JPH07106940B2 - Superconductor and manufacturing method thereof - Google Patents
Superconductor and manufacturing method thereofInfo
- Publication number
- JPH07106940B2 JPH07106940B2 JP63178760A JP17876088A JPH07106940B2 JP H07106940 B2 JPH07106940 B2 JP H07106940B2 JP 63178760 A JP63178760 A JP 63178760A JP 17876088 A JP17876088 A JP 17876088A JP H07106940 B2 JPH07106940 B2 JP H07106940B2
- Authority
- JP
- Japan
- Prior art keywords
- superconductor
- undercoat
- sprayed
- base material
- 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
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Coating By Spraying Or Casting (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (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、超電導体及びその製造方法に関する。The present invention relates to a superconductor and a method for manufacturing the same.
［従来の技術と発明が解決しようとする課題］ 従来、薄形超電導体の製造方法として、スパッタリング
法、ペースト塗布法、溶射法等が提案されている。この
うち、従来の溶射法では、例えばステンレス鋼からなる
基材上に超電導粉体を直接溶射した後、焼結処理を施し
ていた。[Prior Art and Problems to be Solved by the Invention] Conventionally, as a method for manufacturing a thin superconductor, a sputtering method, a paste coating method, a thermal spraying method, and the like have been proposed. Among these, in the conventional thermal spraying method, the superconducting powder is directly sprayed on a base material made of, for example, stainless steel, and then the sintering treatment is performed.
ところが、この薄形超電導体の製造方法では、ステンレ
ス鋼基材と超電導体の溶射層との間で溶射中及び焼結中
に相互拡散が生じるため、満足できる超電導体を製造す
ることができなかった。However, in this thin superconductor manufacturing method, a satisfactory superconductor cannot be manufactured because mutual diffusion occurs between the stainless steel base material and the sprayed layer of the superconductor during thermal spraying and sintering. It was
［発明の目的］ 本発明は、基材と超電導体溶射層との相互拡散を防止し
た超電導体の製造方法を提供し、良好な特性を有する超
電導体を提供することを目的とする。[Object of the Invention] An object of the present invention is to provide a method for producing a superconductor in which mutual diffusion between a substrate and a superconductor sprayed layer is prevented, and to provide a superconductor having good characteristics.
［課題を解決するための手段とその作用］ 本発明では、上記の目的を達成するために、基材に耐酸
化性合金と部分安定化ジルコニアとをこの順に溶射して
２層構造のアンダーコートを施した後、このアンダーコ
ート上に超電導粉体を溶射し、これを更に焼結処理する
超電導体の製造方法を採用した。これにより、基材に耐
酸化性合金と部分安定化ジルコニアとをこの順に溶射し
て形成した２層構造のアンダーコート上に超電導粉体の
溶射層を形成してなる超電導体が得られる。[Means for Solving the Problem and Its Action] In the present invention, in order to achieve the above object, a base material is sprayed with an oxidation resistant alloy and a partially stabilized zirconia in this order to form an undercoat having a two-layer structure. After that, a superconducting powder was sprayed on the undercoat, and the superconducting powder was further sintered. As a result, a superconductor is obtained in which a sprayed layer of superconducting powder is formed on an undercoat having a two-layer structure formed by spraying an oxidation resistant alloy and partially stabilized zirconia on a base material in this order.
基材上に直接形成される耐酸化性合金のアンダーコート
は、この上に更に形成する被膜の密着強度を向上させる
作用を有する。そして、２層からなるアンダーコートが
基材と超電導体層との相互拡散を防止する。The undercoat of the oxidation resistant alloy formed directly on the base material has a function of improving the adhesion strength of the coating film further formed thereon. Then, the two-layer undercoat prevents mutual diffusion between the base material and the superconductor layer.
［実施例］ 以下、本発明に係る超電導体及びその製造方法を実施例
により更に詳細に説明するが、本発明は以下の実施例に
限定されるものではない。[Examples] Hereinafter, the superconductor and the method for producing the same according to the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the following Examples.
