JPH01302676A - Method for connection of oxide type superconductive conductor - Google Patents
Method for connection of oxide type superconductive conductorInfo
- Publication number
- JPH01302676A JPH01302676A JP63132485A JP13248588A JPH01302676A JP H01302676 A JPH01302676 A JP H01302676A JP 63132485 A JP63132485 A JP 63132485A JP 13248588 A JP13248588 A JP 13248588A JP H01302676 A JPH01302676 A JP H01302676A
- Authority
- JP
- Japan
- Prior art keywords
- superconducting
- oxide
- connection
- superconductors
- oxide type
- 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.)
- Granted
Links
- 239000004020 conductor Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims description 13
- 239000002887 superconductor Substances 0.000 claims abstract description 49
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 33
- 239000007921 spray Substances 0.000 claims abstract description 16
- 230000004927 fusion Effects 0.000 abstract 4
- 239000000843 powder Substances 0.000 description 27
- 238000007751 thermal spraying Methods 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 238000005219 brazing Methods 0.000 description 6
- 239000012298 atmosphere Substances 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000005304 joining Methods 0.000 description 4
- 239000011812 mixed powder Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- -1 B A compound Chemical class 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000004021 metal welding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/80—Constructional details
Landscapes
- Manufacturing Of Electrical Connectors (AREA)
Abstract
Description
【発明の詳細な説明】 「産業上の利用分野」 この発明は酸化物超電導導体を接続する方法に関する。[Detailed description of the invention] "Industrial application field" This invention relates to a method of connecting oxide superconducting conductors.
「従来の技術」
最近に至り、常電導状態から超電導状態に遷移する臨界
温度が液体窒素温度を超える高い値を示す酸化物系の超
電導体が種々発見されている。この種の酸化物超電導体
は、Ｙ −Ｂ ａ−Ｃｕ−０系、Ｂ１−５ ｒ−Ｃａ−
Ｃｕ−０系あるいはＴ ｉｃ ａ−Ｂ ａ−Ｃｕ−０系
などに代表される酸化物である。そして、この種の酸化
物超電導体を製造するには、前記の各元素を含有する化
合物粉末（酸化物粉末、炭酸塩粉末など）あるいは合金
粉末などを所定の比率で混合して混合粉末を得、この混
合粉末を所定の形状に成形した後に熱処理を施す方法が
採用されている。"Prior Art" Recently, various oxide-based superconductors have been discovered whose critical temperature for transitioning from a normal conducting state to a superconducting state is higher than the temperature of liquid nitrogen. This type of oxide superconductor includes Y-Ba-Cu-0 system, B1-5 r-Ca-
These are oxides typified by Cu-0 series or Tica-Ba-Cu-0 series. To manufacture this type of oxide superconductor, compound powders (oxide powders, carbonate powders, etc.) or alloy powders containing each of the above elements are mixed in a predetermined ratio to obtain a mixed powder. A method has been adopted in which this mixed powder is formed into a predetermined shape and then subjected to heat treatment.
また、前述の酸化物超電導体を超電導マグネットなどの
超電導機器に適用するために、前記酸化物超電導体を線
状化する試みもなされ、金属管の内部に酸化物超電導粉
末を充填した後に縮径加工を施し、更に熱処理する方法
、あるいは、安定化部材となる金属テープの表面に酸化
物超電導層を形成して導体化する方法などがなされてい
る。In addition, in order to apply the aforementioned oxide superconductor to superconducting devices such as superconducting magnets, attempts have been made to linearize the oxide superconductor, and after filling the inside of a metal tube with oxide superconducting powder, the diameter is reduced. Methods include processing and further heat treatment, or forming an oxide superconducting layer on the surface of a metal tape serving as a stabilizing member to make it a conductor.
「発明が解決しようとする課題」
ところで、このように製造された酸化物超電導線を実際
に超電導機器に組み込んだり、送電用などとして使用（
７よ・）とした場合、これらの酸化物超電導線を他の酸
化物超電導線と接続４−る必要が生じる。``Problem to be solved by the invention'' By the way, it is possible to actually incorporate the oxide superconducting wire manufactured in this way into superconducting equipment or use it for power transmission, etc.
7), it becomes necessary to connect these oxide superconducting wires to other oxide superconducting wires.
