TY - JOUR
T1 - The crystallization in the welding region for Y-Ba-Cu-O bulk superconductors
AU - Yoshioka, J.
AU - Iida, K.
AU - Sakai, N.
AU - Murakami, M.
N1 - Funding Information:
This work is supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications. J. Y and K. I are grateful to Iwate Techno Foundation for their financial support.
Copyright:
Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.
PY - 2003/4/15
Y1 - 2003/4/15
N2 - We have studied the effect of crystal orientation on the microstructure at joining regions between two blocks of Y-Ba-Cu-O bulk superconductors using Er-Ba-Cu-O sintering plate. The (1 0 0)/(1 0 0) joint suffered from the segregation of second phase and residual liquid phase, which reduced the critical current. In contrast, the (1 1 0)/(1 1 0) joint was free from the segregation of second phase and residual liquid phase. Microstructural observation showed that many triangular crystals were formed from the back melt zone in the (1 1 0)/(1 1 0) joint. On the other hand, the growth front was parallel to the (1 0 0) surfaces in the (1 0 0)/(1 0 0) joint. Such a difference in the growth morphology was responsible for the difference in the superconducting properties of the joints.
AB - We have studied the effect of crystal orientation on the microstructure at joining regions between two blocks of Y-Ba-Cu-O bulk superconductors using Er-Ba-Cu-O sintering plate. The (1 0 0)/(1 0 0) joint suffered from the segregation of second phase and residual liquid phase, which reduced the critical current. In contrast, the (1 1 0)/(1 1 0) joint was free from the segregation of second phase and residual liquid phase. Microstructural observation showed that many triangular crystals were formed from the back melt zone in the (1 1 0)/(1 1 0) joint. On the other hand, the growth front was parallel to the (1 0 0) surfaces in the (1 0 0)/(1 0 0) joint. Such a difference in the growth morphology was responsible for the difference in the superconducting properties of the joints.
KW - (1 1 0)/(1 1 0) joint
KW - Er-Ba-Cu-O sintering plate
KW - Y-Ba-Cu-O bulk
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U2 - 10.1016/S0921-4534(02)02109-3
DO - 10.1016/S0921-4534(02)02109-3
M3 - Conference article
AN - SCOPUS:0037445632
VL - 386
SP - 495
EP - 499
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
T2 - ICMC 2002
Y2 - 16 June 2002 through 20 June 2002
ER -