JPS6222205B2 - - Google Patents
Info
- Publication number
- JPS6222205B2 JPS6222205B2 JP53050484A JP5048478A JPS6222205B2 JP S6222205 B2 JPS6222205 B2 JP S6222205B2 JP 53050484 A JP53050484 A JP 53050484A JP 5048478 A JP5048478 A JP 5048478A JP S6222205 B2 JPS6222205 B2 JP S6222205B2
- Authority
- JP
- Japan
- Prior art keywords
- wire
- heat treatment
- superconducting
- composite
- composite wire
- 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
Links
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】
この発明は超電導線材及びコイルの製法に関す
るものである。以下本発明を主にNb3Sn超電導線
材及びコイルの製作方法を例に説明する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing superconducting wires and coils. The present invention will be explained below, mainly taking as an example a method for manufacturing a Nb 3 Sn superconducting wire and coil.
超電導線は超電導体をCuなどの電気及び熱良
導体に埋め込んだ形をとると、安定化に関し優れ
ていることが周知である。例えばNb・Ti合金の
如き超電導体自身が可塑性を有する場合には
Nb・Ti合金とCuを複合しそれを、断面積縮少加
工及び加熱処理をコイルに巻回して所望の超電導
コイルを得る。しかしながらNb3Sn、V3Ga超電
導線の如き化合物系超電コイルを製作するに
Nb3Sn、V3Ga化合物は、それ自体が非常に脆く
そのためそれ等自身の形で線に製作されることは
なく、多くはNbとSn又はＶとGaを別個に含む線
材を複合し断面積縮少加工して、その後、
Nb3Sn、V3Gaの如き超電導化合物を生成させて
超電導コイルを得ていた。 It is well known that superconducting wires in which a superconductor is embedded in a good electrical and thermal conductor such as Cu are superior in terms of stabilization. For example, if the superconductor itself has plasticity, such as Nb/Ti alloy,
A desired superconducting coil is obtained by combining Nb/Ti alloy and Cu, applying cross-sectional area reduction processing and heat treatment, and then winding the composite into a coil. However, when manufacturing compound-based superconducting coils such as Nb 3 Sn and V 3 Ga superconducting wires,
Nb 3 Sn and V 3 Ga compounds are very brittle in themselves, so they are not made into wires in their own form, and are often cut by composite wires containing Nb and Sn or V and Ga separately. After area reduction processing,
Superconducting coils were obtained by producing superconducting compounds such as Nb 3 Sn and V 3 Ga.
第１図はこのようなNb3Sn複合超電導素線の一
実施例の横断面図であり、１はNb、２はSn、３
はCu、４はTaの如き隔壁材、５はCuである。Sn
又はCuを、純Sn又は純Cuの形で複合線内に配置
すると、それらが加工硬化を主じにくいことによ
り、複合素線を断面積縮少加工する際において、
軟化焼鈍処理を必要とすることなく断面積縮少加
工を続けることができるという利点を有してい
る。 Figure 1 is a cross-sectional view of an example of such a Nb 3 Sn composite superconducting wire, where 1 is Nb, 2 is Sn, and 3
is Cu, 4 is a partition material such as Ta, and 5 is Cu. Sn
Alternatively, if Cu is placed in the composite wire in the form of pure Sn or pure Cu, it is difficult to cause work hardening, so when processing the composite wire to reduce the cross-sectional area,
It has the advantage that cross-sectional area reduction processing can be continued without requiring softening annealing treatment.
しかしこの純Snは低融点金属であり、従来で
は熱処理において、線材の両端でSnが溶融溢出
し、線材の両端部で著るしい生成Nb3Sn化合物量
の減少を生じる。これは複合線を汚染し著るしく
は線の外周の安定化銅中にSnが拡散し安定化銅
としての働きを鈍らせるばかりか、コイルに巻回
した後での加熱処理においては、致命傷ともいう
べき巻線間の電気的短絡を生じる原因になるとい
う欠点を有しており、又これは加熱処理炉を汚染
し、後々の加熱処理に支障を招くことにもなつて
いた。 However, this pure Sn is a low melting point metal, and in the conventional heat treatment, Sn melts and overflows at both ends of the wire, resulting in a significant decrease in the amount of Nb 3 Sn compounds produced at both ends of the wire. This not only contaminates the composite wire and causes Sn to diffuse into the stabilizing copper on the outer periphery of the wire, slowing down its function as a stabilizing copper, but also causes fatal damage during the heat treatment after winding into a coil. This has the drawback of causing an electrical short circuit between the windings, which may also contaminate the heat treatment furnace and cause problems in subsequent heat treatment.
この発明は、熱処理温度で液状となる構成材料
を有する化合物超電導複合素線を熱処理して超電
導線材及びコイルを製作する際に生じる超電導複
合素線端面からの低融点金属の溶融溢出を防止す
ることを目的とする。 This invention aims to prevent melting and overflow of low-melting point metal from the end faces of superconducting composite wires, which occurs when manufacturing superconducting wires and coils by heat-treating compound superconducting composite wires having constituent materials that become liquid at heat treatment temperatures. With the goal.
すなわちこの発明は、未反応金属成分で構成し
た複合素線又はこの素線を巻回したコイルを熱処
理して化合物超電導線材又はコイルを得る製作方
法において、上記未反応金属成分中の低融点金属
の溶融溢出を防止する手段を施して、熱処理する
ことを特徴とするものである。 That is, the present invention provides a manufacturing method for obtaining a compound superconducting wire or coil by heat-treating a composite wire composed of an unreacted metal component or a coil wound with this wire, in which a low melting point metal in the unreacted metal component is heated. It is characterized by heat treatment with means for preventing melt overflow.
第２図はこの発明の一実施例で、熱処理前の複
合素線の端部の拡大図であり、第１図に横断面を
示した複合素線の端部を封止加熱処理し、Cuと
Snを相互に拡散させた複合素線の横断面であ
る。６はCu−Sn拡散層である。 FIG. 2 is an enlarged view of the end of the composite wire before heat treatment, showing an embodiment of the present invention. The end of the composite wire whose cross section is shown in FIG. and
This is a cross section of a composite wire in which Sn is mutually diffused. 6 is a Cu-Sn diffusion layer.
第１図に示す複合素線の端部を1080℃以下で封
止加熱処理を行うとCuとSnは互いに拡散し、こ
れらが液状になる温度はSnが25at％以下のSn−
Cu成分比を有する場合には概して700℃〜755℃
以上に上昇する。端部がこのような拡散した状態
になると、超電導化合物を生成させるため熱処理
を施こしてもSnの溢出はなく、前記したような
不都合は見られなくなる。 When the ends of the composite wire shown in Figure 1 are sealed and heat treated at 1080℃ or below, Cu and Sn will diffuse into each other, and the temperature at which they become liquid is the temperature at which Sn is 25 at% or below.
Generally 700℃~755℃ if it has Cu component ratio
rise above. When the end portions are in such a diffused state, Sn will not leak out even if heat treatment is performed to generate a superconducting compound, and the above-mentioned disadvantages will no longer be observed.
ところで上記説明では、この発明の一実施例と
して、Nb、Sn、Cuの各々純金属をその複合素線
の構成材として述べたが、Snを25at％以上のSn
を含むSn−Cu系金属としても同様な効果があ
り、特に80at％以上のSnを含むSn−Cu系金属に
おいては、非常に加工硬化を生じ難いことによ
り、複合素線を断面積縮少加工する上で有利であ
る。又、NbをNb合金等Nb系金属としてもこの発
明の効果がある。 Incidentally, in the above explanation, as an embodiment of the present invention, each of pure metals Nb, Sn, and Cu was described as the constituent material of the composite wire.
The same effect can be achieved with Sn-Cu metals containing 80at% or more of Sn.In particular, Sn-Cu metals containing 80at% or more of Sn are extremely hard to work harden, making it possible to reduce the cross-sectional area of composite wires. It is advantageous to do so. Moreover, the effect of the present invention can be obtained even if Nb is a Nb-based metal such as a Nb alloy.
又、Nb3Sn以外の化合物超電導素線の場合にお
いても、複合素線を構成する未反応金属のうち融
点の低い金属が液状になる温度が、封止加熱処理
によりその融点が上がり、化合物生成熱処理温度
よりも上になる場合に有効であることはいうまで
もない。 In addition, in the case of compound superconducting wires other than Nb 3 Sn, the temperature at which metals with low melting points among the unreacted metals constituting the composite wire becomes liquid is raised by the sealing heat treatment, and compounds are formed. Needless to say, it is effective when the temperature is higher than the heat treatment temperature.
化合物生成加熱処理の後において、封止加熱処
理部が臨界電流値その他の要因で不都合を生じる
場合には、その部分を切断除去すると問題はな
い。 After the compound-forming heat treatment, if the sealing heat-treated portion causes any inconvenience due to critical current value or other factors, there will be no problem if that portion is cut and removed.
この発明は以上説明したとおり、化合物超電導
線材及びコイルを製作するに、複合素線の端部
を、複合素線を構成する未反応金属が相互に拡散
するよう加熱して封止することにより、化合物生
成熱処理工程における低融点金属の溶融溢出を簡
単に防止することができ、優れた化合物超電導線
材及びコイルを確実・安定に製作できるという効
果がある。 As explained above, in manufacturing compound superconducting wires and coils, the present invention involves heating and sealing the ends of the composite wire so that the unreacted metals constituting the composite wire diffuse into each other. It is possible to easily prevent melting and overflow of low melting point metals in the compound generation heat treatment process, and there is an effect that excellent compound superconducting wires and coils can be manufactured reliably and stably.
第１図はNb3Sn化合物超電導複合素線の横断面
図、第２図は封止加熱処理をしたこの複合素線の
端部の横断面図である。
図中、１はNb、２はSn、３はCu、４はTa、５
はCu、６はCu−Sn相である。
FIG. 1 is a cross-sectional view of a Nb 3 Sn compound superconducting composite wire, and FIG. 2 is a cross-sectional view of the end of this composite wire that has been subjected to sealing heat treatment. In the figure, 1 is Nb, 2 is Sn, 3 is Cu, 4 is Ta, 5
is Cu, and 6 is Cu-Sn phase.
Claims (1)
素線を巻回したコイルを得る製作方法において、
上記複合素線の端部を、上記複合素線を構成する
未反応金属が相互に拡散するよう加熱して封止
し、その後化合物生成熱処理することを特徴とす
る化合物超電導線材又はコイル製作方法。1. In a manufacturing method for obtaining a composite wire composed of unreacted metal components or a coil wound with this wire,
A method for manufacturing a compound superconducting wire or coil, characterized in that the ends of the composite wire are heated and sealed so that unreacted metals constituting the composite wire are mutually diffused, and then subjected to heat treatment to form a compound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5048478A JPS54142584A (en) | 1978-04-27 | 1978-04-27 | Preparation of compound superconductive wire or coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5048478A JPS54142584A (en) | 1978-04-27 | 1978-04-27 | Preparation of compound superconductive wire or coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54142584A JPS54142584A (en) | 1979-11-06 |
| JPS6222205B2 true JPS6222205B2 (en) | 1987-05-16 |
Family
ID=12860181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5048478A Granted JPS54142584A (en) | 1978-04-27 | 1978-04-27 | Preparation of compound superconductive wire or coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54142584A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5832308A (en) * | 1981-08-19 | 1983-02-25 | 三菱電機株式会社 | Method of producing compound series composite superconductive wire |
| US4489219A (en) * | 1982-07-01 | 1984-12-18 | The United States Of America As Represented By The United States Department Of Energy | A-15 Superconducting composite wires and a method for making |
-
1978
- 1978-04-27 JP JP5048478A patent/JPS54142584A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54142584A (en) | 1979-11-06 |
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