JPH04202065A - Method for joining oxide superconductor and metal superconductor - Google Patents
Method for joining oxide superconductor and metal superconductorInfo
- Publication number
- JPH04202065A JPH04202065A JP2337285A JP33728590A JPH04202065A JP H04202065 A JPH04202065 A JP H04202065A JP 2337285 A JP2337285 A JP 2337285A JP 33728590 A JP33728590 A JP 33728590A JP H04202065 A JPH04202065 A JP H04202065A
- Authority
- JP
- Japan
- Prior art keywords
- superconductor
- joining
- metal
- oxide
- oxide superconductor
- 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.)
- Pending
Links
- 239000002887 superconductor Substances 0.000 title claims abstract description 58
- 239000002184 metal Substances 0.000 title claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 25
- 238000005304 joining Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 229910052709 silver Inorganic materials 0.000 claims abstract description 9
- 238000011282 treatment Methods 0.000 claims abstract description 7
- 229910052737 gold Inorganic materials 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims abstract description 3
- 238000000576 coating method Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 12
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 239000004332 silver Substances 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 5
- 239000010931 gold Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 abstract description 6
- 230000008018 melting Effects 0.000 abstract description 6
- 238000003825 pressing Methods 0.000 abstract description 5
- 238000005096 rolling process Methods 0.000 abstract description 5
- 238000005245 sintering Methods 0.000 abstract description 5
- 229910001316 Ag alloy Inorganic materials 0.000 abstract 1
- 229910020012 Nb—Ti Inorganic materials 0.000 description 6
- 239000011247 coating layer Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 229910000881 Cu alloy Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005219 brazing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000007740 vapor deposition Methods 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
- Ceramic Products (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的コ
（産業上の利用分野）
本発明は酸化物系超電導体と金属系超電導体あるいは極
細多芯化金属系超電導線材との接合方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention (Industrial Application Field) The present invention relates to a method for joining an oxide superconductor and a metal superconductor or an ultrafine multicore metal superconducting wire.
（従来の技術）
従来、酸化物系超電導体と金属系超電導体あるいは極細
多芯化金属系超電導線材との接合は機械的接合やろう付
は等の方法で行われている。(Prior Art) Conventionally, oxide superconductors and metallic superconductors or ultrafine multicore metallic superconducting wires have been joined by mechanical bonding, brazing, or the like.
（発明が解決しようとする問題点）
しかしながら、この接合はセラミックスと金属の接合と
なるため、非常に困難である。セラミックスは脆性材料
であるため機械的強度が小さく、また金属との接合性も
小さい。上記の従来の接合方法では超電導接続を保持す
ることがむずがしく、接合部の機械的強度も小さく、ま
た、接触抵抗が大きい等の問題点がある。(Problems to be Solved by the Invention) However, this joining involves joining ceramics and metal, which is extremely difficult. Since ceramics are brittle materials, their mechanical strength is low, and their bondability with metals is also low. The conventional bonding methods described above have problems such as difficulty in maintaining superconducting connections, low mechanical strength of the bonded portion, and high contact resistance.
本発明は、酸化物系超電導体と金属系超電導体あるいは
極細多芯化金属系超電導線材との接合において、超電導
接続ないしは低抵抗接続を実現し、かつ機械的強度の向
上を図ることを目的とする。The purpose of the present invention is to realize a superconducting connection or a low resistance connection and to improve mechanical strength in joining an oxide-based superconductor and a metal-based superconductor or an ultrafine multicore metal-based superconducting wire. do.
［発明の構成コ
（問題点を解決するための手段）
」１記問題点を解決するために、金属系超電導体と酸化
物系超電導体の接触面積が大きくなるように接合面を加
工し、焼結あるいは溶融等の熱処理、プレスや圧延等の
加工を施して接合するものである。[Structure of the Invention (Means for Solving the Problems)] In order to solve the problem described in 1, the joint surfaces of the metal-based superconductor and the oxide-based superconductor are processed so that the contact area is increased, They are joined by heat treatment such as sintering or melting, and processing such as pressing or rolling.
金属系超電導体が極細多芯化された金属系超電導線材で
ある場合は、金属系超電導線材の接合端部の一定領域か
ら安定化材である銅や銅合金を酸などにより一部あるい
は完全に溶解除去することにより凹凸形状の面を形成し
、この面を酸化物系超電導体と接合させる。そして、上
述の方法と同様に加熱処理および加圧処理を施す。When the metallic superconductor is an ultra-fine multi-core metallic superconducting wire, the stabilizing material copper or copper alloy is partially or completely removed from a certain area of the joint end of the metallic superconducting wire using acid. By dissolving and removing it, an uneven surface is formed, and this surface is bonded to the oxide superconductor. Then, heat treatment and pressure treatment are performed in the same manner as in the above method.
さらに、接合面に金または銀あるいはそれらの合金から
なるコーティング膜を設けてから加熱処理および加圧処
理を施すことによっても良好な低抵抗接合を得ることが
できる。Furthermore, a good low-resistance bond can also be obtained by providing a coating film made of gold, silver, or an alloy thereof on the bonding surface and then performing heat treatment and pressure treatment.
（作用） 本発明の接合方法を図面に基づいて説明する。(effect) The joining method of the present invention will be explained based on the drawings.
第１図は本発明の酸化物系超電導体と金属系超電導体と
の接合部の断面の模式図である。酸化物系超電導体１と
金属系超電導体２の接触面積が大きくなるように接合面
に凹凸を設け、両者を結合して接合部を形成し、焼結あ
るいは溶融等の熱処理、プレスや圧延等の加工を施して
接合する。FIG. 1 is a schematic cross-sectional view of a joint between an oxide superconductor and a metal superconductor of the present invention. The oxide superconductor 1 and the metal superconductor 2 are provided with irregularities on their joint surfaces so that the contact area becomes large, and the two are joined to form a joint, which is then subjected to heat treatment such as sintering or melting, pressing, rolling, etc. Process and join.
第２図は酸化物系超電導体と銅や銅合金を安定化材とし
た極細多芯化金属系超電導線材との接合部の断面の模式
図である。極細多芯化された金属系超電導線材Ｓの端部
から一定領域の安定化材の一部を酸などにより溶融除去
する。これを酸化物超電導体１と結合させる。その後、
第１図に示した場合と同様に、焼結あるいは溶融等の熱
処理、プレスや圧延等の加工を施して金属系超電導線材
と酸化物系超電導体とを接合させる。FIG. 2 is a schematic cross-sectional view of a joint between an oxide superconductor and an ultrafine multicore metal superconducting wire using copper or a copper alloy as a stabilizing material. A part of the stabilizing material in a certain area is removed by melting with acid or the like from the end of the ultra-fine multicore metallic superconducting wire S. This is combined with the oxide superconductor 1. after that,
Similar to the case shown in FIG. 1, heat treatment such as sintering or melting, and processing such as pressing or rolling are performed to join the metal superconducting wire and the oxide superconductor.
また、安定化材の除去量としては、第３図に示すように
、極細多芯化された金属系超電導線ｋＡ’ ３の一定額
域の安定化材をすべて溶解除去して、金属系超電導細線
４のみを露出させて酸化物超電導体１と接合させること
も可能である。In addition, as for the amount of stabilizing material removed, as shown in Figure 3, all the stabilizing material in a certain area of the ultra-fine multicore metallic superconducting wire kA' 3 is dissolved and removed, and the metallic superconducting material is It is also possible to expose only the thin wire 4 and connect it to the oxide superconductor 1.
以上の接合方法によれば、超電導接続を保持することが
出来る上、酸化物系超電導体と金属系超電導体との接合
部の機械的強度が向上する。According to the above bonding method, not only can superconducting connections be maintained, but also the mechanical strength of the bonded portion between the oxide superconductor and the metal superconductor is improved.
第４〜６図は、それぞれ第１〜３図に示した金属系超電
導体の接合界面に、金、銀またはそれらの合金をメツキ
、蒸着などしてコーティング層５を形成した後、焼結あ
るいは溶融等の熱処理、プレスや圧延等の加工を施して
酸化物系超電導体と接合したものである。4 to 6 show a coating layer 5 formed by plating, vapor deposition, etc. of gold, silver, or an alloy thereof on the bonding interface of the metallic superconductors shown in FIGS. 1 to 3, respectively, and then sintering or It is bonded to an oxide-based superconductor through heat treatment such as melting and processing such as pressing and rolling.
第４図は、第１図に示した方法と同様な方法で金属系超
電導体２の接合面を加工した後、金属系超電導体２の凹
凸面に金、銀またはそれらの合金のコーティング層５を
形成し、酸化物系超電導体１と接合したものである。FIG. 4 shows a coating layer of gold, silver, or an alloy thereof formed on the uneven surface of the metallic superconductor 2 after the bonding surface of the metallic superconductor 2 is processed in the same manner as shown in FIG. 1. is formed and joined to an oxide-based superconductor 1.
第５図および第６図は、第２図および第３図に示した方
法により端部に凹凸形状が形成された金属系超電導線材
Ｓの接合面に金、銀またはそれらの合金のコーティング
層５を形成し、酸化物系超電導体１と接合したものであ
る。5 and 6 show a coating layer 5 of gold, silver, or an alloy thereof on the joint surface of a metallic superconducting wire S having an uneven shape formed at the end by the method shown in FIGS. 2 and 3. is formed and joined to an oxide-based superconductor 1.
これらの接合方法によれば、接合界面での電気的接触抵
抗を極めて低下させることが出来る。According to these bonding methods, the electrical contact resistance at the bonding interface can be extremely reduced.
（実施例） 以下、本発明の接合方法の実施例について説明する。(Example) Examples of the joining method of the present invention will be described below.
実施例１．酸化物系超電導体としてＢｉ系酸化物超電導
体、極細多芯化超電導線材としてＮｂ−Ｔｉ系超電導体
を用いる。Ｎｂ−Ｔｉ系極細多芯化超電導線材の端部の
一定領域の安定化材を酸で一部溶解除去し接合面を凹凸
形状にした。これをＢｉ系酸化物超電導体と接合させ、
加熱、加圧処理を加えた。この結果、Ｂｉ系酸化物超電
導体とＮｂ−Ｔｉ系極細多芯化超電導体との超電導接続
が得られた。Example 1. A Bi-based oxide superconductor is used as the oxide-based superconductor, and a Nb-Ti-based superconductor is used as the ultrafine multicore superconducting wire. The stabilizing material in a certain area at the end of the Nb-Ti ultrafine multicore superconducting wire was partially dissolved and removed with acid to form an uneven joint surface. This is bonded to a Bi-based oxide superconductor,
Heat and pressure treatment were applied. As a result, a superconducting connection between the Bi-based oxide superconductor and the Nb-Ti-based ultrafine multicore superconductor was obtained.
実施例２．実施例１の方法において、Ｎｂ−Ｔｉ系極細
多芯化超電導線材の端部の一定領域の安定化材を酸で一
部溶解除去するのではなく、すべて溶解除去してＮｂ−
Ｔｉ系超電導細線を露出させた場合についても同様に超
電導接続を得ることができた。Example 2. In the method of Example 1, instead of partially dissolving and removing the stabilizing material in a certain area at the end of the Nb-Ti ultrafine multicore superconducting wire with acid, all of the stabilizing material is dissolved and removed.
A similar superconducting connection was also obtained when the Ti-based superconducting thin wire was exposed.
実施例３．実施例１の方法において、ＢＩ系酸化物系超
電導体とＮｂ−Ｔｉ系極細多芯化線材の接合界面に銀を
コーティングして接合し、加熱、加圧操作を加えた。こ
の結果、４．２Ｋにおいて１０−８〜１０−９Ω・０ｍ
２という極めて低い電気的接触抵抗を得た。Example 3. In the method of Example 1, the bonding interface between the BI oxide superconductor and the Nb-Ti ultrafine multicore wire was coated with silver and bonded, followed by heating and pressurizing. As a result, at 4.2K, 10-8 to 10-9Ω・0m
An extremely low electrical contact resistance of 2 was obtained.
実施例４．実施例２の方法において、Ｂｉ系酸化物系超
電導体とＮｂ−Ｔｉ系極細多芯化線材の接合界面に銀を
コーティングして接合し、加熱、加圧操作を加えた。こ
の結果も実施例３の場合と同様に、４．２Ｋにおいて１
０−８〜１０−９Ω・０ｍ２の電気的接触抵抗を得た。Example 4. In the method of Example 2, the bonding interface between the Bi-based oxide superconductor and the Nb-Ti-based ultrafine multicore wire was coated with silver and bonded, followed by heating and pressurizing operations. This result is also similar to the case of Example 3, and 1 at 4.2K.
An electrical contact resistance of 0-8 to 10-9 Ω·0 m2 was obtained.
［発明の効果コ
本発明の接合方法によれば、酸化物系超電導体と金属系
超電導体あるいは極細多芯化超電導線材の接合部の性能
向上を図ることができ、酸化物系超電導体と金属系超電
導体の超電導接続ないしは低抵抗接続を保持することが
できた。接合部の機械的強度も従来法と比較して向上す
るなどの効果がある。[Effects of the Invention] According to the joining method of the present invention, it is possible to improve the performance of the joint between an oxide superconductor and a metal superconductor or an ultrafine multicore superconducting wire. It was possible to maintain a superconducting connection or a low resistance connection of the system superconductor. This method also has the effect of improving the mechanical strength of the joint compared to conventional methods.
