TY - JOUR
T1 - Fracture toughness of Sm123 bulk superconductors evaluated by tensile and bending tests
AU - Katagiri, Kazumune
AU - Murakami, Akira
AU - Okudera, Taichi
AU - Yoshino, Yasuhiro
AU - Iwabuchi, Akira
AU - Noto, Koshichi
AU - Sakai, Naomichi
AU - Murakami, Masato
N1 - Funding Information:
Manuscript received October 21, 2003. This work was supported in part by the Grant-in-Aid for Scientific Research, Japan Society for Promotion of Science and Japan Science and Technology Corporation, Japan, under the Joint-Research Project for Regional Intensive in Iwate Prefecture, on “Development of practical applications of magnetic field technology for use in the region and in everyday living.” K. Katagiri, T. Okudera, Y. Yoshino, A. Iwabuchi, and K. Noto are with the Faculty of Engineering, Iwate University, Morioka, 020-8551 Japan (e-mail: katagiri@iwate-u.ac.jp).
PY - 2004/6
Y1 - 2004/6
N2 - 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.
AB - 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.
KW - Bending test
KW - Cryogenic temperature
KW - Sm123 bulk superconductor
KW - Tensile test
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U2 - 10.1109/TASC.2004.830390
DO - 10.1109/TASC.2004.830390
M3 - Article
AN - SCOPUS:4344678336
SN - 1051-8223
VL - 14
SP - 1046
EP - 1049
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 2
ER -