Investigation of different angle joining of superconducting tapes

Journal Article · Sun Jun 01 04:00:00 EDT 1997 · Advances in Cryogenic Engineering

OSTI ID:482091

Liu, H K; Bhasale, R; Dou, S X ^[1]

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1. Univ. of Wollongong (Australia)

Joining of superconducting wires and tapes is of significant importance for fabricating long conductors and for installation of superconductor devices. A technique for joining Ag-sheathed Bi-based superconducting single and multifilament tapes fabricated using a powder-in-tube technique has been developed. A number of joint configurations have been investigated for Ag-sheathed Bi-based superconducting single core and multifilament tapes. When the joining was performed at the final stage of the thermomechanical processes, the transport critical current (I{sub c}) of the Ag-superconductor-superconductor-Ag (Ag-S-S-Ag) joining remains 60-80 % of I{sub c} value of the normal region for single tapes with 0{degrees} joining. 45{degrees} joining for single core tapes can retain {approximately}20 % of the I{sub c} of the normal region while 90{degrees} joining can hold less than 10% of the I{sub c} of the normal region. The 0{degrees} joining for the multifilament holds 40 to 60% of current of the normal regions of the tapes. If the joining is carried out at the first stage of thermomechanical processes, the joint can retain nearly 100% of the J{sub c}. This type of joining is useful to overcome the limitation of the powder-in-tube process. These results suggest that the critical current in the tapes is limited by high angle boundaries since the high angle joining results in a large proportion of high angle boundaries.

• OSTI ID: 482091
• Report Number(s): CONF-950722--
• Journal Information: Advances in Cryogenic Engineering, Journal Name: Advances in Cryogenic Engineering Vol. 42B; ISSN 0065-2482; ISSN ACYEAC
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
COPPER OXIDES
CRITICAL CURRENT
ELECTRIC CONTACTS
HIGH-TC SUPERCONDUCTORS
SUPERCONDUCTING WIRES