JPH02253521A - Manufacture of nb3al multicore superconducting wire - Google Patents
Manufacture of nb3al multicore superconducting wireInfo
- Publication number
- JPH02253521A JPH02253521A JP1075514A JP7551489A JPH02253521A JP H02253521 A JPH02253521 A JP H02253521A JP 1075514 A JP1075514 A JP 1075514A JP 7551489 A JP7551489 A JP 7551489A JP H02253521 A JPH02253521 A JP H02253521A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum alloy
- superconducting wire
- nb3al
- matrix
- heat treatment
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000011159 matrix material Substances 0.000 claims abstract description 12
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 7
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 6
- 229910052709 silver Inorganic materials 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract 5
- 229910052732 germanium Inorganic materials 0.000 claims abstract 4
- 239000002131 composite material Substances 0.000 claims description 11
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 abstract description 5
- 239000000956 alloy Substances 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 229910000676 Si alloy Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 description 7
- 238000003672 processing method Methods 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000886 hydrostatic extrusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001007 Tl alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000005324 grain boundary diffusion 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
- Inorganic Compounds Of Heavy Metals (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は超電導線の製造方法に係り、特に複合加工法に
よる第三元素の添加された多心構造のＮｂ３ Ａｌ超電
導線の製造方法の改良に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a superconducting wire, and in particular to an improvement in the method for manufacturing a multicore Nb3 Al superconducting wire to which a third element is added by a composite processing method. Regarding.
［従来の技術］
ＮＪ ＳｎやＮｂ３ Ａ１等の化合物系の超電導材料は
、一般にＮｂ−Ｔｌ合金等の合金系超電導材料に比較し
て優れた超電導特性を有しており、特にＮｂ３ Ａｌは
Ｎｂ３ Ｓｎに比較して上部臨界磁界（Ｈｃ２）が高い
上、機械的性質に優れる等の利点を有するが、Ｎｂ３
Ａｌの生成温度が高く、かつ長時間の熱処理を必要とす
る難点がある。Ｎｂ−Ａｌ系合金の拡散過程に関する研
究によれば、Ｎｂ−Ａｌの拡散速度は極めて小さく、た
とえば８００℃前後で数μ鵡のＮｂ５Ａ層を生成するた
めに極めて長時間の拡散時間を要することが知られてい
る。[Prior Art] Compound-based superconducting materials such as NJ Sn and Nb3 A1 generally have superior superconducting properties compared to alloy-based superconducting materials such as Nb-Tl alloy. Compared to Nb3, it has advantages such as a higher upper critical magnetic field (Hc2) and superior mechanical properties.
There are disadvantages in that the temperature at which Al is generated is high and a long heat treatment is required. According to research on the diffusion process of Nb-Al alloys, the diffusion rate of Nb-Al is extremely slow, and for example, it takes an extremely long diffusion time to generate an Nb5A layer of several micrometers at around 800°C. Are known.
しかしながら、ＮｂがＡｌ中に微細に多数存在すれば、
粒界拡散が支配的となり熱処理条件を改善することがで
きるため、実用レベルの超電導線を製造することが可能
となる。However, if a large number of fine Nb exist in Al,
Since grain boundary diffusion becomes dominant and the heat treatment conditions can be improved, it becomes possible to manufacture a practical level superconducting wire.
このような観点から、現在Ｎｂ３Ａｌ超電導線の製遣方
法の一つとして複合加工法が知られている。From this point of view, a composite processing method is currently known as one of the methods for manufacturing Nb3Al superconducting wires.
複合加工法はＮｂ管内にＡＩロッドを収容して減面加工
を施した後、これらの複数本をＮｂまたはＣｕ管内に挿
入し、この工程を必要に応じて複数回繰返した後、Ｎｂ
３ Ａｌ生成の熱処理を施すものである。In the composite processing method, an AI rod is housed in a Nb pipe and subjected to area reduction processing, and then multiple of these rods are inserted into a Nb or Cu pipe, and after repeating this process multiple times as necessary, the Nb
3 Heat treatment is performed to generate Al.
［発明が解決しようとする課題］
本発明は上記の複合加工法の改良に関するもので、第三
元素をＡｌ中に添加することにより加工性および超電導
特性の改善されたＮｂ３ Ａｌ多心超電導線の製造方法
を提供することをその目的とする。[Problems to be Solved by the Invention] The present invention relates to the improvement of the above-mentioned composite processing method, and relates to the improvement of the above-mentioned composite processing method. Its purpose is to provide a manufacturing method.
［課題を解決するための手段］
上記目的を達成するために、本発明のＮｂ、 Ａｌ多心
超電導線の製造方法は、Ｇｅ、 ８１． Ｍｇ、 Ａｇ
、 ＺｎおよびＣｕのいずれか一種以上を添加元素とす
るアルミニウム合金マトリックス中に多数のＮｂ線を配
置した複合体（Ａ）に減面加工を施した後、Ｎｂ３ Ａ
ｌ生成の熱処理を施すものであり、さらに多心化を図る
場合には、本願第２の発明、すなわちＣｕマトリックス
中に多数のＮｂ管を配置し、このＮｂ管内のアルミニウ
ム合金マトリックス中に多数のＮｂフィラメントを配置
した複合体（Ｂ）に減面加工を施した後、Ｎｂ３ Ａｌ
生成の熱処理を施す超電導線の製造方法において、前記
アルミニウム合金マトリックスとして、Ｇｅｓ Ｓｌ５
Ｍｇ、 Ａｇ、 ＺｎおよびＣｕのいずれか一種以上を
添加元素とするアルミニウム合金を用いるものである。[Means for Solving the Problems] In order to achieve the above object, the method for manufacturing a Nb, Al multi-core superconducting wire of the present invention includes Ge, 81. Mg, Ag
, After subjecting the composite (A) in which a large number of Nb wires are arranged in an aluminum alloy matrix containing one or more of Zn and Cu as an additive element to surface reduction processing, Nb3A
In order to further increase the number of cores, a large number of Nb tubes are placed in a Cu matrix, and a large number of Nb tubes are placed in an aluminum alloy matrix within this Nb tube. After reducing the area of the composite (B) in which Nb filaments are arranged, Nb3Al
In the method for manufacturing a superconducting wire that performs heat treatment for formation, the aluminum alloy matrix is GesSl5
An aluminum alloy containing one or more of Mg, Ag, Zn, and Cu as an additive element is used.
上記のＡ１合金マトリックスとしては、主として特性向
上のためにＧｅおよび／またはＳｔを添加した合金が用
いられ、この場合、その組成は、ＡＩ−（０，５〜３０
）ａｔ％Ｇｅ、 ＡＩ −（０，１〜１０）ａｔ％Ｓ１
およびＡ−１−Ｇｅ−８１合金に対しては（Ｇｅ＋Ｓｉ
） 〜０．１〜３０ａｔ％の範囲であることが好ましい
。その理由は添加量がこの範囲未満では臨界電流密度（
Ｊｃ ）や上部臨界磁界（Ｈｅ ２ ）等の超電導特性
向上の効果が小さく、この範囲を越えると加工性が低下
するためである。As the above A1 alloy matrix, an alloy to which Ge and/or St are added is mainly used to improve properties, and in this case, the composition is AI-(0.5~30
)at%Ge, AI-(0,1~10)at%S1
and for the A-1-Ge-81 alloy (Ge+Si
) It is preferably in the range of 0.1 to 30 at%. The reason is that if the amount added is less than this range, the critical current density (
This is because the effect of improving superconducting properties such as Jc ) and upper critical magnetic field (He 2 ) is small, and when this range is exceeded, workability deteriorates.
Ｇｅおよび／またはＳｌの添加量として上記範囲の高濃
度側を選択する場合には、急冷処理により共晶組織を微
細化して加工性を改善することが望ましい。When selecting the high concentration side of the above range as the amount of Ge and/or Sl added, it is desirable to refine the eutectic structure by rapid cooling treatment to improve workability.
Ｇｅ５８１の添加量としては、特に
ｌ≦Ｇｅ≦９ （ａｔ％）
０．１≦Ｓｔ≦３ （ａｔ％）
０．１≦（Ｇｅ＋８１）≦９ （ａｔ％）が好適する
。The addition amount of Ge581 is particularly preferably l≦Ge≦9 (at%), 0.1≦St≦3 (at%), 0.1≦(Ge+81)≦9 (at%).
同様に加工性向上の目的でＭｇｓ Ａｇｓ Ｚｎｓ Ｃ
ｕ等が添加され、この場合の組成としては、ＡＩ−（０
，５〜１０）ａｔ％Ｍｇ５Ａｌ −（０，５〜９）ａｔ
％Ａｇ 、 ＡＩ −（０，１〜２）ａｔ％Ｃｕ 、
ＡＩ −（０，５〜１０）ａｔ％Ｚｎや０．１〜２ａｔ
％の （Ｃｕ＋Ｇｅ）を添加したＡｌ−Ｃｕ−Ｇｅ合金
を用いることができる。Similarly, for the purpose of improving processability, Mgs Ags Zns C
u, etc., and the composition in this case is AI-(0
,5-10)at%Mg5Al-(0,5-9)at
%Ag, AI-(0,1-2)at%Cu,
AI - (0,5~10)at%Zn or 0.1~2at
% of (Cu+Ge) can be used.
