US3256118A - Process for the manufacture of a supraconductive wire - Google Patents
Process for the manufacture of a supraconductive wire Download PDFInfo
- Publication number
- US3256118A US3256118A US294200A US29420063A US3256118A US 3256118 A US3256118 A US 3256118A US 294200 A US294200 A US 294200A US 29420063 A US29420063 A US 29420063A US 3256118 A US3256118 A US 3256118A
- Authority
- US
- United States
- Prior art keywords
- wire
- supraconductive
- manufacture
- tube
- intermetallic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 229910000765 intermetallic Inorganic materials 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000010955 niobium Substances 0.000 description 16
- 229910052758 niobium Inorganic materials 0.000 description 10
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 9
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 8
- 229910052718 tin Inorganic materials 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000000137 annealing Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F3/26—Impregnating
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S505/00—Superconductor technology: apparatus, material, process
- Y10S505/80—Material per se process of making same
- Y10S505/815—Process of making per se
- Y10S505/818—Coating
- Y10S505/821—Wire
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S505/00—Superconductor technology: apparatus, material, process
- Y10S505/825—Apparatus per se, device per se, or process of making or operating same
- Y10S505/917—Mechanically manufacturing superconductor
- Y10S505/918—Mechanically manufacturing superconductor with metallurgical heat treating
- Y10S505/919—Reactive formation of superconducting intermetallic compound
- Y10S505/921—Metal working prior to treating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49014—Superconductor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4998—Combined manufacture including applying or shaping of fluent material
- Y10T29/49993—Filling of opening
Definitions
- This invention relates to a process for the manufacture of a supraconductive wire, particularly of a wire of intermetallic compounds.
- supraconductivity of metallic materials ie the sudden drop in electric resistance in the range of low temperatures, particularly near absolute zero, is not limited to specific pure metals or to alloys of two supraconductors. Alloys of a normal conductive material and a supraconductive material and alloys of two norinal conductive materials show supraconductivity as Wel Intermetallic compounds gained particular importance as supraconductors since their transition temperatures markedly exceed those of the pure components.
- Known intermetallic compounds having supraconductivity are chiefly those of the metals niobium, vanadium and tantalum, e.g. the compounds Nb Sn, Nb Al, Nb ln and Nb Ga, V Si, V 62. and V Sn as well as Ta Sn. In particular, these supraconductors are widely used for production of strong magnetic fields with both direct current and alternating current.
- the present invention is based on the problem to simplify the manufacture of supraconductive wires of intermetallic compounds, which manufacture is faced with great difiiculties due to the brittleness of these compounds, while simultaneously bringing about the filament structure which is essential forthe use of supraconductors.
- the wire is annealed at temperatures of between 970 and 1400 C. certain number of filaments is developed in this prior art process, it has been found that a substantial increase in view of the properties of the supraconductive Wire is desirable.
- a surprising solution to the problem on which the invention is based is the manufacture of a supraconductive wire, particularly of intermetallic compounds, by density filling a tube made of one of the components of the intermetallic phase with a wire bundle of the same material, filling the voids with the second component of the intermetallicphase in fused state, drawing down the shaped body while cold to the diameter desired using preferably several steps, winding it, e.g. into a coil, for final shaping and finally annealing it. This will give the wire the supraconductive characteristics.
- the particular advantage of this process consists in While a that the wire bundle consisting of the one component of connection with the manufacture of a supraconductive wire consisting of the intermetallic phase Nb Sn with the ratio of tube and wire to the amount of tin filling the voids being chosen in accordance with the resultant compound Nb Sn.
- Wires of other intermetallic compounds may be manufactured in an analogous manner so that this example does not constitute a limitation of the subject matter of this application.
- the material for the tube and the wire bundle may be vanadium and the second component of the intermetallic phase may be gallium.
- the manufacture of a wire of an intermetallic compound or alloy consisting of more than two components is also possible by the process of the invention.
- a niobium tube of 50 cm. in length and 10 mm. in outside diameter and being pickled in its interior is electroplated in its interior with a tin layer of 15 microns thickness.
- Niobium wires each having a diameter of 0.5 mm. are tin-plated by the dipping process, combined into a bundle and drawn through a wire die thereby adapting the diameter of the total bundle to the inside diameter of the niobium tube.
- the wire bundle After the wire bundle has been drawn into the niobium tube, the latter is purged with inert gas, dipped into fused pure tin and the molten tin is sucked into the tube with the use of vacuum.
- the tube is then left for some time in the molten tin and thereafter V the tube is cold-drawn in several steps to the wire diameter desired of, for example, 0.1 mm.
- the 'wire is then wound into a coil and annealed for several hours at temperatures of between about 900 and 1200 C.
- the wires of intermetallic compounds manufactured by the process of the invention have considerably improved properties as compared with wire of Nb Sn manufactured by the prior art process and result in substantial advantages when used for the production of high magnetic fields, particularly for the control of electron and ionic currents.
- a process for the manufacture of a supraconductive wire, particularly of a wire consisting of intermetallic compounds which comprises densely filling a tube made of the one component of the supraconductive intermetallic phase with a wire bundle preferably consisting of the same material, filling the voids with the second component of the intermetallic phase in molten state, drawing down the shaped body to the diameter desired and annealing it after final shaping.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Electric Clocks (AREA)
- Metal Extraction Processes (AREA)
- Coating With Molten Metal (AREA)
Description
United States Patent Office Patented June 14, 1966 7 Claims. (cl. 148-2) This invention relates to a process for the manufacture of a supraconductive wire, particularly of a wire of intermetallic compounds.
As is known, supraconductivity of metallic materials, ie the sudden drop in electric resistance in the range of low temperatures, particularly near absolute zero, is not limited to specific pure metals or to alloys of two supraconductors. Alloys of a normal conductive material and a supraconductive material and alloys of two norinal conductive materials show supraconductivity as Wel Intermetallic compounds gained particular importance as supraconductors since their transition temperatures markedly exceed those of the pure components. Known intermetallic compounds having supraconductivity are chiefly those of the metals niobium, vanadium and tantalum, e.g. the compounds Nb Sn, Nb Al, Nb ln and Nb Ga, V Si, V 62. and V Sn as well as Ta Sn. In particular, these supraconductors are widely used for production of strong magnetic fields with both direct current and alternating current.
The present invention is based on the problem to simplify the manufacture of supraconductive wires of intermetallic compounds, which manufacture is faced with great difiiculties due to the brittleness of these compounds, while simultaneously bringing about the filament structure which is essential forthe use of supraconductors.
It is already known to manufacture wires of the intermetallic compound Nb Sn by filling a tube of niobium.
either with a mixture of powdered Nb Sn and an excess of tin powder or with a still reactive mixture of tin and niobium powders, sealing the tube with a niobium plug and reducing it to the Wire diameter desired by mechanical Working. Following this, the wire is annealed at temperatures of between 970 and 1400 C. certain number of filaments is developed in this prior art process, it has been found that a substantial increase in view of the properties of the supraconductive Wire is desirable.
A surprising solution to the problem on which the invention is based is the manufacture of a supraconductive wire, particularly of intermetallic compounds, by density filling a tube made of one of the components of the intermetallic phase with a wire bundle of the same material, filling the voids with the second component of the intermetallicphase in fused state, drawing down the shaped body while cold to the diameter desired using preferably several steps, winding it, e.g. into a coil, for final shaping and finally annealing it. This will give the wire the supraconductive characteristics.
The particular advantage of this process consists in While a that the wire bundle consisting of the one component of connection with the manufacture of a supraconductive wire consisting of the intermetallic phase Nb Sn with the ratio of tube and wire to the amount of tin filling the voids being chosen in accordance with the resultant compound Nb Sn. Wires of other intermetallic compounds may be manufactured in an analogous manner so that this example does not constitute a limitation of the subject matter of this application. For example, the material for the tube and the wire bundle may be vanadium and the second component of the intermetallic phase may be gallium. Moreover, it is to be understood that the manufacture of a wire of an intermetallic compound or alloy consisting of more than two components is also possible by the process of the invention.
A niobium tube of 50 cm. in length and 10 mm. in outside diameter and being pickled in its interior is electroplated in its interior with a tin layer of 15 microns thickness. Niobium wires each having a diameter of 0.5 mm. are tin-plated by the dipping process, combined into a bundle and drawn through a wire die thereby adapting the diameter of the total bundle to the inside diameter of the niobium tube. After the wire bundle has been drawn into the niobium tube, the latter is purged with inert gas, dipped into fused pure tin and the molten tin is sucked into the tube with the use of vacuum. Desirably the tube is then left for some time in the molten tin and thereafter V the tube is cold-drawn in several steps to the wire diameter desired of, for example, 0.1 mm. The 'wire is then wound into a coil and annealed for several hours at temperatures of between about 900 and 1200 C.
The wires of intermetallic compounds manufactured by the process of the invention have considerably improved properties as compared with wire of Nb Sn manufactured by the prior art process and result in substantial advantages when used for the production of high magnetic fields, particularly for the control of electron and ionic currents.
What is claimed is:
1. A process for the manufacture of a supraconductive wire, particularly of a wire consisting of intermetallic compounds, which comprises densely filling a tube made of the one component of the supraconductive intermetallic phase with a wire bundle preferably consisting of the same material, filling the voids with the second component of the intermetallic phase in molten state, drawing down the shaped body to the diameter desired and annealing it after final shaping.
2. The process of claim 1, wherein said filling of the voids with said second component of the intermetallic phase is effected with the application of vacuum.
