Hybrid round superconductor wires using Nb—Ti filaments

Patent metadata

Field	Value
Publication number	US-12412681-B2
Application number	US-202017801984-A
Country	US
Kind code	B2
Filing date	Dec 23, 2020
Priority date	Feb 24, 2020
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

A round superconductor wire, method for fabricating same, and method for detecting quench in the same are disclosed. A round superconductor wire includes a superconductor wire former and at least one superconductor tape wound on the superconductor wire former. Each superconductor tape includes a substrate, a buffer film stack overlying the substrate, and a superconductor film overlying the buffer film stack.

First claim

What is claimed is:

1. A round superconductor wire comprising:
a superconductor wire former; and
at least one superconductor tape wound on the superconductor wire former, each superconductor tape comprising:
a substrate;
a buffer film stack overlying the substrate; and
a superconductor film overlying the buffer film stack,
wherein the superconducting wire has an engineering current density (J e ) of 400-1500 A/mm 2 at 4.2 K, 20 T.

2. The round superconductor wire of claim 1 , wherein the superconductor wire former comprises a composition selected from a group consisting of Nb—Ti, Nb3Sn, MgB2, Bi—Sr—Ca—Cu—O, and combinations thereof.

3. The round superconductor wire of claim 1 , wherein the superconductor wire former comprises a plurality of superconductor filaments.

4. The round superconductor wire of claim 1 , wherein the superconductor wire former comprises a composite comprising a plurality of superconductor filaments embedded within a non-superconducting metal matrix.

5. The round superconductor wire of claim 1 , wherein the superconductor wire former comprises a composite comprising a plurality of Nb—Ti filaments embedded within a copper matrix.

6. The round superconductor wire of claim 1 , wherein the at least one superconductor tape comprises at least two superconductor tapes.

7. The round superconductor wire of claim 1 , wherein the round superconductor wire comprises a diameter of 1-3 mm, and the superconductor wire former comprises a diameter of 0.4-1.1 mm.

8. A method for fabricating a round superconductor wire, the method comprising:
providing a superconductor wire former; and
winding a superconductor tape around the superconductor wire former;
wherein the superconductor tape comprises:
a substrate;
a buffer film stack overlying the substrate; and
a superconductor film overlying the buffer film stack,
wherein the superconducting wire has an engineering current density (J e ) of 400-1500 A/mm 2 at 4.2 K, 20 T.

9. The method of claim 8 , wherein the superconductor wire former comprises a composition selected from a group consisting of Nb—Ti, Nb3Sn, MgB2, Bi—Sr—Ca—Cu—O, and combinations thereof.

10. The method of claim 8 , wherein the superconductor wire former comprises a plurality of superconductor filaments.

11. The method of claim 8 , wherein the superconductor wire former comprises a composite comprising a plurality of superconductor filaments embedded within a non-superconducting metal matrix.

12. The method of claim 8 , wherein the superconductor wire former comprises a composite comprising a plurality of Nb—Ti filaments embedded within a copper matrix.

13. The method of claim 8 , wherein the superconductor tape is a first superconductor tape, the method further comprises:
winding a second superconductor tape around the first superconductor tape;
wherein the second superconductor tape comprises:
a substrate;
a buffer film stack overlying the substrate; and
a superconductor film overlying the buffer film stack.

14. The method of claim 8 , wherein the round superconductor wire comprises a diameter of 1-3 mm, and the superconductor wire former comprises a diameter of 0.4-1.1 mm.

15. A method for detecting quench in a round superconductor wire, the method comprising:
employing the round superconductor wire in a coil configuration, wherein the round superconductor wire comprises a superconductor tape and a superconductor wire former on which the superconductor tape is wound; and
monitoring current or voltage distribution between the superconductor tape and the superconductor wire former.

16. The method of claim 15 , wherein the superconductor wire former comprises a composition selected from a group consisting of Nb—Ti, Nb3Sn, MgB2, Bi—Sr—Ca—Cu—O, and combinations thereof.

17. The method of claim 15 , wherein the superconductor wire former comprises a plurality of superconductor filaments.

18. The method of claim 15 , wherein the superconductor wire former comprises a composite comprising a plurality of superconductor filaments embedded within a nonsuperconducting metal matrix.

19. The method of claim 15 , wherein the superconductor wire former comprises a composite comprising a plurality of Nb—Ti filaments embedded within a copper matrix.

20. The method of claim 15 , wherein the round superconductor wire comprises a diameter of 1-3 mm, and the superconductor wire former comprises a diameter of 0.4-1.1 mm.

Assignees

• Univ Houston System
• Ampeers Llc

Inventors

• Selvamanickam Venkat
• Kar Soumen

Classifications

• H01B13/0036

  Details · CPC title

• H01B12/08

  Stranded or braided wires · CPC title

• Y02E40/60

  Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment · CPC title

• H01B12/06 Primary

  Films or wires on bases or cores · CPC title