しかしながらこの種の酸化物超電導体は極めて脆いため
に、撚り合わせなどの手段ににる接続では酸化物超電導
体にクラックを生じさせるおそれかぁ−）て困稚である
。また、はんだ等の金属接着剤を用いｆコ場合には、接
合部分に電気抵抗を生じるので完全な接合は困難な問題
がある。更に、金属接６剤で接合した部分を冷媒で臨界
温度以下の低温に冷却１．た場合、酸化物超電導体と金
し４接ｎ削の熱膨張率の差異によって収縮応力か作用し
て金属接着剤が剥離し易い問題がある。However, since this type of oxide superconductor is extremely brittle, connection by means such as twisting is difficult because it may cause cracks in the oxide superconductor. Furthermore, when a metal adhesive such as solder is used, electrical resistance is generated in the joint portion, making it difficult to achieve a perfect joint. Furthermore, the part joined with the metal welding agent is cooled to a low temperature below the critical temperature using a refrigerant.1. In this case, there is a problem in that the metal adhesive is likely to peel off due to shrinkage stress due to the difference in thermal expansion coefficient between the oxide superconductor and the metal 4-n cutting.
なお、この種の超電導導体の接続方法として、超電導粉
末を溶媒に分散させたペーストを作成し、超電導導体の
端ｊ１Ｓとうしをスリーブで接続した後にスリーブ内に
このペーストを充Ｉｎシ、この後に焼結、ｔ−る方法が
ち′えられている。In addition, as a method for connecting this type of superconducting conductor, a paste is prepared by dispersing superconducting powder in a solvent, and after connecting the ends of the superconducting conductor with a sleeve, this paste is filled into the sleeve. Different sintering and turing methods are available.
ところがこの方法では、ペースト中に告白゛される不純
物が接合部分に残留１．て通電時の抵抗になる問題があ
る。However, with this method, impurities found in the paste remain at the joint.1. There is a problem that it becomes a resistance when electricity is applied.
本発明は、前記課題を解決するためになされたもので、
接合部分に電気抵抗を生じさ且ることなく酸化物超電導
導体どうしを容易に接合することができ、安定化部材と
酸化物超電導体の両方に対する密着性も良好な接続方法
を提供することを目的とする。The present invention has been made to solve the above problems,
The purpose is to provide a connection method that allows oxide superconducting conductors to be easily joined together without creating electrical resistance at the joining part, and that also has good adhesion to both the stabilizing member and the oxide superconductor. shall be.
「課題を解決するための手段」
本発明は、前記課題を解決するために、酸化物超電導体
に安定化部材を小設置、てなる酸化物超電導導体どうし
の接続方法において、各超電導導体の端部から安定化部
材と超電導体のどちらか一方を除去して他方を突出させ
、突出さＵ゛た部Ｈを突き合イつせ、突き合わせ部分の
周囲に溶射ガンを用いて接続用の酸化物超電導体を溶射
して接続するものである。"Means for Solving the Problems" In order to solve the problems described above, the present invention provides a method for connecting oxide superconducting conductors, which includes installing a small stabilizing member in an oxide superconductor, at the end of each superconducting conductor. Either the stabilizing member or the superconductor is removed from the part, the other is made to protrude, the protruding U-shaped parts H are butted together, and a thermal spray gun is used to coat the area around the abutting part with oxide for connection. The connection is made by thermally spraying a superconductor.
「作用 」
接続するべき超電導導体の端部どうしの突、き合わせ部
分に溶射によって新たに接続用酸化物超電導体が生成さ
れ、この接続用酸化物超電導体により両方の酸化物超電
導体が接続される。従って接続部分に電気抵抗を生じさ
せることなく導体の断面積を増やすことなく酸化物超電
導導体どうしの接続かできる。また、溶射による吹き付
ＩＪによって形成された接続用酸化物超電導体は超電導
導体の安定化部材と酸化物超電導体の両方に十分に密行
、３−る。なお、溶射ガンにより接続を行うために、溶
射ガンを持ち込みできる場所であれば超電導導体が設置
された現場などにおいてら容易に接続が可能になる。"Operation" A new connecting oxide superconductor is generated by thermal spraying at the butt and joint portions of the ends of the superconducting conductors to be connected, and both oxide superconductors are connected by this connecting oxide superconductor. Ru. Therefore, oxide superconducting conductors can be connected to each other without creating electrical resistance at the connecting portion and without increasing the cross-sectional area of the conductor. Further, the connecting oxide superconductor formed by IJ by thermal spraying is sufficiently adhered to both the stabilizing member of the superconductor and the oxide superconductor. Since the connection is made using a thermal spray gun, the connection can be easily made at a site where the superconducting conductor is installed, as long as the thermal spray gun can be brought into the site.
「実施例ｊ
第１図ない１．第３図は、テープ状の超電導導体を接続
する場合にこの発明を適用した一実施例を説明するため
のもので、この例においてはテープ状の安定化部材ｌの
上面に酸化物超電導層２を形成しでなる酸化物超電導導
体Ａと、テープ状の安定化部Ｈ３の１−而に酸化物超電
導層４を形成（７てなる酸化物超電導導体Ｉ３を接続す
る。``Example j Figure 1 (not shown) Figure 3 is for explaining an example in which the present invention is applied when connecting tape-shaped superconducting conductors. An oxide superconducting conductor A consisting of an oxide superconducting layer 2 formed on the upper surface of a member L, and an oxide superconducting conductor I3 consisting of a tape-shaped stabilizing portion H3, and an oxide superconducting layer 4 formed thereon (7). Connect.
前記安定化部付１，３は、後述する溶射時におｉする熱
履歴に耐え、しかも導電性に富むＣ）のか選択され、具
体的には銅、銀などの良導電性金炙材料から、あるいは
、タングステン、ステンレス屑、セラミックなどからな
る縫付テープの表面に良導電性の金ｊ４コーティングを
施した複合テープなどからなるものであって、安定化部
材１．３は超電導層２．４が常電導状態に転位すること
を抑制するとともに、超電導層２．４が常電導状態に転
位した場合に導電路となるように超電導層２．４に密ｎ
した状態で添設されている。なお、安定化部材１，３は
脆い超電導層２，４の補強層とらな、っている。The stabilizing parts 1 and 3 are selected from C) which can withstand the thermal history during thermal spraying described later and is highly conductive. Alternatively, the stabilizing member 1.3 is made of a composite tape in which the surface of the sewing tape made of tungsten, stainless steel scrap, ceramic, etc. is coated with gold J4, which has good conductivity. The superconducting layer 2.4 is densely packed to suppress the transition to the normal conductive state and to form a conductive path when the superconducting layer 2.4 transitions to the normal conductive state.
It is attached in a state where it is attached. Note that the stabilizing members 1 and 3 are reinforcing layers for the brittle superconducting layers 2 and 4.
前記超電導層２，４は、一般式Ａ−Ｂ Ｃｕ Ｏ（た
だしＡはＳ ｃ、Ｙ 、１． ａ、Ｅ ｕ、［−Ｔｏ、
Ｅ ｒなどの周期律表ｎｌａ族元素のｌ ）ｌ以−トと
Ｉ３ ｉと′Ｉ゛１の内から選択される１挿具」−を示
１７、［３はＭｇ、Ｃａ、Ｓ ｒ、Ｉ３ａ、Ｒａなどの
周期律表Ｈａ族元素の１種以上を示Ａ。）で示される酸
化物超電導体からなるもので、具体的なものを例示する
ならば、Ｙ ＋Ｂ ａｔＣｕ３０ ？−，５、Ｂ ｉｔ
ｓ ｒ＋ｃａ＋ｃｕ＊ｏ ｙ、 、 Ｔ １ｔｃａｔＢ
ａｔｃＬＩ＋＋ＯＸ 、；。The superconducting layers 2 and 4 have the general formula A-B CuO (where A is Sc, Y, 1.a, Eu, [-To,
17, [3 is Mg, Ca, S r, A indicates one or more elements of the Ha group of the periodic table, such as I3a and Ra. ), a specific example is Y + B atCu30 ? -, 5, Bit
s r+ca+cu*o y, , T 1tcatB
atcLI++OX,;.
とでの式で示されるものである。This is shown by the formula:
前記超電導導体Ａ、Ｂを接続するには、超電導導体Ａ、
Ｈの端部から超電導層２．４を所定の長さ（例えば数ｃ
ｍ程度）にわたり除去して安定化部材１゜３を第１図に
示すように突出させる。To connect the superconducting conductors A and B, superconducting conductor A,
The superconducting layer 2.4 is stretched from the end of H to a predetermined length (for example, several centimeters)
m) to make the stabilizing member 1.3 protrude as shown in FIG.
次に超電導導体Ａ、Ｂの突出させた安定化部材１．３の
端部どうじを第２図に示すように突き合わせ、突き合わ
せ部分の安定化部材１．３を接合する。この接合を行う
場合、安定化母材１．３が金属などからなる場合は、銀
ろう、はんだなどのろう付は金属を用いたろう付けある
いは溶接などを行い、セラミックテープの場合はろう付
けあるいはブレージングなどの公知の方法を用いること
ができる。安定化部材！、３を接合した状態で接合部分
には第２図に示すような凹部５が形成される。Next, the ends of the protruding stabilizing members 1.3 of the superconducting conductors A and B are butted together as shown in FIG. 2, and the stabilizing members 1.3 at the abutted portions are joined. When performing this joining, if the stabilizing base material 1.3 is made of metal, etc., brazing with silver solder, solder, etc. is performed using metal brazing or welding, and in the case of ceramic tape, brazing or brazing is performed. A known method such as can be used. Stabilizing member! , 3 are joined together, a recess 5 as shown in FIG. 2 is formed at the joined portion.
次に前記凹部５に溶射ガン６を用いて溶射層を形成して
両超電導導体Ａ、Ｂを接合する。Next, a thermal spray layer is formed in the recess 5 using a thermal spray gun 6, and both superconducting conductors A and B are joined.
前記溶射ガン６は、燃焼ガスとキャリアガスに加えて超
電導体の粉末などをノズルから高速で噴出できように構
成されてなるもので、燃焼ガスの燃焼によりノズルの先
端から溶融状態の粉末を噴射できるようになっている。The thermal spray gun 6 is configured to be able to inject superconductor powder and the like from a nozzle in addition to combustion gas and carrier gas at high speed.The molten powder is injected from the tip of the nozzle by combustion of the combustion gas. It is now possible to do so.
なお、溶射時の雰囲気としては、酸素雰囲気、大気又は
溶射状態の粉末のスピードを上げるために低圧状態で行
う。The atmosphere during thermal spraying is oxygen atmosphere, air, or low pressure to increase the speed of the sprayed powder.
ここで溶射ガン６に供給される粉末は、前記超電導層２
．４を構成する超電導体と同一組成の粉末、あるいは、
その萌駆体扮末が用いられる。これらの粉末を作成する
には、前記へ元素を含有する化合物粉末（酸化物粉末、
炭酸塩粉末、塩化物粉末など）あるいは合金粉末と、Ｂ
元素を含有する化合物粉末あるいは合金粉末と、銅を含
有する粉末（酸化銅粉末など）を所定の組成比になるよ
うに混合して混合粉末を得、この混合粉末を好ましくは
酸素存在雰囲気において、５００〜１０００°Ｃで数分
〜数十時間加熱して仮焼し、面駆体扮末とした後に、好
ましくは酸素存在雰囲気において６００〜ｌ０００℃で
数分〜数十時間焼結したものを粉末化した酸化物超電導
粉末などが用いられる。なお、仮焼粉末を圧密して成形
体とした後に加熱処理を施し、酸化物超電導体のバルク
を製造した後に粉末化して得た酸化物超電導粉末を使用
しても良い。Here, the powder supplied to the thermal spray gun 6 is
．． Powder having the same composition as the superconductor constituting 4, or
Its progenitor disguise is used. To create these powders, compound powders (oxide powders,
carbonate powder, chloride powder, etc.) or alloy powder, and B
A compound powder or alloy powder containing the element and a powder containing copper (copper oxide powder, etc.) are mixed at a predetermined composition ratio to obtain a mixed powder, and this mixed powder is preferably heated in an oxygen-containing atmosphere. After calcining by heating at 500 to 1,000°C for several minutes to several tens of hours to obtain a surface precursor powder, the product is preferably sintered at 600 to 1,000°C for several minutes to several tens of hours in an oxygen atmosphere. Powdered oxide superconducting powder is used. Note that it is also possible to use an oxide superconducting powder obtained by compacting the calcined powder to form a molded body and then subjecting it to heat treatment to produce a bulk of the oxide superconductor and then pulverizing it.
