JPH0732053B2 - Brittle superconductor connection method - Google Patents
Brittle superconductor connection methodInfo
- Publication number
- JPH0732053B2 JPH0732053B2 JP62189286A JP18928687A JPH0732053B2 JP H0732053 B2 JPH0732053 B2 JP H0732053B2 JP 62189286 A JP62189286 A JP 62189286A JP 18928687 A JP18928687 A JP 18928687A JP H0732053 B2 JPH0732053 B2 JP H0732053B2
- Authority
- JP
- Japan
- Prior art keywords
- brittle
- brittle superconductor
- superconductor
- connection method
- present
- 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 - Fee Related
Links
Landscapes
- Manufacturing Of Electrical Connectors (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、脆性超電導体の接続方法に関する。TECHNICAL FIELD The present invention relates to a method for connecting brittle superconductors.
従来の技術 従来より、電線などを機器に接続するにあたっては、比
較的柔らかい金属を線と共にカシメ，線を変形させると
同時に密着させ導通をとる手法やネジなどで締結し、同
時に線を変形せしめる方法が広く使用されている。超電
導体より成る複合線についても同様に接続される。2. Description of the Related Art Conventionally, when connecting an electric wire or the like to a device, a method of deforming a wire at the same time by crimping a relatively soft metal together with the wire, deforming the wire Is widely used. The same applies to composite wires made of superconductors.
発明が解決しようとする問題点 しかしながら、このような方法を、現在開発されつつあ
る脆性の高い材料（例えばＹ−Sr−Cu酸化物やPb系ペロ
ブスカイト）などに適用した場合には、線が接続時に破
壊してしまったり、又、緩くて脱離したり、さらには、
長期の信頼性に乏しく、使用中の振動や温度変化などに
より、線が破壊されたり、緩まり線が脱離したりする問
題が多発することが発見された。又、上述酸化物系の脆
性材料ではハンダ付けもできない。Problems to be Solved by the Invention However, when such a method is applied to a highly brittle material that is currently being developed (for example, Y—Sr—Cu oxide or Pb-based perovskite), lines are connected. Sometimes it is destroyed, or it is loose and detached, and moreover,
It was discovered that the reliability is poor for a long period of time, and there are many problems that the wire is broken or loosened due to vibration or temperature change during use. In addition, soldering cannot be performed with the above-mentioned oxide-based brittle material.
本発明は、上述のような接続端子部での破壊や脱離を防
止した信頼性の高い脆性超電導体の接続方法を提供す
る。The present invention provides a highly reliable method for connecting a brittle superconductor that prevents the breakage or detachment of the connection terminal portion as described above.
問題点を解決するための手段 脆性超電導体端周辺主要部分を高展性金属で包み、さら
に、その外側をより硬度の高い金属をあて、接合端子を
締結し、集中応力を防止し、不均一な過大な変形を防止
し、固着せしめる。Means for solving the problem Wrap the main part around the end of the brittle superconductor with a highly malleable metal, and then apply a harder metal to the outside to fasten the joint terminal, prevent concentrated stress, and uneven Prevents excessive deformation and secures them.
作用 脆性超電導体は、割れ，欠けに弱いことは衆知の通りで
あり、特に集中応力に弱い。It is well known that brittle superconductors are vulnerable to cracking and chipping, and are particularly vulnerable to concentrated stress.
本発明は、このような集中応力を分散せしめるために高
展性の比較的柔らかい金属をあて、その外側から硬い金
属でさらに締結することによって、長期的にも緩むこと
を回避している。The present invention avoids loosening in the long term by applying a relatively soft metal having high malleability to disperse such concentrated stress and further fastening with a hard metal from the outside.
実 施 例 第１図に示すように、約5mm径の脆性超電導体１に応力
緩和，集中応力防止のために、軟質の金属２として、軟
質の焼鈍無酸素銅片や、鉛片をはさみ、次に硬度の高い
当て板３として、硬質の含酸素銅を用い、接合端子箱４
に対してネジ５で締結した。Practical example As shown in Fig. 1, a soft annealed oxygen-free copper piece or a lead piece was inserted as a soft metal 2 in a brittle superconductor 1 having a diameter of about 5 mm in order to relax stress and prevent concentrated stress. Next, a hard oxygen-containing copper is used as the backing plate 3 having the highest hardness, and the junction terminal box 4 is used.
Was fastened with screws 5.
比較のため、軟質金属２を抜いた接合を準備した。この
本発明例及び比較例を約5Gの繰り返し加速度テストを１
万回行った所、本発明例では破損や緩みによる線材脱離
は、15試験体中の２体にすぎなかったが、対比例では、
15試験体全数に不良が生じた。又、液体窒素／室温での
繰り返し温度衝撃テストでも、本発明例では、不良発生
が3/15に対し、対比例では14/15の不良発生があった。For comparison, a joint without soft metal 2 was prepared. This invention example and comparative example were subjected to a repeated acceleration test of about 5G.
After being carried out ten thousand times, in the present invention example, the wire detachment due to breakage or loosening was only 2 out of 15 test specimens, but in contrast,
All 15 specimens were defective. Also, in the repeated temperature shock test at liquid nitrogen / room temperature, in the example of the present invention, the defect occurrence was 3/15, whereas in contrast, the defect occurrence was 14/15.
次に、脆性超電導体１の端子部を真円状に研磨した后、
第２図に示すように、軟質金属２を介して、接合端子４
をネジ５によって締結した。軟質金属２としては上述の
ように軟質銅を用いた。この時、同図に示すように、つ
なぎめがあり、締結後にこのつなぎ目の隙間がほぼなく
なるのが応力分布の点から望ましい。Next, after polishing the terminal portion of the brittle superconductor 1 into a perfect circle,
As shown in FIG. 2, the joining terminal 4 is connected via the soft metal 2.
Were fastened with screws 5. As the soft metal 2, soft copper was used as described above. At this time, as shown in the figure, it is desirable from the viewpoint of stress distribution that there is a joint and that the gap between the joints is almost eliminated after fastening.
次に対比例として、軟質金属２を欠いた接合を形成し
た。上述のように、加速度テストを行った所、本発明例
では20試験体中の不良は全くなく、対比例では、上述の
例より改善されてはいるものの、やはり16/20の不良が
生じた。温度衝撃テストの結果でもやはり、本発明で
は、1/20,対比例では14/20の不良が生じた。Next, as a contrast, a bond lacking the soft metal 2 was formed. As described above, when the acceleration test was carried out, in the present invention example, there were no defects in 20 test bodies at all, and in comparison, although it was improved from the above example, 16/20 defects still occurred. . Also in the result of the temperature shock test, in the present invention, defects of 1/20 and 14/20 in comparison occurred.
次に第３図に示すように、脆性超電導体１の周辺に軟質
金属２のリングをかぶせ、さらに、少し大きめの形状記
憶合金４を挿入し後、変態温度に保持することによっ
て、締結せしめることもできた。この時も上述のような
強度が得られた。Next, as shown in FIG. 3, a brittle superconductor 1 is covered with a ring of a soft metal 2, and a slightly larger shape memory alloy 4 is inserted, and then held at a transformation temperature for fastening. I also got it. At this time, the above-mentioned strength was obtained.
発明の効果 本発明によれば、脆性超電導体を対象とするにも拘ら
ず、信頼性の高い接続が得られる。EFFECTS OF THE INVENTION According to the present invention, a highly reliable connection can be obtained in spite of a brittle superconductor.
第１図〜第３図は本発明の実施例における脆性超電導体
の接合方法を示す断面図である。 １……脆性超電導体、２……軟質の金属、３……当て
板。1 to 3 are cross-sectional views showing a method for joining brittle superconductors in an example of the present invention. 1 ... Brittle superconductor, 2 ... Soft metal, 3 ... Patch plate.
Claims (2)
端子を主たる構成要素とし、脆性の超電導体周辺主要部
分と接合端子とを少なくとも軟質の高展性金属を介して
接続することを特徴とした脆性超電導体の接続方法。1. A brittle superconductor, a soft highly malleable metal, and a joining terminal as main components, and a brittle superconductor peripheral main part and a joining terminal are connected via at least a soft highly malleable metal. A method for connecting brittle superconductors characterized by.
することを特徴とする特許請求の範囲第１項記載の脆性
超電導体の接続方法。2. The method for connecting a brittle superconductor according to claim 1, wherein the shape memory alloy is fastened by being deformed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62189286A JPH0732053B2 (en) | 1987-07-29 | 1987-07-29 | Brittle superconductor connection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62189286A JPH0732053B2 (en) | 1987-07-29 | 1987-07-29 | Brittle superconductor connection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6433872A JPS6433872A (en) | 1989-02-03 |
| JPH0732053B2 true JPH0732053B2 (en) | 1995-04-10 |
Family
ID=16238783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62189286A Expired - Fee Related JPH0732053B2 (en) | 1987-07-29 | 1987-07-29 | Brittle superconductor connection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0732053B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5168259A (en) * | 1989-09-19 | 1992-12-01 | Semiconductor Energy Laboratory Co., Ltd. | Superconducting coil |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63110566A (en) * | 1986-10-29 | 1988-05-16 | 株式会社日立製作所 | How to join superconducting wires |
| JPS63245885A (en) * | 1987-03-31 | 1988-10-12 | Toshiba Corp | Connection of superconductive wires |
-
1987
- 1987-07-29 JP JP62189286A patent/JPH0732053B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6433872A (en) | 1989-02-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |