JPH0713282B2 - Method for manufacturing stabilizer for composite superconducting conductor - Google Patents
Method for manufacturing stabilizer for composite superconducting conductorInfo
- Publication number
- JPH0713282B2 JPH0713282B2 JP60069761A JP6976185A JPH0713282B2 JP H0713282 B2 JPH0713282 B2 JP H0713282B2 JP 60069761 A JP60069761 A JP 60069761A JP 6976185 A JP6976185 A JP 6976185A JP H0713282 B2 JPH0713282 B2 JP H0713282B2
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- purity
- superconducting conductor
- stabilizer
- conductor
- 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
- 239000004020 conductor Substances 0.000 title claims description 15
- 239000002131 composite material Substances 0.000 title claims description 10
- 239000003381 stabilizer Substances 0.000 title claims description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 238000000034 method Methods 0.000 title description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 19
- 239000000463 material Substances 0.000 description 14
- 230000000087 stabilizing effect Effects 0.000 description 9
- 239000010949 copper Substances 0.000 description 7
- 229910020012 Nb—Ti Inorganic materials 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910020220 Pb—Sn Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006023 eutectic alloy Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
Description
【発明の詳細な説明】 〈産業上の利用分野〉 この発明は複合超電導導体用安定化材の製造方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a method for producing a stabilizer for a composite superconducting conductor.
〈従来の技術とその問題点〉 核融合、エネルギー貯蔵などに応用する大型超電導マグ
ネットでは、マグネット保護の観点からインダクタンス
を小さくして高磁界を発生させるため、大容量導体を用
いることが不可欠である。<Conventional technology and its problems> In a large-scale superconducting magnet applied to nuclear fusion, energy storage, etc., it is essential to use a large-capacity conductor in order to reduce the inductance and generate a high magnetic field from the viewpoint of magnet protection. .
また、これらの大型マグネットの超電導安定化の設計
は、導体の一部に常電導転移が起った場合の発熱（Ｇ）
より冷却熱量（Ｑ）を大きくし、常電導部が伝播するこ
となく超電導状態に復帰するようにするクライオスタテ
ィックな安定化法によっている。In addition, the design for stabilizing superconductivity of these large magnets is designed to generate heat (G) when a part of the conductor undergoes normal conduction transition.
This is based on a cryostatic stabilization method in which the amount of cooling heat (Q) is further increased and the normal-conducting portion returns to the superconducting state without propagating.
上記の発熱（Ｇ）および冷却熱量（Ｑ）は次式により示
される。The heat generation (G) and the cooling heat quantity (Q) are expressed by the following equations.
即ち、Ｇ＝ρ/S・I2 ……（１） Ｑ＝ｐ・ｈ ……（２） 但し、I:通電電流値 ρ：安定化材の抵抗率 S:安定化材の断面積 p:冷却表面積 h:導体とヘリウム間の熱流束 である。That is, G = ρ / S · I 2 (1) Q = p · h (2) where I: current value ρ: resistivity of stabilizing material S: cross-sectional area of stabilizing material p: Cooling surface area h: Heat flux between conductor and helium.
この式から超電導導体としては、ρを小さくし、ｓ、
ｐ、ｈを大きくすることが必要である。From this formula, for a superconducting conductor, ρ is made small, s,
It is necessary to increase p and h.
これらのうち、ｐ、ｈは導体寸法、形状により、ほぼ決
められてしまい、またＳを大きくすると、マグネットが
大型化し、コスト的に問題である。Of these, p and h are almost determined by the size and shape of the conductor, and when S is increased, the magnet becomes larger, which is a cost problem.
従って、超電導導体の安定化材としては抵抗率ρが小さ
いことが必要で、通常は純銅が用いられる。Therefore, it is necessary that the resistivity ρ is small as a stabilizer for the superconducting conductor, and pure copper is usually used.
しかし、安定化材としてCuを用いた場合は、特に高磁界
での安定性が悪い。そしてこの安定性を十分にするには
多量のCuが必要となり、電流密度が減少し、マグネット
寸法が増大する。However, when Cu is used as the stabilizing material, the stability is particularly poor in a high magnetic field. Then, a large amount of Cu is required to achieve this stability, the current density is reduced, and the magnet size is increased.
これはCuの電気抵抗は磁気抵抗効果により磁界と共に著
しく増加するため、電気抵抗と共に熱電導が低下するた
めである。This is because the electric resistance of Cu increases remarkably with the magnetic field due to the magnetoresistive effect, and the thermal conductivity decreases with the electric resistance.
