TY - JOUR
T1 - Fracture toughness of SmBaCuO bulk superconductors at cryogenic temperatures
AU - Yoshino, Yasuhiro
AU - Iwabuchi, Akira
AU - Takahashi, Naoki
AU - Katagiri, Kazumune
AU - Noto, Koshichi
AU - Sakai, Naomichi
AU - Murakami, Masato
N1 - Funding Information:
Manuscript received October 21, 2003. This work was supported by Japan Science and Technology Corporation 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”. Y. Yoshino, A. Iwabuchi, and K. Katagiri are with Iwate University, Morioka, 4-3-5 Ueda, Japan (e-mail: tyoshino@iwate-u.ac.jp). N. Takahashi is with a Graduate Student of Iwate University, 4-3-5 Ueda, Japan. K. Noto is with Iwate Industrial Promotion Center, Morioka, Japan. N. Sakai is with Superconductivity Research Laboratory—ISTEC, Tokyo, Minato-ku, Shibaura 1-16-25, Japan. M. Murakami is with Department of Materials Science, Shibaura Institute of Technology, Shibaura, Japan. Digital Object Identifier 10.1109/TASC.2004.830438
PY - 2004/6
Y1 - 2004/6
N2 - Fracture toughness of Sm123 bulk superconductors with 16.7 and 28.6 mol% of Sm211 particles have been investigated by Vickers hardness test at cryogenic temperatures. The hardness test was carried out on (001) plane for two types of SmBCO bulk materials during 40-293 K. The hardness of Sm17 became constant to 5,000 MPa during 40-293 K. However, the hardness of Sm29 increased to 7,380 MPa with decreasing temperatures. In addition, fracture toughness of Sm17 and Sm29 will be discussed calculating from Vickers hardness, Median crack length, Young's modulus and applied load. The fracture toughness of Sm17 became constant to 0.8 MPa√m following the hardness property. The fracture toughness of Sm29 decreased from 0.73 MPa√m at 293 K to 0.67 MPa√m at 40 K.
AB - Fracture toughness of Sm123 bulk superconductors with 16.7 and 28.6 mol% of Sm211 particles have been investigated by Vickers hardness test at cryogenic temperatures. The hardness test was carried out on (001) plane for two types of SmBCO bulk materials during 40-293 K. The hardness of Sm17 became constant to 5,000 MPa during 40-293 K. However, the hardness of Sm29 increased to 7,380 MPa with decreasing temperatures. In addition, fracture toughness of Sm17 and Sm29 will be discussed calculating from Vickers hardness, Median crack length, Young's modulus and applied load. The fracture toughness of Sm17 became constant to 0.8 MPa√m following the hardness property. The fracture toughness of Sm29 decreased from 0.73 MPa√m at 293 K to 0.67 MPa√m at 40 K.
KW - Cryogenic temperatures
KW - Deformation mechanism
KW - Fracture toughness
KW - Vickers hardness
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U2 - 10.1109/TASC.2004.830438
DO - 10.1109/TASC.2004.830438
M3 - Article
AN - SCOPUS:4344569488
VL - 14
SP - 1118
EP - 1121
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 2
ER -