JPH063689B2 - Stabilizer for superconducting composite conductor - Google Patents
Stabilizer for superconducting composite conductorInfo
- Publication number
- JPH063689B2 JPH063689B2 JP60069762A JP6976285A JPH063689B2 JP H063689 B2 JPH063689 B2 JP H063689B2 JP 60069762 A JP60069762 A JP 60069762A JP 6976285 A JP6976285 A JP 6976285A JP H063689 B2 JPH063689 B2 JP H063689B2
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- stabilizer
- conductor
- purity
- superconducting
- 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 16
- 239000002131 composite material Substances 0.000 title claims description 11
- 239000003381 stabilizer Substances 0.000 title claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 15
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 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
- 230000007547 defect Effects 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
- 230000007423 decrease Effects 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
- 238000011835 investigation Methods 0.000 description 1
- 238000000034 method Methods 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
- Other Surface Treatments For Metallic Materials (AREA)
- 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動導体に用いる安定化材に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a stabilizer used in a composite super-electric 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、電気抵抗と共に熱伝導が低下する
ためである。This is because the electric resistance of Cu increases remarkably with the magnetic field due to the magnetoresistive effect, so that the heat conduction 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な高純度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 a drawback that the resistivity increases with the increase of the magnetic field, that is, the magnetoresistive effect is large, and therefore it is desired to use high-purity Al having 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
べく検討の結果、得られたものである。<Means for Solving the Problems> The present invention has been obtained as a result of investigations in order to solve the above-mentioned conventional defects.
即ち、この発明は純Al棒をMgおよびSiを夫々0.2〜0.6重
量％含有したAl合金で被覆したことを特徴とする超電導
複合導体用安定化材である。That is, the present invention is a stabilizer for a superconducting composite conductor, characterized in that a pure Al rod is coated with an Al alloy containing 0.2 to 0.6% by weight of Mg and Si, respectively.
〈作用〉 以下、この発明を図面を参照して詳細に説明する。<Operation> Hereinafter, the present invention will be described in detail 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極再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 pole re-multifilamentary superconducting wire is of high purity Al1, and the outermost periphery thereof is 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99.99％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 a 99.99% Al rod in a tube with an outer diameter of 70 mm 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枚作製した。The extruded material is then drawn and rolled, and a 3 x 16 mm 2 plate is
One sheet of 5 × 10 mm 2 was prepared.
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 ultra-fine multi-core 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 results are shown in Table 1.
なお、比較のために測定した99.99％Al棒に比べ、電気
抵抗率は若干の増加に止まるが、耐疲労強度は著しく改
善されていることが認められた。It was found that the fatigue resistance strength was remarkably improved, although the electrical resistivity only slightly increased as compared with the 99.99% Al bar measured for comparison.
〈発明の効果〉 以上のように、この発明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 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 a stabilizer for a superconducting composite conductor, and Compared to Cu, which is used as a stabilizing material for superconductivity, it has a greater ability 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。This is because Al, which has a smaller electrical resistivity than Cu, is used at extremely low temperatures, especially in a high magnetic field.
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 Al alloy, it was possible to improve the fatigue strength.
第１図はこの発明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 sectional structural view showing an example of a stabilizing material according to 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 (2)
含有したAl合金で被覆したことを特徴とする超電導複合
導体用安定化材。1. Pure Al rods containing 0.2 to 0.6% by weight of Mg and Si, respectively.
A stabilizer for a superconducting composite conductor, characterized by being coated with an Al alloy containing.
許請求の範囲第１項記載の超電導複合導体用安定化材。2. The stabilizing material for a superconducting composite conductor according to claim 1, wherein the purity of the pure Al rod is 99.9% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60069762A JPH063689B2 (en) | 1985-04-02 | 1985-04-02 | Stabilizer for superconducting composite conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60069762A JPH063689B2 (en) | 1985-04-02 | 1985-04-02 | Stabilizer for superconducting composite conductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61227306A JPS61227306A (en) | 1986-10-09 |
| JPH063689B2 true JPH063689B2 (en) | 1994-01-12 |
Family
ID=13412134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60069762A Expired - Lifetime JPH063689B2 (en) | 1985-04-02 | 1985-04-02 | Stabilizer for superconducting composite conductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH063689B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH069140B2 (en) * | 1988-06-08 | 1994-02-02 | 富士電気化学株式会社 | Spiral type non-aqueous electrolyte battery |
| US5266416A (en) * | 1991-02-20 | 1993-11-30 | The Furukawa Electric Co., Ltd. | Aluminum-stabilized superconducting wire |
-
1985
- 1985-04-02 JP JP60069762A patent/JPH063689B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61227306A (en) | 1986-10-09 |
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