3. The process of claim 1, wherein said drawing-down to the final diameter is effected cold in several steps.
4. The process of claim 1, wherein said wire is wound into a coil before annealing.
5. The process of claim 1, wherein the material of the tube and wire bundle is niobium.
6. The process of claim 1, wherein said second component of the intermetallic phase is tin.
7. The process of claim 1, wherein said annealing is eifected for several hours at a temperature between about 900 and 1200 C.
References Cited by the Examiner UNITED STATES PATENTS 3/1964 Buehler et a1. 174 X 12/1964 Wong 75-528 X
Claims (1)
1. A PROCESS FOR THE MANUFACTURE OF A SUPRACONDUCTIVE WIRE, PARTICULARLY OF A WIRE CONSISTING OF INTERMETALLIC COMPOUNDS, WHICH COMPRISES DENSELY FILLING A TUBE MADE OF THE ONE COMPONENT OF THE SUPRACONDUCTIVE INTERMETALLIC PHASE WITH A WIRE BUNDLE PREFERABLY CONSISTING OF THE SAME MATERIAL, FILLING THE VOIDS WITH THE SECOND COMPONENT OF THE INERMETALLIC PHASE IN MOLTEN STATE, DRAWING DOWN THE SHAPED BODY TO THE DIAMETER DESIRED AND AN NEALING IT AFTER FINAL SHAPING.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEH48449A DE1203965B (en) | 1963-03-06 | 1963-03-06 | Method of manufacturing a superconducting wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3256118A true US3256118A (en) | 1966-06-14 |
Family
ID=7156712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US294200A Expired - Lifetime US3256118A (en) | 1963-03-06 | 1963-07-10 | Process for the manufacture of a supraconductive wire |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3256118A (en) |
| CH (1) | CH450567A (en) |
| DE (1) | DE1203965B (en) |
| FR (1) | FR1383451A (en) |
| GB (1) | GB1008132A (en) |
| NL (1) | NL6402106A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3407049A (en) * | 1965-05-17 | 1968-10-22 | Union Carbide Corp | Superconducting articles and method of manufacture |
| US3443304A (en) * | 1965-12-11 | 1969-05-13 | Siemens Ag | Method of producing superconductive tapes or bands |
| US3496622A (en) * | 1964-02-08 | 1970-02-24 | Philips Corp | Method of manufacturing superconductive nb3sn-wrapped wire |
| US3523822A (en) * | 1968-01-11 | 1970-08-11 | Union Carbide Corp | Method for producing a superconducting coating resistant to thermal growth |
| US3541680A (en) * | 1966-12-30 | 1970-11-24 | Philips Corp | Method of manufacturing superconducting material |
| US3544316A (en) * | 1968-03-14 | 1970-12-01 | Rca Corp | Superconductors |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL171945C (en) * | 1973-04-09 | 1983-06-01 | Stichting Reactor Centrum | METHOD FOR MANUFACTURING A SUPER CONDUCTOR IN THE FORM OF A MONO OR MULTIFILAMENT WIRE |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3124455A (en) * | 1964-03-10 | Fabrication of n | ||
| US3162943A (en) * | 1961-07-27 | 1964-12-29 | Wah Chang Corp | Method of making wire of superconductive materials |
-
1963
- 1963-03-06 DE DEH48449A patent/DE1203965B/en active Pending
- 1963-07-10 US US294200A patent/US3256118A/en not_active Expired - Lifetime
-
1964
- 1964-02-25 FR FR964975A patent/FR1383451A/en not_active Expired
- 1964-03-03 NL NL6402106A patent/NL6402106A/xx unknown
- 1964-03-04 CH CH272364A patent/CH450567A/en unknown
- 1964-03-05 GB GB9395/64A patent/GB1008132A/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3124455A (en) * | 1964-03-10 | Fabrication of n | ||
| US3162943A (en) * | 1961-07-27 | 1964-12-29 | Wah Chang Corp | Method of making wire of superconductive materials |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3496622A (en) * | 1964-02-08 | 1970-02-24 | Philips Corp | Method of manufacturing superconductive nb3sn-wrapped wire |
| US3407049A (en) * | 1965-05-17 | 1968-10-22 | Union Carbide Corp | Superconducting articles and method of manufacture |
| US3443304A (en) * | 1965-12-11 | 1969-05-13 | Siemens Ag | Method of producing superconductive tapes or bands |
| US3541680A (en) * | 1966-12-30 | 1970-11-24 | Philips Corp | Method of manufacturing superconducting material |
| US3523822A (en) * | 1968-01-11 | 1970-08-11 | Union Carbide Corp | Method for producing a superconducting coating resistant to thermal growth |
| US3544316A (en) * | 1968-03-14 | 1970-12-01 | Rca Corp | Superconductors |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1203965B (en) | 1965-10-28 |
| GB1008132A (en) | 1965-10-27 |
| CH450567A (en) | 1968-01-31 |
| FR1383451A (en) | 1964-12-24 |
| NL6402106A (en) | 1964-09-07 |
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