JP3070969B2 - Superconducting wire manufacturing method - Google Patents
Superconducting wire manufacturing methodInfo
- Publication number
- JP3070969B2 JP3070969B2 JP3110683A JP11068391A JP3070969B2 JP 3070969 B2 JP3070969 B2 JP 3070969B2 JP 3110683 A JP3110683 A JP 3110683A JP 11068391 A JP11068391 A JP 11068391A JP 3070969 B2 JP3070969 B2 JP 3070969B2
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- Japan
- Prior art keywords
- filament
- superconducting wire
- substrate
- intermediates
- cross
- 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.)
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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
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- Wire Processing (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Description
【０００１】[0001]
【産業上の利用分野】請求項１及び請求項２の発明は、
Ｎｂ3Ｓｎ系化合物からなるフィラメントを有し、超電
導マグネットなどに使用されるＮｂ3Ｓｎ系の超電導線
の製造方法に関するものである。The invention of claims 1 and 2
The present invention relates to a method for producing an Nb 3 Sn-based superconducting wire having a filament made of an Nb 3 Sn-based compound and used for a superconducting magnet or the like.
【０００２】[0002]
【従来の技術】図３ないし図５は例えば特開昭５７−４
９１２１号公報に示されたものと同様の従来のＮｂ3Ｓ
ｎ化合物超電導線の製造方法を工程順に示す横断面図で
ある。熱処理後の状態を示す図５において、１はＮｂ3
Ｓｎフィラメント、２はＮｂ3Ｓｎフィラメント１間に
介在しているＣｕ−Ｓｎ合金である。また、多くの場
合、図５の超電導線の外周には、Ｔａ又はＮｂからなる
バリヤを介して安定化銅が設けられるが、ここでは省略
した。2. Description of the Related Art FIGS.
Conventional Nb 3 S similar to that shown in JP-A-9121
It is a cross-sectional view which shows the manufacturing method of an n-compound superconducting wire in a process order. In FIG. 5 showing the state after the heat treatment, 1 is Nb 3
The Sn filament 2 is a Cu—Sn alloy interposed between the Nb 3 Sn filaments 1. In many cases, stabilizing copper is provided on the outer periphery of the superconducting wire of FIG. 5 via a barrier made of Ta or Nb, but is omitted here.
【０００３】次に、従来のＮｂ3Ｓｎ化合物超電導線の
製造方法について説明する。まず、図３に示すように、
適切な太さ，肉厚のＣｕパイプ３の中にＮｂ棒４を挿入
し、これに縮径加工を施してＣｕ−Ｎｂ単心棒を製造す
る。次に、一定の長さに切断した多数のＣｕ−Ｎｂ単心
棒と、別に準備したＣｕ棒（図示せず）とを、別のＣｕ
パイプ（図示せず）の中に整列して組み合わせて複合棒
とし、この複合棒に縮径加工（断面縮小加工）を施す。
この縮径加工の途中で、Ｃｕの部分に切削加工などによ
り貫通孔を設け、この貫通孔に棒状のＳｎ基体５を入れ
る。そして、再び縮径加工を施し、図４に示すように、
所定の径寸法に仕上げる。これにより、Ｓｎ基体５，フ
ィラメント中間体である多数本のＮｂフィラメント６及
びＣｕマトリックス７を有する複合体８が形成される。
この熱処理前の複合体８は、図６に示すように、半径方
向内側の内層及び半径方向外側の外層の断面が同じよう
になっている。Next, a method of manufacturing a conventional Nb 3 Sn compound superconducting wire will be described. First, as shown in FIG.
An Nb rod 4 is inserted into a Cu pipe 3 having an appropriate thickness and thickness, and the diameter of the Nb rod 4 is reduced to produce a Cu-Nb single core rod. Next, a large number of Cu-Nb single rods cut to a certain length and a separately prepared Cu rod (not shown) were combined with another Cu rod.
A composite rod is arranged and assembled in a pipe (not shown), and the composite rod is subjected to diameter reduction processing (section reduction processing).
In the course of this diameter reduction processing, a through-hole is formed in the Cu portion by cutting or the like, and the rod-shaped Sn base 5 is inserted into this through-hole. Then, diameter reduction processing is performed again, and as shown in FIG.
Finish to the specified diameter. As a result, a composite 8 having the Sn base 5, a large number of Nb filaments 6, which are filament intermediates, and the Cu matrix 7 is formed.
As shown in FIG. 6, the composite 8 before the heat treatment has the same cross section of the inner layer on the radially inner side and the outer layer on the radially outer side.
【０００４】この後、複合体８に対して熱処理を行うこ
とにより、Ｓｎ基体５が拡散し、Ｎｂフィラメント６と
反応して多数本の超電導フィラメント、即ちＮｂ3Ｓｎ
フィラメント１が形成される。また、Ｓｎ基体５の拡散
により、Ｃｕマトリックス７はＣｕ−Ｓｎ合金２とな
る。このようにして、Ｎｂ3Ｓｎ化合物超電導線が製造
される。Thereafter, a heat treatment is performed on the composite 8 so that the Sn substrate 5 diffuses and reacts with the Nb filament 6 to form a large number of superconducting filaments, ie, Nb 3 Sn.
A filament 1 is formed. Further, the Cu matrix 7 becomes the Cu—Sn alloy 2 due to the diffusion of the Sn base 5. Thus, an Nb 3 Sn compound superconducting wire is manufactured.
【０００５】このようなＮｂ3Ｓｎ化合物超電導線は、
Ｎｂ3Ｓｎ化合物の高融点金属成分であるＮｂ及び低融
点金属成分であるＣｕ，Ｓｎなど、総ての複合体構成材
が可塑性に富んでいるため、縮径加工が容易であり、量
産性及び製造信頼性に優れている。[0005] Such an Nb 3 Sn compound superconducting wire is
Since all the composite components such as Nb, which is a high melting point metal component of the Nb 3 Sn compound, and Cu and Sn, which are low melting point metal components, are rich in plasticity, diameter reduction processing is easy, and mass productivity and mass production are improved. Excellent manufacturing reliability.
【０００６】[0006]
【発明が解決しようとする課題】上記のように構成され
た従来のＮｂ3Ｓｎ化合物超電導線においては、臨界電
流特性を向上させるために、Ｎｂが占める割合を高くし
ているので、図６に拡大して示したように、複合体８で
Ｎｂフィラメント６同志が互いに近接している。このよ
うな状態で熱処理を行うと、特にＳｎ基体５に近い内層
では、隣接するＮｂ3Ｓｎフィラメント１が互いにつな
がり、Ｎｂ3Ｓｎフィラメント１の断面積が大きくなっ
てしまうことがある。Ｎｂ3Ｓｎフィラメント１の断面
積が大きくなった場合、直流的使用状態においてその特
性を十分に発揮できても、交流電流を流したり、変動磁
界中で通電したりしたときに、ヒステリシス交流損失が
増大して電力損失が多大なものになってしまうという問
題点があった。In the conventional Nb 3 Sn compound superconducting wire constructed as described above, the proportion occupied by Nb is increased in order to improve the critical current characteristics. As shown in an enlarged manner, in the composite 8, the Nb filaments 6 are close to each other. When the heat treatment is performed in such a state, the Nb 3 Sn filaments 1 adjacent to each other may be connected to each other in an inner layer close to the Sn base 5, and the cross-sectional area of the Nb 3 Sn filaments 1 may be increased. When the cross-sectional area of the Nb 3 Sn filament 1 becomes large, even when its characteristics can be sufficiently exhibited in a DC use condition, the hysteresis AC loss is reduced when an AC current is passed or a current is passed in a fluctuating magnetic field. There is a problem that the power loss increases and the power loss becomes large.
【０００７】請求項１及び請求項２の発明は、上記のよ
うな問題点を解決することを課題としてなされたもの
で、ヒステリシス交流損失や臨界電流特性などのＮｂ3
Ｓｎ系超電導線の電気的特性を向上させることができる
超電導線の製造方法を得ることを目的とする。SUMMARY OF THE INVENTION The first and second aspects of the present invention have been made to solve the above problems, and include Nb 3, such as hysteresis AC loss and critical current characteristics.
An object of the present invention is to provide a method for manufacturing a superconducting wire that can improve the electrical characteristics of a Sn-based superconducting wire.
【０００８】[0008]
【課題を解決するための手段】請求項１の発明に係る超
電導線の製造方法は、基体に近い位置に配置されるフィ
ラメント中間体間の離隔距離を、基体から遠い位置に配
置されるフィラメント中間体間の離隔距離よりも長くす
るものである。請求項２の発明に係る超電導線の製造方
法は、フィラメント中間体の横断面形状を六角形にする
ものである。According to a first aspect of the present invention, there is provided a method of manufacturing a superconducting wire, wherein a distance between a filament intermediate member disposed at a position close to a substrate and a filament intermediate member disposed at a position distant from the substrate is increased. It is to be longer than the separation distance between the bodies. According to a second aspect of the present invention, there is provided a method for manufacturing a superconducting wire, wherein a cross-sectional shape of a filament intermediate is hexagonal.
【０００９】[0009]
【作用】請求項１の発明においては、基体に近い位置に
配置されたフィラメント中間体間の離隔距離を長くする
ことにより、隣接するフィラメントがつながるのを防止
する。請求項２の発明においては、フィラメント中間体
の横断面形状を六角形にすることにより、フィラメント
中間体間の離隔距離を短くすることなく、フィラメント
の表面積及び断面積を大きくする。According to the first aspect of the present invention, adjacent filaments are prevented from being connected by increasing the separation distance between the filament intermediates arranged near the base. In the second aspect of the present invention, the surface area and the cross-sectional area of the filament are increased without reducing the separation distance between the filament intermediates by making the cross-sectional shape of the filament intermediate a hexagon.
【００１０】[0010]
【実施例】以下、請求項１の発明の一実施例について説
明する。まず、図３と同様に、直径２０ｍｍのＮｂ棒４
を外径３１ｍｍ，内径２１ｍｍのＣｕパイプ３中に挿入
して引抜加工を行い、対辺距離６.０ｍｍの六角単心棒
に仕上げた。また、同様のＮｂ棒４を外径３６ｍｍ，内
径２１ｍｍのＣｕパイプ３中に挿入して引抜加工を行
い、対辺距離６.０ｍｍの六角単心棒に仕上げた。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. First, similarly to FIG.
Was inserted into a Cu pipe 3 having an outer diameter of 31 mm and an inner diameter of 21 mm to perform a drawing process, thereby completing a hexagonal single-rod having a distance of 6.0 mm across sides. Further, a similar Nb rod 4 was inserted into a Cu pipe 3 having an outer diameter of 36 mm and an inner diameter of 21 mm to perform a drawing process, thereby completing a hexagonal single-core rod having a distance of opposite side of 6.0 mm.
【００１１】これらの六角単心棒及び別のＣｕパイプ，
Ｃｕ棒を使用して、試作材Ａ及び試作材Ｂの２種類の複
合棒を試作した。試作材Ａは、外径３１ｍｍのＣｕパイ
プを用いて加工した六角単心棒を使用したものである。
試作材Ｂは、外径３１ｍｍのＣｕパイプを用いて加工し
た六角単心棒を外層に、外径３６ｍｍのＣｕパイプを用
いて加工した六角単心棒を内層に、それぞれ配置したも
のである。従って、試作材Ｂの内層では、外層に比べ
て、Ｎｂが細くＣｕが厚くなっている。These hexagonal single rods and another Cu pipe,
Two types of composite rods, trial material A and trial material B, were prototyped using Cu rods. Prototype material A uses a hexagonal single core rod processed using a Cu pipe having an outer diameter of 31 mm.
Prototype material B has a hexagonal single core rod processed using a Cu pipe with an outer diameter of 31 mm disposed on the outer layer, and a hexagonal single core rod processed using a Cu pipe with an outer diameter of 36 mm disposed on the inner layer. Therefore, in the inner layer of the prototype material B, Nb is thinner and Cu is thicker than the outer layer.
【００１２】この後、組み立てた各複合棒に縮径加工を
施した。また、縮径加工の途中に、複合棒の横断面のＣ
ｕからなる部分に縦貫通孔を設け、その中に棒状のＳｎ
基体５を入れて、フィラメント中間体であるＮｂフィラ
メント６の直径が外層で３μｍになるまで、再び縮径加
工を施した。このようにして形成された各複合体８の全
体的な横断面形状は、図４に示したものとほぼ同様であ
る。Thereafter, the assembled composite rods were subjected to diameter reduction processing. Also, during the diameter reduction processing, C of the cross section of the composite rod is
u is provided with a vertical through hole, and a rod-shaped Sn
The substrate 5 was placed, and the diameter was reduced again until the diameter of the Nb filament 6 as the filament intermediate became 3 μm in the outer layer. The overall cross-sectional shape of each composite 8 thus formed is substantially the same as that shown in FIG.
【００１３】ここで、試作材Ａの横断面を拡大すると、
従来例の図６と同様に、内層及び外層の断面形状が同じ
になっている。一方、試作材Ｂの横断面を拡大すると、
図１に示すように、Ｓｎ基体５に近い位置、即ち内層の
Ｎｂフィラメント６の直径が、Ｓｎ基体５から遠い位
置、即ち外層のＮｂフィラメント６の直径よりも小さく
なっており、Ｎｂフィラメント６間のＣｕマトリックス
７の厚さは内層で厚くなっている。Here, when the cross section of the trial material A is enlarged,
Similar to FIG. 6 of the conventional example, the cross-sectional shapes of the inner layer and the outer layer are the same. On the other hand, when the cross section of the trial material B is enlarged,
As shown in FIG. 1, the position near the Sn substrate 5, that is, the diameter of the inner layer Nb filament 6 is smaller than the position far from the Sn substrate 5, that is, the diameter of the outer layer Nb filament 6. Is thicker in the inner layer.
【００１４】次に、これらの試作材Ａ，Ｂからそれぞれ
切り出した短い試料に、７５０℃で４０時間のＮｂ3Ｓ
ｎ相生成熱処理を同時に施した。この結果、試作材Ａか
らの試料では、熱処理後のフィラメント、即ちＮｂ3Ｓ
ｎフィラメント１（図５）にところどころつながりが見
られた。これは、内層でのＳｎ濃度が高いことが主な原
因と考えられる。一方、試作材Ｂからの試料では、Ｎｂ
3Ｓｎフィラメント１のつながりは、全く認められなか
った。従って、ヒステリシス交流損失は、当然試作材Ｂ
の試料のほうが小さくなった。Next, Nb 3 S at 750 ° C. for 40 hours was added to short samples cut out from these trial materials A and B, respectively.
An n-phase generation heat treatment was performed simultaneously. As a result, in the sample from prototype material A, the filament after heat treatment, that is, Nb 3 S
Some connections were found in n-filament 1 (FIG. 5). This is mainly because the Sn concentration in the inner layer is high. On the other hand, in the sample from prototype material B, Nb
No connection of 3 Sn filament 1 was observed at all. Therefore, the hysteresis AC loss is, of course,
Sample became smaller.
【００１５】１２Ｔの臨界電流（密度）特性は、試作材
Ｂの試料では、試作材Ａの試料より４％の減少を示し
た。また、外層においても内層のごとくＣｕマトリック
ス７の肉厚を厚くすると、推定で約１０％の臨界電流密
度の減少が見込まれることになる。このため、内層での
みＣｕマトリックス７の肉厚を厚くし、Ｎｂフィラメン
ト６の離隔距離を長くする方が好ましい。The critical current (density) characteristics of 12T showed a 4% decrease in the sample of the trial material B compared to the sample of the trial material A. Also, when the thickness of the Cu matrix 7 is increased in the outer layer as in the inner layer, the critical current density is estimated to be reduced by about 10%. For this reason, it is preferable to increase the thickness of the Cu matrix 7 only in the inner layer and to increase the separation distance between the Nb filaments 6.
【００１６】なお、上記実施例の試作材Ｂでは内層，外
層のＮｂフィラメント６の横断面形状をほぼ円形とした
が、例えば六角形としてもよい。特に、内層のＮｂフィ
ラメント６の横断面形状を六角形にすることにより、断
面積を小さくすることなく、即ち同一断面積のまま、離
隔距離を長くすることができ、従って臨界電流特性を低
下させることなく、ヒステリシス交流損失を低減するこ
ともできる。また、上記実施例の試作材ＢではＮｂフィ
ラメント６の径を外層と内層との２区域に分けて変えた
が、複合体８を３区域以上に分けて、それぞれの区域に
異なるフィラメント中間体を配置してもよい。In the trial material B of the above embodiment, the cross section of the inner layer and the outer layer of the Nb filament 6 is substantially circular, but may be hexagonal, for example. In particular, by making the cross-sectional shape of the inner layer Nb filament 6 hexagonal, the separation distance can be increased without reducing the cross-sectional area, that is, while keeping the same cross-sectional area, and thus the critical current characteristics are reduced. Without reducing the hysteresis AC loss. Further, in the trial material B of the above embodiment, the diameter of the Nb filament 6 was changed by dividing the outer layer and the inner layer into two sections. However, the composite 8 was divided into three or more sections, and a different filament intermediate was used in each section. It may be arranged.
【００１７】次に、請求項２の発明の一実施例について
説明する。対辺距離１９ｍｍのＮｂ六角棒（図示せず）
を、外径２９ｍｍ，内径２１ｍｍのＣｕパイプ３に挿入
して引き抜き加工を行い、対辺距離６.０ｍｍの六角単
心棒に仕上げた。次に、一定の長さに切断した多数の六
角単心棒及び別のＣｕパイプ，Ｃｕ棒を使用して、複合
棒を組み立てた。この後、従来と同様に、縮径加工を施
し、横断面のＣｕの部分に縦貫通孔を設けてＳｎ基材５
を入れた。そして、Ｎｂフィラメント６が対辺距離３μ
ｍの六角形になるまで、再度縮径加工を施した。Next, one embodiment of the second aspect of the present invention will be described. Nb hexagonal bar with 19 mm acrossside distance (not shown)
Was inserted into a Cu pipe 3 having an outer diameter of 29 mm and an inner diameter of 21 mm to perform a drawing process, thereby completing a hexagonal single-core rod having a distance to the opposite side of 6.0 mm. Next, a composite rod was assembled using a number of hexagonal single rods cut to a certain length and another Cu pipe and Cu rod. Thereafter, as in the conventional case, diameter reduction processing is performed, and a vertical through-hole is provided in the Cu portion of the cross section to form the Sn base material 5.
Was put. Then, the Nb filament 6 has an opposite side distance of 3 μm.
The diameter was reduced again until a hexagon of m was obtained.
【００１８】このときの横断面拡大図を図２に示す。Ｎ
ｂフィラメント６間のＣｕマトリックス７の厚さは、第
１実施例の試作材Ａとほぼ同じである。また、Ｎｂフィ
ラメント６の形状，寸法は、第１実施例の試作材Ａで直
径３.０μｍの近似円形であるのに対して、対辺寸法３.
０μｍの六角形になっている。FIG. 2 is an enlarged cross-sectional view at this time. N
The thickness of the Cu matrix 7 between the b filaments 6 is almost the same as that of the trial material A of the first embodiment. The shape and size of the Nb filament 6 are approximately circular with a diameter of 3.0 μm in the trial material A of the first embodiment, whereas the opposite side size is 3.0.
It is a hexagon of 0 μm.
【００１９】この後、第１実施例と同様、短尺の試料に
対して７５０℃で４０時間のＮｂ3Ｓｎ生成熱処理を施
した。この結果、内層でところどころＮｂ3Ｓｎフィラ
メント１のつながりが見られるものの、１２Ｔ臨界電流
特性は、第１実施例の試作材Ａの試料に比べて、５％も
の上昇が見られた。これは、Ｎｂフィラメント６の表面
積及び断面積の増加による効果と考えられる。このよう
に、複合体８に横断面形状が六角形のＮｂフィラメント
６を配置することにより、Ｎｂフィラメント６間の離隔
距離を短くすることなく、Ｎｂ3Ｓｎフィラメント１の
表面積及び断面積が大きくなり、従ってヒステリシス交
流損失を増大させることなく、臨界電流特性を向上させ
られる。Thereafter, similarly to the first embodiment, the short sample was subjected to Nb 3 Sn generation heat treatment at 750 ° C. for 40 hours. As a result, although the connection of the Nb 3 Sn filaments 1 was observed in some places in the inner layer, the 12T critical current characteristics showed an increase of as much as 5% as compared with the sample of the trial material A of the first embodiment. This is considered to be an effect due to an increase in the surface area and cross-sectional area of the Nb filament 6. Thus, by arranging the Nb filaments 6 having a hexagonal cross section in the composite 8, the surface area and the cross-sectional area of the Nb 3 Sn filament 1 can be increased without reducing the separation distance between the Nb filaments 6. Therefore, the critical current characteristics can be improved without increasing the hysteresis AC loss.
【００２０】なお、上記請求項１及び請求項２の発明の
実施例ではフィラメント中間体としてＮｂフィラメント
６を示したが、例えばＮｂＴｉやＮｂＺｒなど、Ｎｂを
主成分とする合金からなるものであってもよい。また、
同様に、基体はＳｎＴｉやＳｎＩｎなどの合金からなる
ものでもよく、マトリックスはＣｕＴｉなどの合金から
なっていてもよい。また、上記各発明の実施例ではＳｎ
基体５が１本の縦貫通孔にのみ配置されている複合体８
を示したが、複数本の縦貫通孔を設け、それぞれに基体
を配置してもよい。[0020] In the embodiment of the invention described in claims 1 and 2 showed Nb filaments 6 as filaments intermediates, such as NbTi or NBZ r, be those made of an alloy mainly composed of Nb You may. Also,
Similarly, the substrate may be made of an alloy such as SnTi or SnIn, and the matrix may be made of an alloy such as CuTi. In each of the above embodiments, Sn is used.
Composite body 8 in which base member 5 is arranged only in one vertical through hole
However, a plurality of vertical through holes may be provided, and a base may be arranged in each of the vertical through holes.
【００２１】[0021]
【発明の効果】以上説明したように、請求項１の発明の
超電導線の製造方法は、基体に近い位置に配置されるフ
ィラメント中間体間の離隔距離を、基体から遠い位置に
配置されるフィラメント中間体間の離隔距離よりも長く
するようにしたので、熱処理の後に隣接するフィラメン
トがつながるのを防止することができ、これによりヒス
テリシス交流損失を低減することができ、従って電力損
失を抑えることができ、また臨界電流特性の低下は最小
限に留どめることができ、この結果Ｎｂ3Ｓｎ系超電導
線の電気的特性を向上させることができ、このＮｂ3Ｓ
ｎ系超電導線を使用する超電導マグネットなどの性能を
向上させることができるという効果を奏する。また、請
求項２の発明に係る超電導線の製造方法は、フィラメン
ト中間体の横断面形状を六角形にしたので、フィラメン
ト中間体間の離隔距離を短くすることなく、フィラメン
トの表面積及び断面積を大きくすることができ、これに
よりヒステリシス交流損失を大きくすることなく、臨界
電流特性を向上させることができ、この結果Ｎｂ3Ｓｎ
系超電導線の電気的特性を向上させることができ、この
Ｎｂ3Ｓｎ系超電導線を使用する超電導マグネットなど
の性能を向上させることができるという効果を奏する。As described above, in the method for manufacturing a superconducting wire according to the first aspect of the present invention, the separation distance between the filament intermediates arranged at a position close to the substrate and the filament arranged at a position distant from the substrate is increased. The separation distance between the intermediates is longer than the distance between the intermediates, so that it is possible to prevent the adjacent filaments from being connected after the heat treatment, thereby reducing the hysteresis AC loss, and thus reducing the power loss. And the decrease in critical current characteristics can be kept to a minimum. As a result, the electrical characteristics of the Nb 3 Sn-based superconducting wire can be improved, and the Nb 3 S
This has the effect that the performance of a superconducting magnet or the like using an n-based superconducting wire can be improved. In the method for manufacturing a superconducting wire according to the second aspect of the present invention, since the cross-sectional shape of the filament intermediate is made hexagonal, the surface area and the cross-sectional area of the filament can be reduced without reducing the separation distance between the filament intermediates. The critical current characteristics can be improved without increasing the hysteresis AC loss, and as a result, Nb 3 Sn
The electrical characteristics of the superconducting wire can be improved, and the performance of a superconducting magnet or the like using the Nb 3 Sn superconducting wire can be improved.
【図１】請求項１の発明の一実施例による複合体の横断
面を内層と外層とで比較して示す拡大断面図である。FIG. 1 is an enlarged cross-sectional view showing a cross section of a composite according to an embodiment of the present invention, comparing an inner layer and an outer layer.
【図２】請求項２の発明の一実施例による複合体の横断
面を内層と外層とで比較して示す拡大断面図である。FIG. 2 is an enlarged cross-sectional view showing a cross section of a composite according to an embodiment of the present invention in comparison between an inner layer and an outer layer.
【図３】従来のＮｂ3Ｓｎ系超電導線の製造途中の状態
を示すＣｕ−Ｎｂ単心棒の断面図である。FIG. 3 is a cross-sectional view of a Cu-Nb single-core rod showing a state in the process of manufacturing a conventional Nb 3 Sn-based superconducting wire.
【図４】従来のＮｂ3Ｓｎ系超電導線の製造途中の状態
を示す複合体の断面図である。FIG. 4 is a cross-sectional view of a composite showing a state in which a conventional Nb 3 Sn-based superconducting wire is being manufactured.
