JP2583317B2 - Superconductor with oxide film - Google Patents
Superconductor with oxide filmInfo
- Publication number
- JP2583317B2 JP2583317B2 JP1224918A JP22491889A JP2583317B2 JP 2583317 B2 JP2583317 B2 JP 2583317B2 JP 1224918 A JP1224918 A JP 1224918A JP 22491889 A JP22491889 A JP 22491889A JP 2583317 B2 JP2583317 B2 JP 2583317B2
- Authority
- JP
- Japan
- Prior art keywords
- oxide film
- wire
- superconductor
- diameter
- 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 - Fee Related
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
- Containers, Films, And Cooling For Superconductive Devices (AREA)
- Formation Of Insulating Films (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は表面に酸化被膜を有する超電導体に関するも
のである。Description: TECHNICAL FIELD The present invention relates to a superconductor having an oxide film on a surface.
通常超電導線、特に交流用超電導撚線はその素線間の
交流結合損失を低減するために、素線表面に電気的な絶
縁層を有している。このような絶縁材料としては従来、
エナメル，編組又は表面金属の酸化被膜等がある。Normally, superconducting wires, especially AC superconducting stranded wires, have an electrical insulating layer on the surface of the wires in order to reduce AC coupling loss between the wires. Conventionally, as such an insulating material,
There are enamels, braids or oxide films on the surface metal.
しかしながらエナメルや編組は肉厚なものとなり絶縁
層も含めた全断面積当たりの臨界電流が小さくなるので
適当でないという問題があった。However, there is a problem that the enamel or the braid is not suitable because the thickness becomes thick and the critical current per total sectional area including the insulating layer becomes small.
また酸化被膜は１μｍ程度の薄いものであるが、交流
用超電導線の表面金属は主にCu−30wt％Ni等の酸化され
にくい金属であるため直接酸化してもその被膜は密着性
が悪く、剥離し易いものであった。Although the oxide film is as thin as about 1 μm, the surface metal of the AC superconducting wire is mainly a hardly oxidizable metal such as Cu-30 wt% Ni, so even if directly oxidized, the film has poor adhesion. It was easy to peel off.
即ち上記のような絶縁層としては薄肉の酸化被膜の方
がよりベターであるが、例えばCu−10％Ni又はCu−30％
Ni等の酸化されにくい金属をマトリックス表面とした超
電導線の表面に0.1〜５μｍの厚さに酸化被膜を形成す
るには、現在このマトリックス表面の金属を陽極酸化法
や化学反応法等で直接酸化する方法が採られている。That is, as the insulating layer as described above, a thin oxide film is better, but for example, Cu-10% Ni or Cu-30%
To form an oxide film with a thickness of 0.1 to 5 μm on the surface of a superconducting wire with a matrix surface made of a metal that is difficult to oxidize such as Ni, the metal on the matrix surface is currently directly oxidized by anodic oxidation or chemical reaction. The method is adopted.
しかしながらこのような方法で形成された酸化被膜は
マトリックス表面との密着性が悪く、例えば自己径曲げ
で剥離してしまうので問題であった。However, the oxide film formed by such a method has a problem because it has poor adhesion to the matrix surface, and peels off by, for example, self-radial bending.
本発明はこれに鑑み種々検討の結果、密着性の高い酸
化被膜を形成した超電導体を提供するものである。The present invention has been made in view of the above and, as a result of various studies, provides a superconductor having an oxide film having high adhesion.
即ち本発明は、Cu−Ni合金をマトリックス表面とする
超電導体において、該マトリックス表面に金属的に接合
したCu層を形成し、そのCu層の表面又は全体が酸化され
ていることを特徴とするものである。That is, the present invention is characterized in that in a superconductor having a Cu-Ni alloy as a matrix surface, a Cu layer metallically bonded to the matrix surface is formed, and the surface or the whole of the Cu layer is oxidized. Things.
このようにマトリックス表面に金属的に接合したCu層
を形成する方法としては、通常の金属メッキ法が簡便で
あり、そのCu層の厚さとしては0.5μｍ以上が適当であ
る。そしてそのメッキ表面または全体を電気的または化
学的な方法で酸化せしめ、少なくとも0.1μｍ以上の厚
さの酸化被膜を形成するのが良い。As a method of forming a Cu layer metallically bonded on the matrix surface as described above, a usual metal plating method is simple, and the thickness of the Cu layer is suitably 0.5 μm or more. Then, the plating surface or the whole is oxidized by an electric or chemical method to form an oxide film having a thickness of at least 0.1 μm or more.
またこのような本発明線材の表面に、さらに従来のエ
ナメル被覆等を施すことも可能であり、このときは撚線
加工によりエナメル被覆が損傷を受けてもその下に酸化
被膜があるため素線同士は接触せず、交流損失は低減さ
れることになる。It is also possible to further apply a conventional enamel coating or the like to the surface of such a wire of the present invention. In this case, even if the enamel coating is damaged by the stranded wire processing, there is an oxide coating thereunder, so that the strand is They do not contact each other, and the AC loss is reduced.
次に本発明の実施例について説明する。 Next, examples of the present invention will be described.
＜実施例１＞ 線径0.47mmでCu−10wt％Ni合金をマトリックス表面と
する交流用超電導線の表面にそれぞれ1,1.5及び２μｍ
の厚さのCuメッキを施し、次にこれら超電導線に対して
化学反応によりそれぞれ0.5〜２μｍの厚さに酸化被膜
を形成した。<Example 1> The surface of an AC superconducting wire having a wire diameter of 0.47 mm and a Cu-10wt% Ni alloy as a matrix surface was 1,1.5 and 2 μm, respectively.
Then, an oxide film was formed on each of these superconducting wires to a thickness of 0.5 to 2 μm by a chemical reaction.
これら本発明の超電導線に対しJIS 3003 9−２による
捩じり試験、直径0.47mmから厚さ0.35mmへの圧延試験及
び自己径曲げ試験をそれぞれ実施した。その結果捩じり
試験では80回転しても酸化被膜の剥がれは全く認められ
なかった。同様に圧延試験及び自己径曲げ試験において
も被膜の剥がれは皆無であった。These superconducting wires of the present invention were subjected to a torsion test according to JIS 30039-2, a rolling test from a diameter of 0.47 mm to a thickness of 0.35 mm, and a self-diameter bending test. As a result, in the torsion test, no peeling of the oxide film was observed even after 80 rotations. Similarly, there was no peeling of the coating film in the rolling test and the self-diameter bending test.
これに対し、Cu−10wt％Ni合金のマトリックス表面に
直接酸化被膜を形成した上記と同一材で同一径の従来の
交流用超電導線では、上記の試験を施した結果、いずれ
の試験においても酸化被膜は剥離してしまった。In contrast, a conventional AC superconducting wire with the same material and the same diameter as the above, which had an oxide film formed directly on the matrix surface of a Cu-10wt% Ni alloy, was subjected to the above test. The coating has peeled off.
＜実施例２＞ 第１図に示すように直径0.47mmの上記本発明超電導線
（１）に７本同芯撚り加工を施して外径1.4mmの撚線
（２）とし、さらにこの撚線（２）を素線として第２図
に示すように断面寸法2.7mm×9.4mm,撚りピッチ95mmか
つ充填率80％で15本成形撚線加工を実施したが酸化被膜
の剥離はなかった。<Example 2> As shown in FIG. 1, the above-described superconducting wire (1) having a diameter of 0.47 mm was subjected to concentric twisting to form a stranded wire (2) having an outer diameter of 1.4 mm. As shown in FIG. 2, using (2) as a strand, 15 strands were formed with a cross-sectional dimension of 2.7 mm × 9.4 mm, a twist pitch of 95 mm, and a filling factor of 80%, but no oxide film was peeled off.
＜実施例３＞ 直径0.47mmの本発明超電導線を断面寸法が0.2mm×0.4
mmの平角に伸線したが、酸化被膜は剥離しなかった。Example 3 A superconducting wire of the present invention having a diameter of 0.47 mm was cross-sectionally dimensioned to 0.2 mm × 0.4
The wire was drawn in a rectangular shape of mm, but the oxide film did not peel off.
＜実施例４＞ 第３図に示すように直径0.47mmの本発明超電導線
（１）と実施例３の平角超電導線（３）とをスムースボ
ディに加工して直径1.3mmの７本撚線としたが、酸化被
膜の剥離は見られなかった。<Example 4> As shown in Fig. 3, a superconducting wire (1) of the present invention having a diameter of 0.47mm and a rectangular superconducting wire (3) of Example 3 were processed into a smooth body to form a seven-stranded wire having a diameter of 1.3mm. However, no peeling of the oxide film was observed.
＜実施例５＞ 第４図に示すように直径0.47mmの本発明超電導線
（１）を断面寸法0.7mm×5.4mmに23本成形撚加工しても
酸化被膜の剥離はなかった。<Example 5> As shown in Fig. 4, even when 23 superconducting wires (1) of the present invention having a diameter of 0.47 mm were formed and twisted into a cross-sectional dimension of 0.7 mm x 5.4 mm, no oxide film was peeled off.
＜実施例６＞ 直径0.47mmの本発明超電導線にエナメル被膜を施し、
この線材を直径0.43mmに伸線したが、酸化被膜には剥離
が認められなかった。Example 6 An enamel coating was applied to a superconducting wire of the present invention having a diameter of 0.47 mm,
This wire was drawn to a diameter of 0.43 mm, but no peeling was observed in the oxide film.
このように本発明による酸化被膜は密着性が高く、酸
化被膜形成後に線材に伸線，圧延，撚線等の塑性加工を
施しても剥離することがない等工業上顕著な効果を奏す
る。As described above, the oxide film according to the present invention has high adhesiveness, and has an industrially remarkable effect such that it does not peel off even if plastic processing such as wire drawing, rolling, and stranded wire is performed on the wire after the oxide film is formed.
第１図は線材を７本同芯撚線を示す断面図、第２図は７
本撚線を15本成形撚線したものを示す断面図、第３図は
７本撚線をスムースボディに加工したものを示す断面
図、第４図は23本成形撚線を示す断面図である。 １……超電導線 ２……撚線 ３……平角超電導線1 is a sectional view showing seven concentric stranded wires, and FIG.
FIG. 3 is a cross-sectional view showing a 15-strand formed stranded wire, FIG. 3 is a cross-sectional view showing a 7-strand processed into a smooth body, and FIG. 4 is a cross-sectional view showing a 23-stranded stranded wire. is there. 1 ... superconducting wire 2 ... twisted wire 3 ... flat rectangular superconducting wire
Claims (1)
導体において、該マトリックス表面に金属的に接合した
Cu層を形成し、そのCu層の表面又は全体が酸化されてい
ることを特徴とする酸化被膜を有する超電導体。1. A superconductor having a Cu-Ni alloy as a matrix surface, which is metallically bonded to the matrix surface.
A superconductor having an oxide film, wherein a Cu layer is formed and the surface or the entire surface of the Cu layer is oxidized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1224918A JP2583317B2 (en) | 1989-08-31 | 1989-08-31 | Superconductor with oxide film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1224918A JP2583317B2 (en) | 1989-08-31 | 1989-08-31 | Superconductor with oxide film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0388217A JPH0388217A (en) | 1991-04-12 |
| JP2583317B2 true JP2583317B2 (en) | 1997-02-19 |
Family
ID=16821206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1224918A Expired - Fee Related JP2583317B2 (en) | 1989-08-31 | 1989-08-31 | Superconductor with oxide film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2583317B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07134918A (en) * | 1993-11-09 | 1995-05-23 | Furukawa Electric Co Ltd:The | Superconducting twisted wire and manufacture thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6481115A (en) * | 1987-09-21 | 1989-03-27 | Japan Atomic Energy Res Inst | Superconductor |
| JP3039215U (en) * | 1995-12-28 | 1997-07-15 | ソープ メング | Golf bag |
-
1989
- 1989-08-31 JP JP1224918A patent/JP2583317B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0388217A (en) | 1991-04-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |