US4435228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing NB3 SN superconducting wires
Assignee: National Institute for Materials Science
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Filing: 1983-02-15
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Granted: 1984-03-06
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Expires: 2003-02-15
Abstract
Abstract A process for producing a Nb3Sn superconducting wire, which comprises preparing a composite from a copper alloy material containing 0.1 to 5 atomic percent in total of at least one element of Group IV of the periodic table selected from titanium, zirconium and hafnium, a tin material and a niobium material, processing the composite into a wire, tape or tube, and heat-treating the processed composite at a temperature of 400 DEG to 900 DEG C. to form a Nb3Sn compound.
Inventors
- 👤 Kyoji Tachikawa
- 👤 Yuji Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:06
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0184; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/80; Y10S505/812; Y10S505/813; Y10S505/815; Y10S505/818; Y10S505/821; Y10S505/825; Y10S505/917; Y10S505/918; Y10S505/919; Y10S505/921
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
A process for producing a Nb 3 Sn superconducting wire, which comprises preparing a composite from a tin material, a niobium material and a matrix of copper alloy material which is tin-free containing 0.1 to 5 atomic percent in total of at least one element of Group IV of the periodic table selected from the group consisting of titanium, zirconium, and hafnium; processing the composite into a wire, tape or tube; and heat-treating the processed composite at a temperature of 400° to 900° C. to form a Nb 3 Sn compound.
Claim 2
Dependent Claim
91 words
A process for producing a Nb 3 Sn superconducting wire, which comprises preparing a composite from a tin material, a niobium material and a matrix of copper alloy material which is tin-free containing 0.1 to 5 atomic percent in total of at least one element of Group IV of the periodic table selected from the group consisting of titanium, zirconium, and hafnium; processing the composite into a wire, tape or tube; and heat-treating the processed composite at a temperature of 400° to 900° C. to form a Nb 3 Sn compound.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein the total amount of the Group IV element is 0.2 to 3 atomic percent.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein the copper alloy material contains 0.1 to 5 atomic percent of titanium.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein the copper alloy material contains 0.1 to 5 atomic percent of hafnium.
Claim 6
Dependent Claim
98 words
A process for producing a Nb 3 Sn superconducting wire, which comprises preparing a composite from a niobium material and a matrix of copper alloy material which is tin-free containing 0.1 to 5 atomic percent in total of at least one element of Group IV of the periodic table selected from the group consisting of titanium, zirconium and hafnium; processing the composite into a wire, tape or tube; coating the surface of the processed composite with tin, and thereafter heat-treating the coated composite at a temperature of 400° to 900° C. to form a Nb 3 Sn compound.
Claim 7
Dependent Claim
98 words
A process for producing a Nb 3 Sn superconducting wire, which comprises preparing a composite from a niobium material and a matrix of copper alloy material which is tin-free containing 0.1 to 5 atomic percent in total of at least one element of Group IV of the periodic table selected from the group consisting of titanium, zirconium and hafnium; processing the composite into a wire, tape or tube; coating the surface of the processed composite with tin, and thereafter heat-treating the coated composite at a temperature of 400° to 900° C. to form a Nb 3 Sn compound.
Claim 8
Dependent Claim
20 words
The process of claim 5 wherein the total amount of the Group IV element is 0.2 to 3 atomic percent.
Claim 9
Dependent Claim
18 words
The process of claim 5 wherein the copper alloy material contains 0.1 to 5 atomic percent of titanium.
Claim 10
Dependent Claim
18 words
The process of claim 5 wherein the copper alloy material contains 0.1 to 5 atomic percent of hafnium.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |