JP2637080B2 - Method for manufacturing compound superconductor - Google Patents
Method for manufacturing compound superconductorInfo
- Publication number
- JP2637080B2 JP2637080B2 JP61227963A JP22796386A JP2637080B2 JP 2637080 B2 JP2637080 B2 JP 2637080B2 JP 61227963 A JP61227963 A JP 61227963A JP 22796386 A JP22796386 A JP 22796386A JP 2637080 B2 JP2637080 B2 JP 2637080B2
- Authority
- JP
- Japan
- Prior art keywords
- laser beam
- compound
- superconductor
- substrate
- powder layer
- 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 - Lifetime
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
- Superconductors And Manufacturing Methods Therefor (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は，レーザービーム照射法で化合物超電導体を
製造する製造方法に係り，特に，製造工程を大幅に簡略
化できるようにした製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a manufacturing method for manufacturing a compound superconductor by a laser beam irradiation method, and in particular, to greatly simplify the manufacturing process. To a manufacturing method.
（従来の技術） 周知のように，現在実用化されているA15型化合物超
電導体は,Nb3SnとV3Gaとである。これらは，いずれも表
面拡散法，複合加工法など，通常の熱処理による拡散反
応工程を経て製造されている。しかし,Nb3SnやV3Gaの線
材を用いて作製されたマグネットは,Nb3Sn,V3Gaの上部
臨界磁界が20テスラ程度であるため,20テスラ程度の磁
界発生が限度であった。これに対して，同じA15型でもN
b3Al,Nb3Ga,Nb3Ge,Nb3（Al,Ge）は，上部臨界磁界が30
テスラ以上であるため，高磁界発生用マグネットの線材
として有望視されている。しかし，これらの化合物超電
導体を上述した拡散法で製造しようとしても，結晶性が
悪く，しかも化学組成の不均一なものしか得られず，こ
れが原因してマグネットへ応用する際の重要な特性であ
る臨界電流密度が著しく低下してしまう問題があった。
これは,Nb3Al,Nb3Ga,Nb3Ge,Nb3（Al,Ge）が2000℃程度
の高温でしか存在し得ない非平衡相であることによる。
したがって，超電導特性に優れたNb3Al,Nb3Ga,Nb3Ge,Nb
3（Al,Ge）超電導体を作るには，試料を溶融させた状態
から急冷する工程を必要とする。このようなことから，
最近，特開昭60−240542号に示されているように，レー
ザービーム照射法が開発された。このレーザービーム照
射法は，高速で移動する試料の表面に高いパワー密度を
持つレーザービームを照射し，試料を瞬時に溶融凝固さ
せ，この急冷過程でA15型超電導体を製造するようにし
ている。この方法で製造された超電導体は，優れた超電
導特性を示すことが報告されている。(Prior art) As is well known, the A15 type compound superconductors currently in practical use are Nb 3 Sn and V 3 Ga. These are all manufactured through a diffusion reaction step by ordinary heat treatment such as a surface diffusion method and a composite processing method. However, Nb 3 Sn or V 3 Ga magnet which is manufactured using a wire of, for upper critical magnetic field of the Nb 3 Sn, V 3 Ga is about 20 Tesla magnetic field generating about 20 tesla was limit . On the other hand, even with the same A15 type, N
b 3 Al, Nb 3 Ga, Nb 3 Ge, Nb 3 (Al, Ge) has an upper critical magnetic field of 30
Because it is higher than Tesla, it is regarded as a promising wire for magnets for generating high magnetic fields. However, even if these compound superconductors are manufactured by the above-mentioned diffusion method, only those with poor crystallinity and non-uniform chemical composition can be obtained, which is an important characteristic when applied to magnets. There is a problem that a certain critical current density is significantly reduced.
This is because Nb 3 Al, Nb 3 Ga, Nb 3 Ge, and Nb 3 (Al, Ge) are non-equilibrium phases that can exist only at a high temperature of about 2000 ° C.
Therefore, Nb 3 Al, Nb 3 Ga, Nb 3 Ge, Nb
3 Making an (Al, Ge) superconductor requires a process of rapidly cooling the sample from a molten state. From such a thing,
Recently, as disclosed in JP-A-60-240542, a laser beam irradiation method has been developed. This laser beam irradiation method irradiates a laser beam with a high power density onto the surface of a sample moving at high speed, instantaneously melts and solidifies the sample, and manufactures the A15 type superconductor in the rapid cooling process. It has been reported that superconductors produced by this method exhibit excellent superconducting properties.
