation of the fracture toughness of a Y-Ba-Cu-O bulk superconductor with 28.6 mol% Y-211 and 15 wt.% Ag has been investigated by tensile tests at room temperature using specimens with a sharp V-notch. The notch was introduced into the specimens such that its direction of depth was parallel or perpendicular to the c-axis and the loading direction was in the a(b)-axis. Fracture toughness evaluation by three-point bending tests was also carried out. In addition, usual tensile tests and three-point bending tests were also carried out in the specimens without V-notch. The scatter of measured fracture toughness values by the bending tests, 1.6-2.1 MPa m1/2, was less as compared with that by the tensile tests, 1.1-2.5 MPa m1/2. However, the average value in tensile tests 1.9 MPa m1/2 coincided with that in bending tests. The maximum and the average value of bending strength, 109 and 104 MPa, were higher than those of tensile strength, 72 and 56 MPa, respectively.

ジャーナルPhysica C: Superconductivity and its applications
出版ステータスPublished - 2003 10月
イベントProceedings of the 15th International Symposium on Superconduc - Yokohama, Japan
継続期間: 2002 11月 112002 11月 13

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学


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