Rare earth barium copper oxide magnet coils and methods

Patent metadata

Field	Value
Publication number	US-2019267172-A1
Application number	US-201916283187-A
Country	US
Kind code	A1
Filing date	Feb 22, 2019
Priority date	Feb 23, 2018
Publication date	Aug 29, 2019
Grant date	—

Abstract

Tapes and coils for superconducting magnets are provided, along with methods of making the tapes and coils. In one embodiment, the coil includes a rare earth barium copper oxide (REBCO) superconducting tape; and a thin resistive layer of copper oxide, Cr, Ni, or Ni—P substantially coated onto the REBCO superconducting tape, wherein the coated REBCO superconducting tape is wound into a coil form. In another embodiment, the coil includes at least two REBCO superconducting tapes; and a stainless steel tape interlay disposed between the at least two REBCO superconducting tapes, wherein the stainless steel tape comprises a plating layer of nickel or copper, and wherein the at least two REBCO superconducting tapes together with the stainless steel tape interlay are wound into a coil form.

First claim

We claim:

1 . A coil for a superconducting magnet comprising:
a rare earth barium copper oxide (REBCO) superconducting tape; and a thin resistive layer of copper oxide, Cr, Ni, or Ni—P substantially coated onto the REBCO superconducting tape, wherein the coated REBCO superconducting tape is wound into a coil form.

2 . The coil of claim 1 , which is in the form of a no-insulation REBCO coil.

3 . The coil of claim 1 , wherein the thin resistive layer is about 1 μm thick.

4 . The coil of claim 1 , wherein the coated REBCO superconducting tape has a turn-to-turn contact resistivity (R c ) that is at least about 10 times higher than that of a comparative REBCO superconducting tape without a thin resistive layer of copper oxide, Cr, Ni, or Ni—P.

5 . The coil of claim 1 , wherein the coated REBCO superconducting tape has a turn-to-turn contact resistivity (R c ) that is at least about 100 times higher than that of a comparative REBCO superconducting tape without a thin resistive layer of copper oxide, Cr, Ni, or Ni—P.

6 . The coil of claim 1 , wherein the coated REBCO superconducting tape has a turn-to-turn contact resistivity (R c ) that is at least about 1,000 times higher than that of a comparative REBCO superconducting tape without a thin resistive layer of copper oxide, Cr, Ni, or Ni—P

7 . The coil of claim 1 , wherein:
the thin resistive layer comprises copper oxide, and the magnet further comprises a stainless steel layer attached to the REBCO superconducting tape.

8 . The coil of claim 1 , wherein the thin resistive layer of copper oxide, Cr, Ni, or Ni—P is substantially coated onto the REBCO superconducting tape by a plating process or by a physical vapor deposition process.

9 . A coil for a superconducting magnet comprising:
at least two REBCO superconducting tapes; and a stainless steel tape interlay disposed between the at least two REBCO superconducting tapes, wherein the stainless steel tape comprises a plating layer of nickel or copper, and wherein the at least two REBCO superconducting tapes together with the stainless steel tape interlay are wound into a coil form.

10 . The coil of claim 9 , which is in the form of a no-insulation REBCO coil.

11 . The coil of claim 9 , wherein the stainless steel tape is about 50 μm thick.

12 . The coil of claim 9 , wherein the plating layer is about 1 μm thick.

13 . The coil of claim 9 , wherein the two REBCO superconducting tapes with the interlay have a turn-to-turn contact resistivity (R c ) that is at least about 10 times higher than that of comparative REBCO superconducting tapes without a stainless steel tape interlayer.

14 . The coil of claim 9 , wherein the two REBCO superconducting tapes with the interlay have a turn-to-turn contact resistivity (R c ) that is at least about 100 times higher than that of comparative REBCO superconducting tapes without a stainless steel tape interlayer.

15 . The coil of claim 9 , wherein the two REBCO superconducting tapes with the interlay have a turn-to-turn contact resistivity (R c ) that is at least about 10 times lower than that of comparative REBCO superconducting tapes without nickel or copper plating on a stainless steel tape interlayer.

16 . The coil of claim 9 , wherein the two REBCO superconducting tapes with the interlay have a turn-to-turn contact resistivity (R c ) that is at least about 100 times lower than that of a comparative comparative REBCO superconducting tapes without nickel or copper plating on a stainless steel tape interlayer.

17 . A method of making a coil for a superconducting magnet, the method comprising:
providing a REBCO superconducting tape; forming a thin resistive layer of copper oxide, Cr, Ni, or Ni—P substantially coating the REBCO superconducting tape; and then winding the coated REBCO tape into a coil.

18 . The method of claim 17 , wherein the thin resistive layer is formed on the REBCO superconducting tape by a plating process or by a physical vapor deposition process.

19 . The method of claim 17 , wherein the thin resistive layer is formed on the REBCO superconducting tape by a plating process in which the REBCO superconducting tape is contacted with an electrolyte solution selected from an Ebonol C solution, a Caswell nickel solution, a Caswell nickel-phosphorous solution, a Cr 2 O 3 and H 2 SO 4 aqueous solution, and a CuSO 4 aqueous solution.

20 . The method of claim 17 , wherein the thin resistive layer of copper oxide, Cr, Ni, or Ni—P is about 1 μm thick.

21 . A method of making a coil for a superconducting magnet, the method comprising:
plating a stainless steel tape with nickel or copper to form a plated stainless steel tape; positioning the plated stainless steel tape between two REBCO superconducting tapes; and winding the two REBCO superconducting tapes and the stainless steel tape into a coil.

22 . The method of claim 21 , wherein plating the stainless steel tape comprises an electroplating process.

23 . The method of claim 21 , wherein the stainless steel tape is about 50 μm thick.

24 . The method of claim 23 , wherein the nickel or copper plating is about 1 μm thick.

25 . A superconducting magnet comprising two or more of the coils according to claim 2 .

26 . A superconducting magnet comprising two or more of the coils according to claim 10 .

Assignees

• Univ Florida State Res Found

Inventors

• Lu Jun
• Levitan Jeremy

Classifications

• H01F1/342

  Oxides (H01F1/36 and H01F1/38 take precedence) · CPC title

• H01F6/06 Primary

  Coils, e.g. winding, insulating, terminating or casing arrangements therefor · CPC title

• H01F41/061

  Winding flat conductive wires or sheets · CPC title

• H01F6/02

  Quenching; Protection arrangements during quenching {(protection circuits H02H7/001)} · CPC title

• H01F41/048

  Superconductive coils · CPC title