しかしながら，上述したレーザービーム照射法を採用
した従来の製造方法では，レーザービームを照射する前
の試料作製に複雑な工程を必要としていた。たとえば，
特願昭60−240542号では,Nb粉末とAl粉末とを一定の組
成に混合し，これをNb管に封入した後，これに鍛造，線
引き，圧延等の加工を施してテープ状にし，このテープ
にレーザービームを照射してNb3Al超電導体を得るよう
にしている。このため，実際にレーザービームを照射す
る時間は非常に短いにも拘らず，レーザービームを照射
するまでに多くの複雑な工程を必要とし，結局，製造に
長時間を要し，コスト高になる問題があった。However, in the conventional manufacturing method employing the above-described laser beam irradiation method, a complicated process is required for sample preparation before laser beam irradiation. For example,
In Japanese Patent Application No. 60-240542, Nb powder and Al powder are mixed in a fixed composition, and the mixture is sealed in an Nb tube, and then subjected to processing such as forging, drawing, and rolling to form a tape. The tape is irradiated with a laser beam to obtain an Nb 3 Al superconductor. For this reason, although the time for actually irradiating the laser beam is very short, many complicated processes are required until the laser beam is irradiated, and as a result, the production takes a long time and the cost increases. There was a problem.
（発明が解決しようとする問題点） 上述の如く，レーザービーム照射法は，理に適った優
れた方法であるが，照射前の試料作製段階で多大の時間
を要し，結果としてコスト高になる問題があった。(Problems to be Solved by the Invention) As described above, the laser beam irradiation method is a reasonable and excellent method, but requires a great deal of time in the sample preparation stage before irradiation, resulting in high cost. There was a problem.
そこで本発明は，レーザービーム照射法の特徴を損う
ことなく，製造時間を大幅に短縮でき，コストの低減化
を図れる化合物超電導体の製造方法を提供することを目
的としている。Therefore, an object of the present invention is to provide a method of manufacturing a compound superconductor that can significantly reduce the manufacturing time and reduce the cost without impairing the features of the laser beam irradiation method.
［発明の構成］ （問題点を解決するための手段） 本発明は，レーザビーム照射法で化合物超電導体を製
造するに当り，金属材製の基板上に化合物超電導体の各
構成元素粉末を混合した粉末層または各構成元素間の化
合物の粉末層を設け，この粉末層の上から上記レーザビ
ームを照射して粉末層を溶融凝固させることにより前記
基板上に超電導体である化合物層を形成するようにして
いる。[Constitution of the Invention] (Means for Solving the Problems) In the present invention, when producing a compound superconductor by a laser beam irradiation method, powders of the constituent elements of the compound superconductor are mixed on a metal substrate. A powder layer of a compound between the respective constituent elements is formed, and the laser beam is irradiated from above on the powder layer to melt and solidify the powder layer, thereby forming a compound layer as a superconductor on the substrate. Like that.
（作用） 基板上に設けられた粉末層の各種粉末は，レーザービ
ームの照射によって溶融し，互いに反応化合して化合物
超電導体を形成する。また，基板を構成している金属材
とも拡散層を形成するので，基板に強固に密着した化合
物超電導体が形成されることになる。(Operation) The various powders of the powder layer provided on the substrate are melted by irradiation with a laser beam, and react and combine with each other to form a compound superconductor. Further, since the diffusion layer is also formed with the metal material constituting the substrate, a compound superconductor firmly adhered to the substrate is formed.
（実施例） 以下，本発明の実施例を説明する。(Example) Hereinafter, an example of the present invention will be described.
まず，第１図に示すように，長さ15cm,幅10cm,厚さ2c
mのCu製の試料ホルダー１を用意し，この試料ホルダー
１の上面に長さ10cm,幅7mm,厚さ1000μｍのNbテープか
らなる基板２を載置し，この基板２の両端をCu製の押え
部材３で試料ホルダー１に固定した。次に，基板２の上
面に，純度99％，粒径100μｍのNb粉末と純度99.9％，
粒径100μｍのAl粉末とをNb−25％Alの割合いに混合し
た混合粉末を塗布して粉末層４を形成した。First, as shown in Fig. 1, length 15cm, width 10cm, thickness 2c
A sample holder 1 made of Cu having a length of 10 cm, a width of 7 mm, and a thickness of 1000 μm is placed on the upper surface of the sample holder 1 and the both ends of the substrate 2 are made of Cu. It was fixed to the sample holder 1 by the holding member 3. Next, on the upper surface of the substrate 2, Nb powder having a purity of 99% and a particle size of 100 μm and a purity of 99.9% were prepared.