このように得られた超電導粉末を溶射ガン６に供給して
燃焼ガスで溶融させた状態で第２図に示す四部５に吹き
付け、凹部５内で凝固させて堆積させることによって凹
部５を埋めるように溶射層を形成する。次いでこの溶射
層を好ましくは酸素存在雰囲気中において６００〜１０
００℃で数分〜数十時間加熱する熱処理を施して焼結し
、接続用の酸化物超電導層７を形成する。The thus obtained superconducting powder is supplied to the thermal spray gun 6, melted with combustion gas, and sprayed onto the four parts 5 shown in FIG. 2, solidified and deposited in the recess 5, thereby filling the recess 5. A sprayed layer is formed on the surface. This sprayed layer is then preferably heated to a temperature of 600 to 10
A heat treatment is performed at 00° C. for several minutes to several tens of hours to sinter and form the oxide superconducting layer 7 for connection.
凹部５を埋めるように形成された超電導層７は、超電導
層２，４を接合するとともに安定化部材ｌ。A superconducting layer 7 formed to fill the recess 5 joins the superconducting layers 2 and 4 and also serves as a stabilizing member l.
３にも密着する。ここで超電導層７は安定化部材１．３
上に粉末の溶融物を吹き付けた後に熱処理して形成され
ているので、安定化部１１．３と溶射層との界面で原子
の拡散がなされて安定化部材１．３に強く密着する。し
かも超電導層７は超電導粉末の溶融物を凹部５に高速で
吹き付けて形成されるので密度が高いとともに、溶射時
と熱処理時に溶射層と超電導導体Ａ、Ｂの超電導体２．
４との界面で原子の拡散がなされるので超電導層２゜４
．７の相互の間の密着性も良好となる。It also adheres to 3. Here, the superconducting layer 7 is the stabilizing member 1.3
Since it is formed by spraying a powder melt thereon and then heat-treating it, atoms are diffused at the interface between the stabilizing part 11.3 and the sprayed layer, resulting in strong adhesion to the stabilizing member 1.3. Moreover, since the superconducting layer 7 is formed by spraying a melt of superconducting powder into the recesses 5 at high speed, it has a high density, and the superconducting layer 7 and the superconducting conductors 2 of the superconducting conductors A and B are formed during thermal spraying and heat treatment.
Since atoms diffuse at the interface with 4, the superconducting layer 2゜4
．． The adhesion between No. 7 and No. 7 is also good.
従って前記方法で接続した超電導線Ａ、Ｂは接合部分の
強度が十分に高く、接合部分がその他の部分と同等の可
撓性を有する。更にスリーブなどの接続部材を必要とし
ないために接合部分の導体断面積を増加させることなく
超電導導体Ａ、Ｂを接合することができる。また、接合
部分が酸化物超電導層７で形成されるので、通電時に接
合部分に電気抵抗を生じさせることもない。Therefore, the strength of the bonded portion of the superconducting wires A and B connected by the above method is sufficiently high, and the bonded portion has the same flexibility as the other portions. Furthermore, since a connecting member such as a sleeve is not required, the superconducting conductors A and B can be joined without increasing the conductor cross-sectional area of the joining portion. Further, since the bonding portion is formed of the oxide superconducting layer 7, no electrical resistance is generated in the bonding portion when electricity is applied.
なお、酸素ガス雰囲気などで溶射を行い、溶射層に酸素
を十分に供給するならば、Ｙ −Ｂ ａ−Ｃｕ−０系の
酸化物超電導導体を接続する場合などには、より優秀な
超電導特性を発揮する高品質の酸化物超電導体からなる
超電導層７を生成させて接続することができる。また、
酸化物超電導体の組成によっては、溶射を行うのみで良
好な超電導特性を発揮させることができる場合もあるの
で、この場合は溶射後の熱処理を省略することらできる
。Furthermore, if thermal spraying is carried out in an oxygen gas atmosphere and sufficient oxygen is supplied to the thermal sprayed layer, more excellent superconducting properties can be obtained when connecting Y-B a-Cu-0 based oxide superconducting conductors. A superconducting layer 7 made of a high-quality oxide superconductor that exhibits this property can be formed and connected. Also,
Depending on the composition of the oxide superconductor, it may be possible to exhibit good superconducting properties just by thermal spraying, so in this case, heat treatment after thermal spraying can be omitted.
第４図ないし第６図は、この発明の他の例を示すもので
、この例においては、酸化物超電導体からなる芯線ｌＯ
を金属材料などからなるバイブ状の安定化部ＩＩで覆っ
て構成された酸化物超電導導体Ｃと、酸化物超電導体か
らなる芯線１２をバイブ状の安定化部材１３で覆ってな
る酸化物超電導導体Ｉ）を接続−する場合の例を説明す
るためのらのである。FIGS. 4 to 6 show other examples of the present invention, in which core wires made of oxide superconductors lO
An oxide superconducting conductor C constituted by covering a core wire 12 made of an oxide superconductor with a vib-shaped stabilizing member 13 made of a metal material, etc. This is to explain an example of connecting I).
この例の構造の超電導導体Ｃ，Ｄを接続するには、両方
の超電導導体Ｃ、Ｉ）の端部の安定化Ｅ１：材ＩＩ、＋
３を所定の長さ除去して芯線１Ｏ８１２を突出させ、芯
線１０，１２どう（７を突き合わせ、突Ｊ ｙＳ、わせ
部分の周囲に溶射ガン６で溶射層を形成し、その周囲に
ろう付は金属などからなる接合層１４をｔ ｌｉｔする
ことにより安定化部材ｉｉ、ｉ；うを接合して接合を行
う。To connect the superconducting conductors C, D of the structure of this example, the stabilization of the ends of both superconducting conductors C, I) E1: material II, +
3 is removed to a predetermined length to protrude the core wire 10812, the core wires 10 and 12 (7) are butted together, a thermal spray layer is formed around the protruding part with a thermal spray gun 6, and the brazing is done around it. The stabilizing members ii and i are bonded by t lit the bonding layer 14 made of metal or the like.
このような超電導１ｃ、Ｄであっても先の例と同等に十
分な接合強度で電気抵抗を生じさせることなく簡単に接
合４−ることかできる。Even with such superconductors 1c and 1D, bonding can be easily performed with sufficient bonding strength as in the previous example without causing electrical resistance.
なお、溶射層の熱処理は、前記実施例と同等の条件で行
う。また、この例においては、溶射層の形成後直ちに熱
処理を行い、熱処理後に接合層１４を形成して安定化部
材Ｉｔ、１３を接合しても差し支えない。Note that the heat treatment of the sprayed layer is performed under the same conditions as in the previous example. Further, in this example, heat treatment may be performed immediately after the formation of the sprayed layer, and after the heat treatment, the bonding layer 14 may be formed to bond the stabilizing members It, 13.
第７図はこの発明の更に別の例を示ず０ので、この例で
は、芯線状の安定化部材２０の外周に酸化物超電導層２
１を形成Ｉ７てなる酸化物超電導導体Ｅと芯線状の安定
化部材２２の外周に酸化物超電導層２３を形成してなる
酸化物超電導導体Ｆを接合する。Since FIG. 7 does not show yet another example of the present invention, in this example, an oxide superconducting layer 2 is provided on the outer periphery of the core-shaped stabilizing member 20.
An oxide superconducting conductor E formed by forming I7 and an oxide superconducting conductor F formed by forming an oxide superconducting layer 23 on the outer periphery of a core-shaped stabilizing member 22 are joined.
この例においては超電導層２１．２３の端部どうしを除
去（２て芯線状の安定化部材２０．２２を突出さ１」、
安定化部材２０．２２をろう付けなどの手段で接合した
後にその周囲に溶射層を形成し、溶射層を熱処理して超
電導層２１．２３を接合することにより第１の実施例と
同様に接合・［ることかでき、第１実施例と同等の効果
を得ることかできる。In this example, the ends of the superconducting layers 21 and 23 are removed (2 and the core-like stabilizing members 20 and 22 are protruded 1),
After joining the stabilizing members 20.22 by means such as brazing, a sprayed layer is formed around the stabilized members 20.22, and the superconducting layers 21.23 are joined by heat-treating the sprayed layer in the same manner as in the first embodiment. - It is possible to obtain the same effect as the first embodiment.
