Abstract
Nb/sub 3/Al multifilamentary (MF) wire can be fabricated by the composite process using various Al-based alloy cores and pure Nb matrix. Additive elements of Mg, Ag, Cu and Zn harden the Al core preferentially and then improve the workability of the Nb/Al composite, permitting it to be cold-drawn into a wire with ultrafine Al-based alloy filaments (filament number: 1.8 million, diameter: about 0.1 mu m). Reacted wires at 700-900 degrees C show T/sub c/ of 15-16 K, mu /sub 0/H/sub c2/ (4.2 K) of 21-22 T and J/sub c/ (4.2 K, 10 T) of 1-1.5*10/sup 9/ A/m/sup 2/. A two-stage reaction consisting of a reaction above 950 degrees C and a subsequent reaction around 700 degrees C is carried out to improve critical values; T/sub c/ and mu /sub 0/H/sub c2/ are increased to 17.4 K and 25.4 T, respectively. Excellent superconducting properties involving good strain tolerance ( epsilon /sub irrev/=1.3%) indicate that this Nb/sub 3/Al is very promising for practical high-field superconducting cables. >
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