要するに、Cuは磁界の増加に伴なう抵抗率の増加、即ち
磁気抵抗効果が大きいことが欠点であり、このことから
磁気抵抗効果の小さい高純度Alを安定化材として用いる
ことが望まれている。しかしながら高純度Alは機械強
度、特に耐疲労強度が小さい欠点があり、繰返し電磁力
が導体に加えられるパルスマグネットでは大きな問題と
なるのである。In short, Cu has the drawback that the resistivity increases with an increase in the magnetic field, that is, the magnetoresistive effect is large, and therefore it is desired to use high-purity Al with a small magnetoresistive effect as a stabilizer. There is. However, high-purity Al has a defect that mechanical strength, particularly fatigue resistance, is small, which is a serious problem in a pulse magnet in which a repetitive electromagnetic force is applied to a conductor.
〈問題点を解決するための手段〉 この発明は、上記した従来の欠陥に鑑み、これを解消す
べく検討結果、得られたものである。<Means for Solving the Problems> The present invention has been achieved as a result of studies to solve the above-mentioned conventional defects in view of the problems.
即ち、この発明は純度99.9重量％以上の純Al棒をMgおよ
びSiを夫々0.2〜0.6重量％含有したAl合金で被覆し、最
終形状に成形後150℃以上、190℃以下で１時間以上、70
時間以下にて熱処理することを特徴とする複合超電導導
体用安定化材の製造方法を提供するものである。That is, according to the present invention, a pure Al rod having a purity of 99.9% by weight or more is coated with an Al alloy containing 0.2 to 0.6% by weight of Mg and Si, respectively, and molded into a final shape at 150 ° C or higher and 190 ° C or lower for 1 hour or more, 70
The present invention provides a method for producing a stabilizing material for a composite superconducting conductor, which is characterized by performing heat treatment for not more than a time.
〈作用〉 以下、この発明を図面を参照しつつ説明する。<Operation> Hereinafter, the present invention will be described with reference to the drawings.
第１図において、１はMg、Siを夫々0.2〜0.6％含有した
Al合金層２を被覆した高純度Alである。In FIG. 1, 1 contains 0.2 to 0.6% of Mg and Si, respectively.
It is high-purity Al that covers the Al alloy layer 2.
この発明は第１図に断面構造を示すように、集合導体に
Al合金被覆したAl材を安定化材として用いるものであ
る。ここでAl合金被覆高純度AlはAl合金管中に高純度Al
棒を入れて作製した複合ビレットの押出し、あるいはAl
合金パイプと高純度Al棒の複合伸線によって作製され
る。As shown in the sectional structure of FIG.
The Al material coated with an Al alloy is used as a stabilizing material. Here, high-purity Al coated with Al alloy means high-purity Al in the Al alloy tube.
Extrusion of composite billet made by inserting rod, or Al
It is made by composite drawing of alloy pipe and high-purity Al rod.
なお、第１図における３はNb−TiまたはNb3Sn極細多芯
超電導線である。Incidentally, 3 is a Nb-Ti or Nb 3 Sn multifilamentary superconducting wire in the first view.
この発明において、高純度Al棒の外周を被覆するAl合金
層の素材となるAl合金にはMg、Siの夫々0.2〜0.6％を含
有させたことが特徴であるが、これは電気抵抗を低下さ
せることなく、Alの強度を増加させるためである。In the present invention, the Al alloy that is the material of the Al alloy layer that coats the outer periphery of the high-purity Al rod is characterized by containing 0.2% to 0.6% of Mg and Si, respectively. This is to increase the strength of Al without causing it.
このMg、SiのAl合金中への含有量を0.2〜0.6％とするの
は、0.2％以下では機械的強度を増加させるのに不十分
であること、また0.6％以上では電気抵抗の大きな増加
を生じること、さらに加工性を劣化させるので好ましく
ないためである。The content of Mg and Si in the Al alloy of 0.2 to 0.6% is insufficient to increase the mechanical strength at 0.2% or less, and a large increase in electrical resistance at 0.6% or more. This is because it is not preferable because it causes the deterioration of workability.
また、この発明による安定化材の他の一例を示すと、第
２図のようにNb−Ti極細多芯超電導線からなるモノリシ
ック導体４の外周を高純度Al1、さらにその最外周をAl
合金層２で被覆したものである。これは複合ビレットの
押出し、またはAl合金パイプ、高純度Alパイプ、Nb−Ti
超電導導体の複合伸線によって作製することもできる。As another example of the stabilizing material according to the present invention, as shown in FIG. 2, the outer periphery of the monolithic conductor 4 made of Nb-Ti ultra-fine multi-core superconducting wire is made of high purity Al1, and the outermost periphery thereof is made of Al.
