CA2601517A1 - Method for transiting a metal conductor into a superconducting state - Google Patents
Method for transiting a metal conductor into a superconducting state Download PDFInfo
- Publication number
- CA2601517A1 CA2601517A1 CA002601517A CA2601517A CA2601517A1 CA 2601517 A1 CA2601517 A1 CA 2601517A1 CA 002601517 A CA002601517 A CA 002601517A CA 2601517 A CA2601517 A CA 2601517A CA 2601517 A1 CA2601517 A1 CA 2601517A1
- Authority
- CA
- Canada
- Prior art keywords
- spiral
- conductor
- carried out
- metal
- dislocation density
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
Landscapes
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Wire Processing (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The invention relates to engineering, in particular to superconducting materials and to methods for processing said materials. The inventive method for transiting a metal conductor into a superconducting state consists in plastically deforming a conductor by a wire single-spiral winding or by coiling wires into a spiral, in bringing a dislocation density to a value equal to or greater than 1.108 cm-2 by deformation and in successively increasing said dislocation density of the conductor to a value ranging from 1.1012-1.1015 cm-2. A metal conductor can be prewound around the longitudinal axis thereof and afterwards coiled into a single-spiral. The winding of two wires into a spiral is carried out at an angle of turn inclination to the longitudinal axis thereof ranging from 20 to 58~. Each wire can be also prewound around the axis thereof. Heat-treatment is carried out by means of any known method at a temperature which is less than a metal melting point.
Said heat treatment can be carried out simultaneously with a current passage through the spiral. Said invention makes it possible to obtain a such dislocation density in a metal conductor which is required for the transition thereof into a superconducting state and which can not be attained by plastic deformation.
Said heat treatment can be carried out simultaneously with a current passage through the spiral. Said invention makes it possible to obtain a such dislocation density in a metal conductor which is required for the transition thereof into a superconducting state and which can not be attained by plastic deformation.
Claims (6)
1. A method for transiting a metal conductor into a superconducting state, the method comprising plastically deforming the conductor by winding a wire into a single spiral or by twisting two wires into a spiral, followed by passing electrical current through the conductor, characterized in that a dislocation density in the conductor is brought up to a value of not less than 1.cndot.10 -8 cm-2 by the deformation, and a further increase in the dislocation density in the conductor is carried out by heat treatment up to a value of 1.cndot.10 12 - 1.cndot.10 15 cm-2.
2. The method according to claim 1, characterized in that the metal conductor is pre-twisted around its longitudinal axis and then is wound into a single spiral.
3. The method according to claim 1, characterized in that the plastic deformation of the conductor is carried out by twisting two wires into a spiral at an inclination angle of spiral turns to the longitudinal axis of the spiral in the range of 20 -58°.
4. The method according to claim 1, 3, characterized in that each of the two metal conductors is pre-twisted around a longitudinal axis thereof, and then the two conductors are twisted into a spiral.
5. The method according to any one of claims 1 - 4, characterized in that the heat treatment is carried out at a temperature less than a melting temperature of the metal by any known techniques.
6. The method according to any one of claims 1 - 5, characterized in that the heat treatment is carried out simultaneously with the passage of electric current.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/RU2004/000097 WO2005087967A1 (en) | 2004-03-15 | 2004-03-15 | Method for transiting a metal conductor into a superconducting state |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2601517A1 true CA2601517A1 (en) | 2005-09-22 |
| CA2601517C CA2601517C (en) | 2011-02-15 |
Family
ID=34975604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2601517A Expired - Fee Related CA2601517C (en) | 2004-03-15 | 2004-03-15 | Method for transiting a metal conductor into a superconducting state |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2601517C (en) |
| WO (1) | WO2005087967A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1339638C (en) * | 1987-03-30 | 1998-01-27 | Sumitomo Electric Industries, Ltd. | Method of manufacturing superconducting wire |
| SU1826744A1 (en) * | 1988-12-09 | 1996-04-10 | Институт Неорганической Химии Со Ан Ссср | Method for generation of abnormal conductance at high temperature |
| JP2861545B2 (en) * | 1991-11-12 | 1999-02-24 | 住友電気工業株式会社 | Method for producing Nb-based compound superconducting coil |
| RU2061084C1 (en) * | 1992-07-10 | 1996-05-27 | Геннадий Александрович Марков | Method of formation of anamalous conductance |
| RU2233349C2 (en) * | 2002-08-08 | 2004-07-27 | Марков Геннадий Александрович | Method of converting metal conductor into superconducting state |
-
2004
- 2004-03-15 CA CA2601517A patent/CA2601517C/en not_active Expired - Fee Related
- 2004-03-15 WO PCT/RU2004/000097 patent/WO2005087967A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CA2601517C (en) | 2011-02-15 |
| WO2005087967A1 (en) | 2005-09-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20150316 |
|
| MKLA | Lapsed |
Effective date: 20150316 |