なお、面述の各実施例においてはテープ状あるいは断面
円形状の超電導導体を接合する場合について説明したが
、この発明は安定化部Ｈに酸化物超電導体を添設してな
る一般構造の超電導導体の接合に利用できることは勿論
である。In addition, in each of the embodiments described above, a case has been described in which superconducting conductors having a tape shape or a circular cross section are bonded. Of course, it can be used for joining conductors.
［発明の効果」
以」−説明したように本発明は、酸化物超電導体とう（
７の間に溶射によって酸化物超電導体を形成して酸化物
超電導層どうしを接合するために、スリーブ管などの接
続部材を用いることなく、導体の断面積を大きくするこ
となく同一の径で接続することができる。また、溶射に
より形成される接続用の酸化物超電導体によって酸化物
超電導体どうしを接合するので接合部分に電気抵抗を生
じることのない完全な接合かできる効果がある。なお、
溶射により形成される接続用の酸化物超電導体は安定化
部材にも密着するので接続用の酸化物超電導体は安定化
部材との密着性ら良好になり、緻密・て強度ら高いので
接合強度の高い接続が容易にで、きるりｊ果かある。[Effects of the Invention] As explained above, the present invention provides an oxide superconductor (
In order to form an oxide superconductor by thermal spraying between 7 and join the oxide superconducting layers, the conductor can be connected with the same diameter without using a connecting member such as a sleeve pipe and without increasing the cross-sectional area of the conductor. can do. Furthermore, since the oxide superconductors are joined together using the oxide superconductor for connection formed by thermal spraying, there is an effect that a complete joint can be achieved without generating electrical resistance at the joint portion. In addition,
The oxide superconductor for connection formed by thermal spraying also adheres closely to the stabilizing member, so the oxide superconductor for connection has good adhesion to the stabilizing member, and is dense and high in strength, so the bonding strength is improved. It is easy to make high connections and there are many benefits.
第１図ないし第３図は、本発明の第１実施例を示ｔらの
で、第１図は安定化部材を突出させた酸化物超電導導体
の端部どう（７を接近させた状態を示す斜視図、第２図
は超電導導体の突き合わせ状態を示す斜視図、第３図は
溶射ガンによる酸化物超電導体の接続状態を示す断面図
、第４図ないし第６図は本発明の第２実施例を示すもの
で、第、１図は酸化物超電導体を突出させた超電導導体
の端部どうｊ７を接近させた状態を示す斜視図、第５図
は超電導導体の端部どうしの突き合わせ状態を示す斜視
図、第６図は接続後の状態を示す斜視図、第７図は本発
明の第３実施例を説明するためのもので、安定化部材を
突出させた酸化物超電導導体どうしを接近さＵ゛た状態
を示す斜視図である１３Ａ 、Ｂ 、Ｃ、Ｄ 、Ｅ 、
Ｆ・・・酸化物超電導導体、１．３．ｌ １，１３，２
０．２２・・・安定化部Ｈ１２，４・・・超電導層（酸
化物超電導体）、５・・・凹部、６・・溶射層、
７・・・超電導層、１０．１２・・・芯線（酸化物超
電導体）、２１．２３・・・酸化物超電導層（酸化物超
電導体）。1 to 3 show a first embodiment of the present invention, so FIG. 1 shows a state in which the end portion (7) of an oxide superconducting conductor with a protruding stabilizing member (7) is brought close to the end portion of the oxide superconducting conductor. FIG. 2 is a perspective view showing a butted state of superconducting conductors, FIG. 3 is a sectional view showing a state of connection of oxide superconductors by a thermal spray gun, and FIGS. 4 to 6 show a second embodiment of the present invention. An example is shown in Fig. 1, which is a perspective view showing a state in which the ends of a superconducting conductor with protruding oxide superconductors are brought close to each other, and Fig. 5 is a perspective view showing a state in which the ends of the superconducting conductor are brought into contact with each other. FIG. 6 is a perspective view showing the state after connection, and FIG. 7 is for explaining the third embodiment of the present invention, in which oxide superconducting conductors with protruding stabilizing members are brought close to each other. 13A, B, C, D, E, which is a perspective view showing the folded state;
F...Oxide superconducting conductor, 1.3. l 1,13,2
0.22... Stabilizing part H12, 4... Superconducting layer (oxide superconductor), 5... Concave portion, 6... Thermal spray layer,
7... Superconducting layer, 10.12... Core wire (oxide superconductor), 21.23... Oxide superconducting layer (oxide superconductor).