It is coated with the alloy layer 2. This is extruded composite billet, or Al alloy pipe, high purity Al pipe, Nb-Ti
It can also be produced by composite drawing of a superconducting conductor.
〈実施例〉 以下、この発明を実施例により説明する。<Examples> Hereinafter, the present invention will be described with reference to Examples.
下記の第１表に示した組成のAl合金よりなる外径70mmの
管の中に99.92％のAl棒を入れ、上、下に同じAl合金か
らなる蓋をし、真空室中でAl合金管内部を真空引きした
後、蓋を電子ビーム溶接して複合ビレットを作製した。Put 99.92% Al rod in a 70 mm outer diameter tube made of an Al alloy having the composition shown in Table 1 below, cover the upper and lower lids with the same Al alloy, and put the Al alloy tube in a vacuum chamber. After vacuuming the inside, the lid was electron beam welded to produce a composite billet.
これを静水圧押出機を用いて30mmψに押出しした。ここ
でAl合金の被覆率は15％である。This was extruded to 30 mmφ using a hydrostatic extruder. Here, the coverage of the Al alloy is 15%.
次に押出材を伸線および圧延し、３×16mm2の板を２
枚、５×10mm2の板を１枚作製し、第１表に示す条件で
熱処理した。Next, the extruded material is drawn and rolled, and a 3 × 16 mm 2 plate is cut into two pieces.
One sheet of 5 × 10 mm 2 was prepared and heat-treated under the conditions shown in Table 1.
これらの板材と、別途作製した５×5mm2のNb−Ti極細多
芯超電導線を半田（Pb−Sn共晶合金）で接着合体して大
容量の超電導導体を得た。A large-capacity superconducting conductor was obtained by adhering these plate materials and a separately prepared 5 × 5 mm 2 Nb-Ti ultrafine multicore superconducting wire with solder (Pb-Sn eutectic alloy).
なお、Al合金層表面には半田接着可能とするため、予め
Snを電気めっきした。In order to enable solder bonding on the surface of the Al alloy layer,
Sn was electroplated.
一方、この発明による8mm径のAl合金被覆高純度Al棒を
用い、回転曲げ疲労試験により耐疲労強度を調べた。ま
た4.2Kにおいて電気抵抗率を測定した。その結果は第１
表に示した。On the other hand, the fatigue resistance strength was examined by a rotating bending fatigue test using an Al alloy-coated high-purity Al rod having a diameter of 8 mm according to the present invention. The electrical resistivity was measured at 4.2K. The result is first
Shown in the table.
なお、比較のために測定した99.92％Al棒に比べ、電気
抵抗率は減少し、かつ耐疲労強度も著しく改善されてい
ることが認められた。It was found that the electrical resistivity was reduced and the fatigue strength was remarkably improved as compared with the 99.92% Al bar measured for comparison.
〈発明の効果〉 以上のように、この発明の安定化材の製法は超電導複合
導体用の安定化材としてMg、Siを夫々0.2〜0.6％含有し
たAl合金で被覆した高純度Al棒を用いるものであり、通
常、超電導の安定化材として用いられているCuに比べ、
超電導を安定化させる力が大きい。 <Effects of the Invention> As described above, the manufacturing method of the stabilizer of the present invention uses a high-purity Al rod coated with an Al alloy containing 0.2 to 0.6% of Mg and Si, respectively, as the stabilizer for the superconducting composite conductor. It is usually compared with Cu used as a stabilizer for superconductivity,
It has a great power to stabilize superconductivity.
これは極低温で、特に高磁界において、Cuに比べ電気抵
抗率の小さいAlを用いているためであるとともに、最終
形状に成形後、熱処理することにより高純度Alの電気抵
抗が減少するためである。This is because at low temperatures, especially in high magnetic fields, Al, which has a smaller electrical resistivity than Cu, is used, and because the electrical resistance of high-purity Al decreases by heat treatment after forming it into the final shape. is there.
また、通常安定化材における疲労クラックは、材料の表
面で発生し、内部に伝播する。Further, the fatigue crack in the stabilizing material usually occurs on the surface of the material and propagates inside.
この発明は材料外周をMg、Siを夫々0.2〜0.6％添加した
Al合金で被覆したため耐疲労強度を向上させることがで
きたのである。In this invention, 0.2 to 0.6% of Mg and Si are added to the outer periphery of the material.
