Effects of joining conditions on the structures and properties of joints of REBCO coated conductors

✍ Scribed by T. Maebatake; N. Mori; R. Teranishi; M. Mukaida; K. Yamada; M. Miura; M. Yoshizumi; T. Izumi

• Book ID: 104084643
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 543 KB
• Volume: 470
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2010.05.112

✦ Synopsis

We investigated the joining of two REBCO (REBa 2 Cu 3 O 7ÀX , RE = Y, Gd) coated conductors using the diffusion joint process. REBCO coated conductors with stabilizing silver layer were joined by various joining conditions. Two pieces of the silver layer of tapes were overlapped in a face to face manner. Then, the pieces were pressurized and heat-treated at about 623-673 K under a pressure using some weights in oxygen atmosphere. Finally, the joint resistivity was obtained as low as about 10 nX cm 2 by 10 MPa for YBCO tape. The joint resistivity of the GdBCO tape was 50-60 nX cm 2 , which was higher than YBCO, but improved to 37 nX cm 2 at 10 MPa by improving the joining conditions. Influences of joining conditions such as pressure and evenness of specimens and holders were investigated on joint adhesion and resistivity.