【図５】従来のＮｂ3Ｓｎ系超電導線の熱処理後の状態
を示す断面図である。FIG. 5 is a cross-sectional view showing a state after heat treatment of a conventional Nb 3 Sn-based superconducting wire.
【図６】従来の製造方法による複合体の横断面を内層と
外層とで比較して示す拡大断面図である。FIG. 6 is an enlarged cross-sectional view showing a cross section of a composite according to a conventional manufacturing method in comparison between an inner layer and an outer layer.
１ Ｎｂ3Ｓｎフィラメント（フィラメント） ５ Ｓｎ基体（基体） ６ Ｎｂフィラメント（フィラメント中間体） ７ Ｃｕマトリックス（マトリックス） ８ 複合体Reference Signs List 1 Nb 3 Sn filament (filament) 5 Sn substrate (substrate) 6 Nb filament (filament intermediate) 7 Cu matrix (matrix) 8 composite
Claims (2)
まわりに配置されたＮｂを主成分とする多数のフィラメ
ント中間体と、これらのフィラメント中間体の間に介在
したＣｕを主成分とするマトリックスとを有する複合体
に熱処理を施し、前記基体を拡散させて前記フィラメン
ト中間体をＮｂ3Ｓｎ系化合物からなるフィラメントに
するＮｂ3Ｓｎ系の超電導線の製造方法において、前記
基体に近い位置に配置されるフィラメント中間体間の離
隔距離を、前記基体から遠い位置に配置されるフィラメ
ント中間体間の離隔距離よりも長くすることを特徴とす
る超電導線の製造方法。1. A substrate mainly composed of Sn, a plurality of filament intermediates mainly composed of Nb disposed around the substrate, and a main component composed of Cu interposed between these filament intermediates. subjected to heat treatment composite having a matrix of a method of manufacturing a Nb 3 Sn based superconducting wire to the filament intermediates by diffusing said substrate to filament consisting of Nb 3 Sn compound, a position closer to the base A method for manufacturing a superconducting wire, characterized in that the separation distance between the filament intermediates arranged in the substrate is longer than the separation distance between the filament intermediates disposed far from the substrate.
まわりに配置されたＮｂを主成分とする多数のフィラメ
ント中間体と、これらのフィラメント中間体の間に介在
したＣｕを主成分とするマトリックスとを有する複合体
に熱処理を施し、前記基体を拡散させて前記フィラメン
ト中間体をＮｂ3Ｓｎ系化合物からなるフィラメントに
するＮｂ3Ｓｎ系の超電導線の製造方法において、前記
フィラメント中間体の横断面形状を六角形にすることを
特徴とすることを特徴とする超電導線の製造方法。2. A substrate mainly composed of Sn, a plurality of filament intermediates mainly composed of Nb disposed around the substrate, and a main component composed of Cu interposed between these filament intermediates. to a heat treatment to the composite body having a matrix, the method for producing Nb 3 Sn based superconducting wire to the filament intermediates by diffusing said substrate to filament consisting of Nb 3 Sn compound, the filament intermediate A method for manufacturing a superconducting wire, characterized in that a cross-sectional shape is hexagonal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3110683A JP3070969B2 (en) | 1991-05-16 | 1991-05-16 | Superconducting wire manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3110683A JP3070969B2 (en) | 1991-05-16 | 1991-05-16 | Superconducting wire manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04341710A JPH04341710A (en) | 1992-11-27 |
| JP3070969B2 true JP3070969B2 (en) | 2000-07-31 |
Family
ID=14541805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3110683A Expired - Fee Related JP3070969B2 (en) | 1991-05-16 | 1991-05-16 | Superconducting wire manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3070969B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105321626A (en) * | 2015-11-25 | 2016-02-10 | 西部超导材料科技股份有限公司 | Method for preparing Nb<3>Sn superconducting wire by low magnetic hysteresis loss internal tin process |
-
1991
- 1991-05-16 JP JP3110683A patent/JP3070969B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105321626A (en) * | 2015-11-25 | 2016-02-10 | 西部超导材料科技股份有限公司 | Method for preparing Nb<3>Sn superconducting wire by low magnetic hysteresis loss internal tin process |
| CN105321626B (en) * | 2015-11-25 | 2017-03-22 | 西部超导材料科技股份有限公司 | Method for preparing Nb3Sn superconducting wire by low magnetic hysteresis loss internal tin process |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04341710A (en) | 1992-11-27 |
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