Since it was coated with an Al alloy, the fatigue strength could be improved.
第１図はこの発明の方法よりなる安定化材の一例を示す
断面構造図、第２図はこの発明の他の一例を示す平面図
である。 １……高純度Al、２……Al合金被覆層 ３……Nb−TiまたはNb3Sn極細多芯超電導層FIG. 1 is a cross-sectional structural view showing an example of a stabilizing material formed by the method of the present invention, and FIG. 2 is a plan view showing another example of the present invention. 1 ... High-purity Al, 2 ... Al alloy coating layer 3 ... Nb-Ti or Nb 3 Sn extra fine multi-core superconducting layer
Claims (1)
を夫々0.2〜0.6重量％含有したAl合金で被覆し、最終形
状に成形後150℃以上、190℃以下で１時間以上、70時間
以下熱処理することを特徴とする複合超電導導体用安定
化材の製造方法。1. A pure Al rod having a purity of 99.9% by weight or more is replaced with Mg and Si.
Of a stabilizer for a composite superconducting conductor, characterized in that each of them is coated with an Al alloy containing 0.2 to 0.6% by weight and heat-treated at a temperature of 150 ° C or higher and 190 ° C or lower for 1 hour or more and 70 hours or less after forming the final shape. Production method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60069761A JPH0713282B2 (en) | 1985-04-02 | 1985-04-02 | Method for manufacturing stabilizer for composite superconducting conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60069761A JPH0713282B2 (en) | 1985-04-02 | 1985-04-02 | Method for manufacturing stabilizer for composite superconducting conductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61231143A JPS61231143A (en) | 1986-10-15 |
| JPH0713282B2 true JPH0713282B2 (en) | 1995-02-15 |
Family
ID=13412104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60069761A Expired - Lifetime JPH0713282B2 (en) | 1985-04-02 | 1985-04-02 | Method for manufacturing stabilizer for composite superconducting conductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0713282B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5266416A (en) * | 1991-02-20 | 1993-11-30 | The Furukawa Electric Co., Ltd. | Aluminum-stabilized superconducting wire |
| JP2727874B2 (en) * | 1992-06-30 | 1998-03-18 | 株式会社日立製作所 | Superconducting wire and composite superconducting conductor |
-
1985
- 1985-04-02 JP JP60069761A patent/JPH0713282B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61231143A (en) | 1986-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1526586B1 (en) | Manufacturing method for superconducting wire | |
| JP4481584B2 (en) | Composite sheath MgB2 superconducting wire and method for manufacturing the same | |
| JP4055375B2 (en) | Superconducting wire, manufacturing method thereof and superconducting magnet using the same | |
| WO1990013919A1 (en) | Production of high temperature superconducting materials | |
| US20040121915A1 (en) | Superconducting wire rod and method of producing the same | |
| JPS6150136B2 (en) | ||
| US3817746A (en) | Ductile superconducting alloys | |
| EP3961658B1 (en) | Blank for producing a long nb3 sn-based superconducting wire | |
| JPH0713282B2 (en) | Method for manufacturing stabilizer for composite superconducting conductor | |
| JPH063689B2 (en) | Stabilizer for superconducting composite conductor | |
| US5628835A (en) | Nb3 Al Group superconductor containing ultrafine Nb2 Al particles | |
| JPH0568805B2 (en) | ||
| JPH10275641A (en) | Connection structure between superconductor and metal terminal for AC current | |
| JPH0251807A (en) | Manufacture of nb3al superconducting wire rod with extremely fine multiplex structure | |
| Kreilick et al. | The design and fabrication of multifilamentary NbTi composites utilizing various matrix materials | |
| JPS63285155A (en) | Oxide-based superconducting material and its manufacturing method | |
| JP3046828B2 (en) | Nb Lower 3 Method for Manufacturing Sn Composite Superconductor | |
| Yamada et al. | Performance test of Bi-2212 HTS current leads prepared by the diffusion process | |
| JP2007258112A (en) | Method for producing Nb-based compound superconducting wire | |
| Tachikawa et al. | Effects of the germanium addition to the matrix of bronze-processed Nb3Sn wires | |
| JPH0316202A (en) | Conductor for current lead | |
| JPH0644420B2 (en) | Copper-stabilized Nb-Ti superconducting wire | |
| JPH0317332B2 (en) | ||
| Foner et al. | Improved Performance Powder Metallurgy and In Situ Processed Multifilamentary Superconductors | |
| JPH0888117A (en) | Current lead for refrigerator-cooled superconducting coil |