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US3676577A Expired / Lapsed US ⏱️ 0.0 years remaining

Superconductors containing flux traps

Assignee: General Electric Co
•
Filing: 1970-06-15
•
Granted: 1972-07-11
•
Expires: 1990-06-15
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Abstract

Abstract The properties of superconductors of the niobium-tin type may be improved by the provision of flux trapping or pinning sites therein in the form of a dispersion of stable particles formed by the reaction between a metal such as zirconium for example, and a non-metal such as oxygen, nitrogen or carbon to form the corresponding metal oxides, nitrides or carbides. While the particle forming metal may be present as an alloying ingredient in either the tin bath through which the niobium strand is passed, or as an alloying ingredient in the niobium strand, where the superconductor is Nb3Sn, it is preferred to use a niobiumzirconium alloy. In the process, a niobium-zirconium alloy strand is passed through a molten tin bath to form a tin coating thereon and subsequently heat treated in the presence of the non-metal reactant whereby an Nb3Sn superconductive layer is formed containing the stable reaction product dispersion.

Inventors

  • 👤 Donald L Martin
  • 👤 Mark G Benz

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 02:53
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/20; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/884; Y10S505/887; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 57 words
As an article of manufacture according to claim 1 wherein initially said parent metal contains a solute metal having an atom diameter at least 0.29A larger than the diameter of the atom of said parent metal in an amount ranging from at least about 0.1 weight percent up to about 25 weight percent of said parent metal.
Claim 2
Dependent Claim 15 words
As an article of manufacture according to claim 2 wherein said solute metal is zirconium.
Claim 3
Dependent Claim 21 words
As an article of manufacture according to claim 3 wherein said parent metal is niobium and said reactant metal is tin.
Claim 4
Dependent Claim 40 words
As an article of manufacture according to claim 2 wherein a particulate phase is present within said strands which is the reaction product of said solute metal with a non-metal selected from the group consisting of oxygen, nitrogen and carbon.
Claim 5
Dependent Claim 15 words
An an article of manufacture according to claim 5 wherein said solute metal is zirconium.
Claim 6
Dependent Claim 21 words
As an article of manufacture according to claim 6 wherein said parent metal is niobium and said reactant metal is tin.
Claim 7
Dependent Claim 28 words
As an article of manufacture according to claim 1 wherein said coextensive strands of said parent metal extend in a substantially parallel manner through said reactant metal matrix.
Claim 8
Dependent Claim 23 words
As an article of manufacture according to claim 1 wherein said coextensive strands are twisted together helically and have a spiral fluted surface.
Claim 9
Dependent Claim 21 words
As an article of manufacture according to claim 1 wherein said electrically conductive wire is insulated with an electrically insulating material.
Claim 10
Dependent Claim 22 words
As an article of manufacture according to claim 10 wherein said electrically insulating material is thermally stable up to about 975* C.
Claim 11
Dependent Claim 24 words
As an article of manufacture according to claim 1 wherein each said strand of parent metal has a maximum diameter of about 5 mils.
Claim 12
Dependent Claim 116 words
As an article of manufacture an electrically conductive wire comprising a plurality of individual, continuous metal strands composed of a metal capable of forming a superconductive alloy in combination with a second metal, which metal contains up to 25 percent dissolved zirconium, a second metal present principally as a matrix through which said strands extend, said second metal having a melting point lower than and being capable of reacting with the metal of said strands to form a superconductive metal alloy, and a layer in the outer surface of said second metal which contains a nonmetal capable of reacting with the zirconium to form a particulate phase within the strands and act as flux pinning sites.

References Cited (Backward Citations)

US3273008A Cited
US3277564A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-07-11 1976-01-10 1976-07-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-07-11 1980-01-10 1980-07-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-07-11 1984-01-10 1984-07-11 $7700.00 Window Closed / Lapsed

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