The powder layer 4 was formed by applying a mixed powder obtained by mixing Al powder having a particle diameter of 100 μm and Nb-25% Al.
次に，試料ホルダー１ごとチャンバー内に入れ，この
チャンバー内をArガス雰囲気にした後，粉末層４の上方
から粉末層４に向けて炭酸ガスレーザービーム５をオシ
レーション法で照射し，これによって粉末層４を短時間
だけ溶融させて基板２の上面側に溶融痕層Ｐを形成し
た。すなわち，レーザービーム５を図中太矢印６で示す
方向へ100Hzで振らせるとともに図中太矢印７で示す方
向へ1m/minの速度で移動させることによって粉末層４の
各部を一様に短時間だけ溶融させた。このときのレーザ
ーパワーは1Kwで，ビームスポット径は1mmであった。Next, the sample holder 1 is put into a chamber together with the chamber, and the inside of the chamber is set to an Ar gas atmosphere. Then, a carbon dioxide gas laser beam 5 is irradiated from above the powder layer 4 toward the powder layer 4 by an oscillation method. The powder layer 4 was melted only for a short time to form a trace mark layer P on the upper surface side of the substrate 2. That is, by oscillating the laser beam 5 in the direction indicated by the thick arrow 6 in the figure at 100 Hz and moving the laser beam 5 in the direction indicated by the thick arrow 7 in the figure at a speed of 1 m / min, the respective parts of the powder layer 4 can be evenly and quickly reduced. Only melted. At this time, the laser power was 1 Kw and the beam spot diameter was 1 mm.
このようにレーザービーム５を照射した後の試料の断
面を調べたところ，第２図に示すように，基板２の上面
側に拡散層８が形成されており，この拡散層８の上面側
にNbとAlとが溶融化合した化合物層９が形成されてい
た。そして,X線回折の結果，化合物層９の部分に超電導
体であるNb3Alが確認された。When the cross section of the sample after the irradiation with the laser beam 5 was examined in this manner, as shown in FIG. 2, a diffusion layer 8 was formed on the upper surface side of the substrate 2. The compound layer 9 in which Nb and Al were melted and combined was formed. As a result of X-ray diffraction, Nb 3 Al, which is a superconductor, was confirmed in the compound layer 9.
このように，上述した製造方法では，レーザービーム
５を照射する前の工程は，基板２上に目的とする化合物
超電導体（Nb3Al）の構成元素であるNbの粉末とAlの粉
末とを混合した粉末層４を載置または塗布によって設け
るだけである。したがって，従来の製造方法に比べて，
レーザービーム照射前の工程を大幅に簡略化できること
になる。As described above, in the manufacturing method described above, the step before irradiating the laser beam 5 involves, on the substrate 2, a powder of Nb and a powder of Al, which are constituent elements of the target compound superconductor (Nb 3 Al). It is only necessary to provide the mixed powder layer 4 by placing or coating. Therefore, compared to the conventional manufacturing method,
The process before laser beam irradiation can be greatly simplified.
なお，本発明は上述した実施例に限定されるものでは
ない。すなわち，上述した実施例ではNb単体の粉末とAl
単体の粉末とを用いているが,Nb2Al等の化合物の粉末を
用いるようにしてもよい。また，上述した実施例では得
ようとしている化合物超伝導体の構成元素のなかの一元
素で構成された基板を用いるようにしているが，必ずし
もこのような基板を用いる必要はない。ただし，基板は
熱伝導性に優れていることを必要とする。また，上述し
た実施例ではレーザービームを移動させているが，試料
側を移動させるようにしてもよい。また，本発明は,Nb3
Alの製造に限らず，他のA15型化合物超電導体の製造に
も適用できることは勿論である。The present invention is not limited to the embodiment described above. That is, in the above-described embodiment, Nb simple powder and Al
Although a single powder is used, a powder of a compound such as Nb 2 Al may be used. Further, in the above-described embodiment, a substrate made of one of the constituent elements of the compound superconductor to be obtained is used, but such a substrate is not necessarily used. However, the substrate needs to have excellent thermal conductivity. Although the laser beam is moved in the above-described embodiment, the sample side may be moved. Also, the present invention relates to Nb 3
It is needless to say that the present invention can be applied not only to the production of Al but also to the production of other A15 type compound superconductors.
［発明の効果］ 以上述べたように，本発明によれば，レーザービーム
照射前の工程を大幅に簡略化できるので，全工程の短時
間化を実現でき，製造コストの低減化に寄与できる製造
方法を提供できる。また，本発明の製造方法では，金属
製の基板上に帯状や線状に強固に密着した形態の化合物
超電導体を得ることができるので，基板を化合物超電導
体の支持材として利用できる。したがって，得られた化
合物超電導体の取扱いの容易化にも寄与できる。[Effects of the Invention] As described above, according to the present invention, the steps before laser beam irradiation can be greatly simplified, so that the entire steps can be shortened and the manufacturing cost can be reduced. We can provide a method. Further, according to the production method of the present invention, a compound superconductor in a form in which the compound superconductor is firmly adhered to a metal substrate in a band shape or a line shape can be obtained, so that the substrate can be used as a support material for the compound superconductor. Therefore, it is possible to contribute to facilitation of handling of the obtained compound superconductor.
【図面の簡単な説明】 第１図は本発明製造方法の一実施形態を説明するための
図，第２図はレーザービーム照射後の試料の断面形態を
説明するための図である。 １……試料ホルダー,2……基板,4……粉末層,5……レー
ザービーム,8……拡散層,9……化合物層。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view for explaining an embodiment of the manufacturing method of the present invention, and FIG. 2 is a view for explaining a cross-sectional form of a sample after laser beam irradiation. 1 ... Sample holder, 2 ... Substrate, 4 ... Powder layer, 5 ... Laser beam, 8 ... Diffusion layer, 9 ... Compound layer.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中村 英 横浜市磯子区新杉田町８番地 株式会社 東芝生産技術研究所内 (56)参考文献 特開 昭61−261465（ＪＰ，Ａ) 特開 昭60−165338（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Ei Nakamura 8 Shinsugita-cho, Isogo-ku, Yokohama-shi Inside Toshiba Institute of Industrial Science (56) References JP-A-61-261465 (JP, A) JP-A-60- 165338 (JP, A)
Claims (3)
造するに当り，金属材製の基板上に化合物超電導体の各
構成元素粉末を混合した粉末層または各構成元素間の化
合物の粉末層を設け，この粉末層の上から上記レーザビ
ームを照射して粉末層を溶融凝固させることにより前記
基板上に超電導体である化合物層を形成することを特徴
とする化合物超電導体の製造方法。In producing a compound superconductor by a laser beam irradiation method, a powder layer obtained by mixing powders of the constituent elements of the compound superconductor or a powder layer of a compound between the constituent elements is formed on a metal substrate. Forming a compound layer as a superconductor on the substrate by irradiating the laser beam from above the powder layer to melt and solidify the powder layer.
て形成されることを特徴とする特許請求の範囲第１項記
載の化合物超電導体の製造方法。2. The method for manufacturing a compound superconductor according to claim 1, wherein said powder layer is formed by coating on said substrate.
の一構成元素で構成されていることを特徴とする特許請
求の範囲第１項記載の化合物超電導体の製造方法。3. The method for manufacturing a compound superconductor according to claim 1, wherein said substrate is made of a constituent element of the compound superconductor to be obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61227963A JP2637080B2 (en) | 1986-09-29 | 1986-09-29 | Method for manufacturing compound superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61227963A JP2637080B2 (en) | 1986-09-29 | 1986-09-29 | Method for manufacturing compound superconductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6386208A JPS6386208A (en) | 1988-04-16 |
| JP2637080B2 true JP2637080B2 (en) | 1997-08-06 |
Family
ID=16869000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61227963A Expired - Lifetime JP2637080B2 (en) | 1986-09-29 | 1986-09-29 | Method for manufacturing compound superconductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2637080B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5431967A (en) * | 1989-09-05 | 1995-07-11 | Board Of Regents, The University Of Texas System | Selective laser sintering using nanocomposite materials |
| CN121416212A (en) * | 2025-12-18 | 2026-01-27 | 西安聚能超导线材科技有限公司 | A method for preparing the outer conductor of a flexible superconducting coaxial cable and its application. |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60165338A (en) * | 1984-02-08 | 1985-08-28 | Hitachi Ltd | Compound super-conductor and its preparation |
| JPS61261465A (en) * | 1985-05-16 | 1986-11-19 | Natl Res Inst For Metals | Manufacture of compound superconductor |
-
1986
- 1986-09-29 JP JP61227963A patent/JP2637080B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6386208A (en) | 1988-04-16 |
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