Claims (1)
導導体どうしの接続方法において、各超電導導体の端部
から安定化部材と酸化物超電導体のどちらか一方を除去
して他方を突出させ、突出させた部材を突き合わせ、突
き合わせ部分の周囲に溶射ガンを用いて接続用の酸化物
超電導体を溶射して両方の酸化物超電導体を接続するこ
とを特徴とする酸化物超電導導体の接続方法。In a method for connecting oxide superconducting conductors in which a stabilizing member is attached to an oxide superconductor, one of the stabilizing member and the oxide superconductor is removed from the end of each superconducting conductor, and the other is protruded. A connection of oxide superconducting conductors, characterized in that the protruding members are butted together, and an oxide superconductor for connection is sprayed around the abutting portion using a thermal spray gun to connect both oxide superconductors. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63132485A JP2549705B2 (en) | 1988-05-30 | 1988-05-30 | How to connect oxide superconducting conductors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63132485A JP2549705B2 (en) | 1988-05-30 | 1988-05-30 | How to connect oxide superconducting conductors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01302676A true JPH01302676A (en) | 1989-12-06 |
| JP2549705B2 JP2549705B2 (en) | 1996-10-30 |
Family
ID=15082479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63132485A Expired - Lifetime JP2549705B2 (en) | 1988-05-30 | 1988-05-30 | How to connect oxide superconducting conductors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2549705B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5252800A (en) * | 1991-12-05 | 1993-10-12 | General Electric Company | Apparatus for preparing superconducting joints |
| JPH0672165U (en) * | 1993-03-18 | 1994-10-07 | 住友重機械工業株式会社 | Oxide superconducting conductor |
| US5612291A (en) * | 1990-12-08 | 1997-03-18 | Ngk Insulators, Ltd. | Superconductive device for helping shield magnetic field and manufacturing method therefor |
| US6194226B1 (en) | 1991-02-25 | 2001-02-27 | Sumitomo Electric Industries, Ltd. | Junction between wires employing oxide superconductors and joining method therefor |
| EP1877246A2 (en) * | 2005-04-08 | 2008-01-16 | Superpower, Inc. | Joined superconductive articles |
| US8716188B2 (en) | 2010-09-15 | 2014-05-06 | Superpower, Inc. | Structure to reduce electroplated stabilizer content |
-
1988
- 1988-05-30 JP JP63132485A patent/JP2549705B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5612291A (en) * | 1990-12-08 | 1997-03-18 | Ngk Insulators, Ltd. | Superconductive device for helping shield magnetic field and manufacturing method therefor |
| US6194226B1 (en) | 1991-02-25 | 2001-02-27 | Sumitomo Electric Industries, Ltd. | Junction between wires employing oxide superconductors and joining method therefor |
| US5252800A (en) * | 1991-12-05 | 1993-10-12 | General Electric Company | Apparatus for preparing superconducting joints |
| JPH0672165U (en) * | 1993-03-18 | 1994-10-07 | 住友重機械工業株式会社 | Oxide superconducting conductor |
| EP1877246A2 (en) * | 2005-04-08 | 2008-01-16 | Superpower, Inc. | Joined superconductive articles |
| EP1877246A4 (en) * | 2005-04-08 | 2011-11-02 | Superpower Inc | Joined superconductive articles |
| EP1877246B1 (en) | 2005-04-08 | 2016-09-28 | Superpower, Inc. | Joined superconductive articles |
| US8716188B2 (en) | 2010-09-15 | 2014-05-06 | Superpower, Inc. | Structure to reduce electroplated stabilizer content |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2549705B2 (en) | 1996-10-30 |
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