第１図は本発明の接合方法による酸化物系超電導体と金
属系超電導体の接合部の断面の模式図、第２図および第
３図は本発明の接合方法による酸化物系超電導体と銅や
銅合金を安定化材とした極細多芯化金属系超電導線材と
の接合部の断面の模式図、第４〜６図は第１〜３図に示
した接合方法において、接合界面に金、銀またはそれら
の合金によるコーティング層を形成する本発明の接合方
法による接合部の模式図である。
１・・・酸化物系超電導体、２・・・金属系超電導体、
Ｓ・・・極細多芯化金属系超電導線材、４・・・金属系
超電導細線、５・・・コーティング層。
第４図
第５図
第６図FIG. 1 is a schematic cross-sectional view of a joint between an oxide superconductor and a metal superconductor by the joining method of the present invention, and FIGS. Figures 4 to 6 are schematic cross-sectional views of the joints with ultrafine multicore metal superconducting wires using copper alloy as a stabilizing material. FIG. 2 is a schematic diagram of a bonded portion formed by the bonding method of the present invention in which a coating layer of silver or an alloy thereof is formed. 1... Oxide-based superconductor, 2... Metal-based superconductor,
S... Ultra-fine multicore metallic superconducting wire, 4... Metallic superconducting thin wire, 5... Coating layer. Figure 4 Figure 5 Figure 6
Claims (2)
いて、接合すべき酸化物系超電導体と金属系超電導の接
合面を凹凸形状とし、加熱処理および加圧処理を施すこ
とを特徴とする酸化物系超電導体と金属系超電導体との
接合方法。(1) In joining an oxide superconductor and a metal superconductor, the joining surface of the oxide superconductor and the metal superconductor to be joined is made into an uneven shape and subjected to heat treatment and pressure treatment. A method for joining oxide-based superconductors and metal-based superconductors.
との接合において、該金属系超電導線材の接合端部の一
定領域から安定化材を一部あるいは完全に除去すること
により凹凸形状の面が形成された接合面を酸化物系超電
導体と接合させ、加熱処理および加圧処理を施すことを
特徴とする酸化物系超電導体と金属系超電導体との接合
方法。（３）前記接合面に金または銀あるいはそれらの
合金からなるコーティング膜を設けることことを特徴と
する請求項１または２記載の酸化物系超電導体と金属系
超電導体との接合方法。(2) In joining an oxide superconductor and an ultra-fine multicore metal superconducting wire, the stabilizing material is partially or completely removed from a certain area of the joining end of the metal superconducting wire to create an uneven shape. 1. A method for joining an oxide superconductor and a metal superconductor, the method comprising joining an oxide superconductor to a joining surface on which a surface is formed, and subjecting the bonded surface to heat treatment and pressure treatment. (3) The method for joining an oxide-based superconductor and a metal-based superconductor according to claim 1 or 2, characterized in that a coating film made of gold, silver, or an alloy thereof is provided on the joining surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2337285A JPH04202065A (en) | 1990-11-30 | 1990-11-30 | Method for joining oxide superconductor and metal superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2337285A JPH04202065A (en) | 1990-11-30 | 1990-11-30 | Method for joining oxide superconductor and metal superconductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04202065A true JPH04202065A (en) | 1992-07-22 |
Family
ID=18307177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2337285A Pending JPH04202065A (en) | 1990-11-30 | 1990-11-30 | Method for joining oxide superconductor and metal superconductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04202065A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017057985A1 (en) * | 2015-10-02 | 2017-04-06 | 한국전기연구원 | Method for bonding stacked superconducting wires, and superconducting wire unit stack-bonded by same |
| WO2024075481A1 (en) * | 2022-10-04 | 2024-04-11 | 住友電気工業株式会社 | Superconducting wire material connection structure, and layered structure |
-
1990
- 1990-11-30 JP JP2337285A patent/JPH04202065A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017057985A1 (en) * | 2015-10-02 | 2017-04-06 | 한국전기연구원 | Method for bonding stacked superconducting wires, and superconducting wire unit stack-bonded by same |
| WO2024075481A1 (en) * | 2022-10-04 | 2024-04-11 | 住友電気工業株式会社 | Superconducting wire material connection structure, and layered structure |
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