TY - JOUR
T1 - An evaluation of mechanical properties of YBaCuO and (Sm,Gd)BaCuO bulk superconductors using vickers hardness test at cryogenic temperatures
AU - Yoshino, Y.
AU - Iwabuchi, A.
AU - Katagiri, K.
AU - Noto, K.
AU - Sakai, N.
AU - Murakami, M.
N1 - Funding Information:
Manuscript received September 25, 2001. 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” and also supported by NEDO. Y. Yoshino is with the Japan Society of the Promotion of Science, Iwate University, Morioka, Uueda4-3-5 Japan (e-mail: tyoshino@iwate-u.ac.jp). A. Iwabuchi is with Iwate University, Morioka, Ueda4-3-5 Japan (e-mail: iwabuchi@iwate-u.ac.jp). K. Katagiri and K. Noto are with Iwate University, Morioka, Ueda4-3-5 Japan. (e-mail: katagiri@iwate-u.ac.jp). N. Sakai and M. Murakami are with the Superconductivity Research Laboratory-ISTEC, Tokyo, Minato-ku, Shibaura 1-16-25, Japan. Publisher Item Identifier S 1051-8223(02)04281-1.
PY - 2002/3
Y1 - 2002/3
N2 - Vickers hardness properties of bulk superconductors have been investigated to estimate the mechanical properties of bulk materials. However, the test at cryogenic temperatures had not been conducted at all. Then we conducted Vickers hardness test on (001) plane of YBaCuO and (Sm,Gd)BaCuO bulk superconductors from 40 to 293 K. The hardness of YBaCuO and (Sm,Gd)BaCuO increased with decreasing temperature up to 19 000 MPa and 10 000 MPa, respectively. Furthermore, the cracks caused by the indentation were observed with SEM, and the fracture toughness K IC at cryogenic temperatures was calculated. The K IC of YBaCuO and (Sm,Gd)BaCuO decreased with decreasing temperature to 0.6 MPa√m and 0.8 MPa√m, respectively.
AB - Vickers hardness properties of bulk superconductors have been investigated to estimate the mechanical properties of bulk materials. However, the test at cryogenic temperatures had not been conducted at all. Then we conducted Vickers hardness test on (001) plane of YBaCuO and (Sm,Gd)BaCuO bulk superconductors from 40 to 293 K. The hardness of YBaCuO and (Sm,Gd)BaCuO increased with decreasing temperature up to 19 000 MPa and 10 000 MPa, respectively. Furthermore, the cracks caused by the indentation were observed with SEM, and the fracture toughness K IC at cryogenic temperatures was calculated. The K IC of YBaCuO and (Sm,Gd)BaCuO decreased with decreasing temperature to 0.6 MPa√m and 0.8 MPa√m, respectively.
KW - Cryogenic temperatures
KW - Deformations mechanism
KW - Fracture toughness
KW - Vickers hardness
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U2 - 10.1109/TASC.2002.1018747
DO - 10.1109/TASC.2002.1018747
M3 - Conference article
AN - SCOPUS:0036509953
VL - 12
SP - 1755
EP - 1758
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 1
T2 - 17th Annual Conference on Magnet Technology
Y2 - 24 September 2001 through 28 September 2001
ER -