実施例１
外径１ｏｓｓφ、内径８．７１−φのＡＩ −５ａｔ％
Ｍｇ管内に外径８．６關φのＮｂロッドを収容した後、
縮径加工を施して対辺間距１１１：１．０龍の断面六角
形の複合線を製造した。この複合線の１４８１本を外径
４７ 、８ ａｍφ、内径４２ 、５ ＋ａｍφのＮｂ
管内に稠密に充填し、このＮｂ管の外側に外径５６ ｖ
ｓφ、内径４８．３龍φのＣｕ管を配置した後、その両
端を密封した。次いで静水圧押出加工および伸線加工を
施して対辺間距離１．０龍の断面六角形の一次マルチ線
を製造した。Example 1 AI -5at% with outer diameter 1ossφ and inner diameter 8.71-φ
After housing the Nb rod with an outer diameter of 8.6 mm in the Mg tube,
A composite wire having a hexagonal cross section with a distance between opposite sides of 111:1.0 was manufactured by performing diameter reduction processing. 1481 of these composite wires are Nb with an outer diameter of 47,8 amφ and an inner diameter of 42,5 + amφ.
The inside of the tube is densely filled, and the outer diameter of the Nb tube is 56 V.
After placing a Cu tube with an inner diameter of sφ of 48.3 mm, both ends thereof were sealed. Next, hydrostatic extrusion processing and wire drawing processing were performed to produce a primary multi wire having a hexagonal cross section with a distance between opposite sides of 1.0 mm.
上記の一次マルチ線の９２６本を外径３９．５ｍｍφ、
内径３４．５關φのＣｕ管内に稠密に充填した後、静水
圧押出加工および伸線加工を施して外径１．０ｍｍφの
二次マルチ線を製造した。この時のＮｂフィラメント径
は０．４μｌφであった。The 926 primary multi wires above have an outer diameter of 39.5 mmφ,
After densely filling a Cu tube with an inner diameter of 34.5 mm, hydrostatic extrusion and wire drawing were performed to produce a secondary multi wire with an outer diameter of 1.0 mm. The Nb filament diameter at this time was 0.4 μlφ.
さらに二次マルチ線に７００℃×２時間の熱処理を施し
た多心超電導線の臨界電流密度を測定した結果、ｔｏ
Ｔで８０ＯＡ／ａｓ” 、１４ Ｔで１００Ａ／ａｍ２
（共に弁銅の値）の値が得られた。Furthermore, as a result of measuring the critical current density of a multi-core superconducting wire in which the secondary multi-wire was heat-treated at 700°C for 2 hours, it was found that
80OA/as” at T, 100A/am2 at 14T
(Both values are for valve copper) were obtained.
［発明の効果］
以上述べたように、本発明によれば加工性および超電導
特性の改善された多心構造のＮｂ、 ＡＩ超電導線を容
易に製造することができる。[Effects of the Invention] As described above, according to the present invention, an Nb, AI superconducting wire having a multi-core structure with improved workability and superconducting properties can be easily produced.
Claims (2)
れか一種以上を添加元素とするアルミニウム合金マトリ
ックス中に多数のＮｂ線を配置した複合体（Ａ）に減面
加工を施した後、Ｎｂ＿３Ａｌ生成の熱処理を施すこと
を特徴とするＮｂ＿３Ａｌ多心超電導線の製造方法。(1) After subjecting a composite (A) in which a large number of Nb wires are arranged in an aluminum alloy matrix containing one or more of Ge, Si, Mg, Ag, Zn, and Cu as an additive element to an area-reducing process, A method for producing a Nb_3Al multi-core superconducting wire, the method comprising performing heat treatment to generate Nb_3Al.
のＮｂ管内のアルミニウム合金マトリックス中に多数の
Ｎｂフィラメントを配置した複合体（Ｂ）に減面加工を
施した後、Ｎｂ＿３Ａｌ生成の熱処理を施す超電導線の
製造方法において、前記アルミニウム合金マトリックス
として、Ｇｅ、Ｓｉ、Ｍｇ、Ａｇ、ＺｎおよびＣｕのい
ずれか一種以上を添加元素とするアルミニウム合金を用
いることを特徴とするＮｂ＿３Ａｌ多心超電導線の製造
方法。(2) After applying surface reduction processing to the composite (B) in which a large number of Nb tubes are arranged in a Cu matrix and a large number of Nb filaments are arranged in an aluminum alloy matrix in this Nb tube, heat treatment is performed to generate Nb_3Al. In the method for manufacturing a superconducting wire according to the present invention, an aluminum alloy containing at least one of Ge, Si, Mg, Ag, Zn and Cu as an additive element is used as the aluminum alloy matrix. Production method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1075514A JPH02253521A (en) | 1989-03-28 | 1989-03-28 | Manufacture of nb3al multicore superconducting wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1075514A JPH02253521A (en) | 1989-03-28 | 1989-03-28 | Manufacture of nb3al multicore superconducting wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02253521A true JPH02253521A (en) | 1990-10-12 |
Family
ID=13578422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1075514A Pending JPH02253521A (en) | 1989-03-28 | 1989-03-28 | Manufacture of nb3al multicore superconducting wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02253521A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06196030A (en) * | 1991-08-29 | 1994-07-15 | Natl Res Inst For Metals | Manufacture of nb3 al compound |
-
1989
- 1989-03-28 JP JP1075514A patent/JPH02253521A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06196030A (en) * | 1991-08-29 | 1994-07-15 | Natl Res Inst For Metals | Manufacture of nb3 al compound |
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