TY - JOUR
T1 - Direct measurements of mechanical properties for large-grain bulk superconductors
AU - Miyamoto, T.
AU - Nagashima, K.
AU - Sakai, N.
AU - Murakami, M.
N1 - Funding Information:
This work was partially supported by New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Application.
Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 2000/11/15
Y1 - 2000/11/15
N2 - Large single-grain bulk RE-Ba-Cu-O (RE: rare earth elements) superconductors with high Jc values can trap magnetic fields much greater than conventional permanent magnets. At present, the maximum trapped fields are essentially limited by the mechanical property of RE-Ba-Cu-O, and therefore, its improvement is critically important. In this study, we measured mechanical properties of large-grain Y-Ba-Cu-O and Sm-Ba-Cu-O bulk superconductors by monitoring the strain with the gauges directly mounted onto the sample surface. The stress was applied to the samples by reducing the external field from 10 to 0 T at 50 K. It is found that the present strain gauge method is useful for direct characterization of mechanical properties of large grain materials. It is also confirmed that Ag addition is effective in improving the mechanical properties of large block Y-Ba-Cu-O and Sm-Ba-Cu-O.
AB - Large single-grain bulk RE-Ba-Cu-O (RE: rare earth elements) superconductors with high Jc values can trap magnetic fields much greater than conventional permanent magnets. At present, the maximum trapped fields are essentially limited by the mechanical property of RE-Ba-Cu-O, and therefore, its improvement is critically important. In this study, we measured mechanical properties of large-grain Y-Ba-Cu-O and Sm-Ba-Cu-O bulk superconductors by monitoring the strain with the gauges directly mounted onto the sample surface. The stress was applied to the samples by reducing the external field from 10 to 0 T at 50 K. It is found that the present strain gauge method is useful for direct characterization of mechanical properties of large grain materials. It is also confirmed that Ag addition is effective in improving the mechanical properties of large block Y-Ba-Cu-O and Sm-Ba-Cu-O.
KW - Crack
KW - Mechanical properties
KW - Strain-gauge stress
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U2 - 10.1016/S0921-4534(00)00660-2
DO - 10.1016/S0921-4534(00)00660-2
M3 - Article
AN - SCOPUS:0034668495
SN - 0921-4534
VL - 340
SP - 41
EP - 50
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 1
ER -