Patent US4411959A successfully refreshed from Google Patents.
US4411959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submicron-particle ductile superconductor
Assignee: Westinghouse Electric Corp
•
Filing: 1981-08-17
•
Granted: 1983-10-25
•
Expires: 2001-08-17
Abstract
Abstract A submicron-particle ductile superconductor and method of fabricating the same wherein the submicron particles (e.g., 300 Angstroms) of a superconductor (e.g., NbC) are encapsulated in a metal tube (e.g., copper) and then fabricated down to fine wire in the absence of sintering of reaction annealing. Because of the fluid-like properties of the unsintered submicron-particle powdered core, the composite fabricated wire retains ductility and resistance to fracture while exhibiting superconducting properties approaching those of the bulk material in the core. Multifilamentary composites are obtained by bundling and fabricating the bundle down in a required number of steps.
Inventors
- 👤 Aleksander I. Braginski
- 👤 Alan T. Male
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:41
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0128; H10N60/0241; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/80; Y10S505/812; Y10S505/813; Y10S505/825; Y10S505/917; Y10S505/928; Y10S505/929; Y10S505/93; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12097
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
41 words
A superconducting composite wire comprising: a. an encapsulating sheath of ductile conducting metal; and b. encapsulating filaments of essentially contiguous submicron-particle superconducting powder, said superconducting powder containing a lubricant, said lubricant being less than 10% by volume of said superconducting powder.
Claim 2
Dependent Claim
41 words
A superconducting composite wire comprising: a. an encapsulating sheath of ductile conducting metal; and b. encapsulating filaments of essentially contiguous submicron-particle superconducting powder, said superconducting powder containing a lubricant, said lubricant being less than 10% by volume of said superconducting powder.
Claim 3
Dependent Claim
27 words
A superconducting composite wire of claim 1 wherein said encapsulating metal is selected from the group consisting of Cu, Al, Nb, Ta, Ag, Au and mixtures thereof.
Claim 4
Dependent Claim
60 words
A superconducting composite wire of claims 1 or 2 wherein said encapsulated superconducting powder is selected from the group consisting of Nb 3 Sn, Nb 3 Al, Nb 3 Ga, Nb 3 Ge, V 3 Si, V 3 Ga, their pseudobinaries such as Nb 3 (Al, Ge), Nb(N, C), NbC, and Chevrel phases such as PbMo 6 S 8 .
Claim 5
Dependent Claim
19 words
A superconducting composite wire of claim 1 wherein said submicron-particle superconducting powder comprises particle sizes less than 1000 Angstroms.
Claim 6
Dependent Claim
19 words
A superconducting composite wire of claim 1 wherein said submicron-particle superconducting powder comprises particle sizes of about 100 Angstroms.
Claim 7
Dependent Claim
18 words
A superconducting composite wire of claim 1 wherein said metal is Cu and said superconducting powder is NbC.
Claim 8
Dependent Claim
22 words
A superconducting composite wire of claims 1, 2, 4 or 6 wherein said encapsulated filaments have not been sintered or reaction annealed.
Claim 9
Dependent Claim
15 words
A superconducting composite wire of claim 3 wherein said encapsulated filaments have not been sintered.
Claim 10
Dependent Claim
58 words
A superconducting composite wire comprising: a. an encapsulating sheath of ductile conducting metal; and b. encapsulating filaments of essentially contiguous submicron-particle superconducting powder; wherein said submicron-particle superconducting powder is either coated with a layer of lubricant or mixed with a lubricant powder of comparable particle size, said lubricant being less than 10% by volume of said superconducting powder.
Claim 11
Dependent Claim
58 words
A superconducting composite wire comprising: a. an encapsulating sheath of ductile conducting metal; and b. encapsulating filaments of essentially contiguous submicron-particle superconducting powder; wherein said submicron-particle superconducting powder is either coated with a layer of lubricant or mixed with a lubricant powder of comparable particle size, said lubricant being less than 10% by volume of said superconducting powder.
Claim 12
Dependent Claim
50 words
A superconducting composite wire comprising: a. an encapsulating sheath of ductile conducting metal; and b. an encapsulated essentially contiguous core of submicron-particle superconducting powder, wherein said submicron-particle superconducting powder has a generally spherical shape and containing a lubricant, said lubricant being less than 10% by volume of said superconducting powder.
Claim 13
Dependent Claim
50 words
A superconducting composite wire comprising: a. an encapsulating sheath of ductile conducting metal; and b. an encapsulated essentially contiguous core of submicron-particle superconducting powder, wherein said submicron-particle superconducting powder has a generally spherical shape and containing a lubricant, said lubricant being less than 10% by volume of said superconducting powder.
Claim 14
Dependent Claim
76 words
A flexible superconducting composite wire utilizing brittle superconducting material, said wire comprising: a. an encapsulating sheath of ductile conducting metal; and b. an encapsulated core consisting of essentially contiguous, discrete submicron superconducting particles and containing lubricant, said lubricant being less than 10% by volume, whereby said particles are capable of slipping relative to each other and still have spacing between particles of generally less than the coherence length to provide a ductile and flexible superconducting wire.
Claim 15
Dependent Claim
76 words
A flexible superconducting composite wire utilizing brittle superconducting material, said wire comprising: a. an encapsulating sheath of ductile conducting metal; and b. an encapsulated core consisting of essentially contiguous, discrete submicron superconducting particles and containing lubricant, said lubricant being less than 10% by volume, whereby said particles are capable of slipping relative to each other and still have spacing between particles of generally less than the coherence length to provide a ductile and flexible superconducting wire.
Claim 16
Dependent Claim
15 words
The wire of claim 11 wherein said lubricant is less than about 1% by volume.
References Cited (Backward Citations)
US3124455A
Cited
US2888740A
Cited
US3496622A
Cited
US3284562A
Cited
US3471925A
Cited
US3796553A
Cited
US3817746A
Cited
US4127700A
Cited
US4050147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |