Fracture toughness of Sm123 bulk superconductors evaluated by tensile and bending tests

Kazumune Katagiri, Akira Murakami, Taichi Okudera, Yasuhiro Yoshino, Akira Iwabuchi, Koshichi Noto, Naomichi Sakai, Masato Murakami

研究成果: Article査読

7 被引用数 (Scopus)

抄録

The effects of test temperature and Sm211 (2BaCuO5) secondary phase particles on the fracture toughness of the Sm123 (SmBa 2Cu3Ox) single grain bulk superconductors were investigated by tensile and bending tests using the V-notched specimens. The correlation between the obtained fracture toughness by tensile and bending test was not necessarily good. The fracture toughness obtained by the indentation method was lower than them. The tensile fracture toughness for the crack propagation in the c-axis, 1.2-1.3 MPa m1/2, was higher than that in the direction perpendicular to the c-axis, 1.0-1.1 MPa m1/2. Although the former increased with increase in the Sm211 molar fraction, the latter did not increase. There was no appreciable difference between the fracture toughness obtained by the tensile tests at LNT and that at RT, while the fracture toughness from the indentation method at LNT was slightly lower than that at RT.

本文言語English
ページ(範囲)1046-1049
ページ数4
ジャーナルIEEE Transactions on Applied Superconductivity
14
2
DOI
出版ステータスPublished - 2004 6

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
  • 電子工学および電気工学

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