まず、本発明で使用する超電導粉体を、例えば乾式・固
相法により作成する。すなわち、はじめにY2O3、BaCO3
及びCuOをY:Ba:Cu＝1:2:3となるように計量する。これ
らの材料を混合して、920〜940℃で５時間仮焼した後、
炉冷する。焼結したものを粉砕・混合し、再び焼結す
る。これらの混合・粉砕、仮焼及び炉冷を例えば５回繰
返した後、更に粉砕したものを電動ふるい機で20〜90μ
ｍに分粒し、これを選択する。以上のようにして超電導
粉体を準備する。First, the superconducting powder used in the present invention is prepared by, for example, a dry / solid phase method. That is, first, Y 2 O 3 , BaCO 3
And CuO are weighed so that Y: Ba: Cu = 1: 2: 3. After mixing these materials and calcining at 920-940 ℃ for 5 hours,
Cool the furnace. The sintered material is crushed and mixed, and then sintered again. After mixing, crushing, calcining and furnace cooling, for example, 5 times, further crushing the product with an electric sieving machine at 20 to 90μ
Size to m and select this. The superconducting powder is prepared as described above.
なお、最終粉砕前にディスク状にプレス成形したものに
ついて温度に対する抵抗値変化を測定したところ、第１
図に示す結果を得た。ただし、抵抗値測定は４端子法に
よる。また、この試料の分析の結果、YBa2Cu3O6.83なる
化学式で表される臨界温度Tcの高い超電導セラミックス
の形成が確認された。In addition, when the change in resistance value with respect to temperature was measured with respect to the one press-formed into a disk shape before final pulverization,
The results shown in the figure were obtained. However, the resistance value is measured by the 4-terminal method. As a result of analysis of this sample, formation of superconducting ceramics having a high critical temperature Tc represented by the chemical formula YBa 2 Cu 3 O 6.83 was confirmed.
基材としては、SUS304を使用する。このステンレス鋼基
材は、脱脂した後、アルミナ・ブラストを施しておく。
この基材上に溶射によってアンダーコートを施した後、
前記の超電導粉体を溶射し、更に溶射層を焼結する。溶
射に使用する装置としては、例えば公知のAPS（Atmosph
eric Plasma Spraying System）を使用することができ
る。この装置は、プラズマ中に溶射しようとする物質の
粉末を送給し、これを溶解して吹付けるものである。超
電導粉体の溶射のためのプラズマは、ArとHeとの混合ガ
スに24kWの電力を投入して発生させたものを使用するこ
とができ、両ガスの流量は例えばそれぞれ40/min及び
15/minである。粉体供給のためのキャリアガスとして
は、流量４/minのArガスを使用することができる。SUS304 is used as the base material. This stainless steel substrate is degreased and then alumina blasted.
After applying an undercoat on this substrate by thermal spraying,
The superconducting powder is sprayed, and the sprayed layer is sintered. As a device used for thermal spraying, for example, a known APS (Atmosph
eric Plasma Spraying System) can be used. This device feeds powder of a substance to be sprayed into plasma, melts and sprays the powder. The plasma for spraying the superconducting powder can be generated by applying 24 kW of electric power to a mixed gas of Ar and He, and the flow rates of both gases are, for example, 40 / min and
15 / min. Ar gas having a flow rate of 4 / min can be used as a carrier gas for supplying the powder.
次に、アンダーコートの材質及び構造並びに溶射後の焼
結条件が異なる２サンプルにつき説明する。超電導体溶
射層の厚みは、いずれのサンプルの場合も140μｍであ
る。Next, two samples having different materials and structures of the undercoat and sintering conditions after thermal spraying will be described. The thickness of the superconductor sprayed layer is 140 μm in all the samples.
サンプル１（実施例） 耐酸化性合金であるCo−32Ni−21Cr−8Al−0.5Yからな
る厚さ50μｍのアンダーコートを施した後、更に部分安
定化ジルコニアすなわちYSZ（８％Y2O3・ZrO2）からな
る厚さ100μｍのアンダーコートを施す。このアンダー
コート上に前記の超電導粉体を溶射した後、大気中にお
いて930〜940℃で５時間焼結し、炉冷する。Sample 1 (Example) After applying an undercoat of Co-32Ni-21Cr-8Al-0.5Y, which is an oxidation resistant alloy, with a thickness of 50 μm, partially stabilized zirconia, that is, YSZ (8% Y 2 O 3 ·. Apply a 100 μm thick undercoat of ZrO 2 ). After spraying the superconducting powder on the undercoat, it is sintered in the atmosphere at 930 to 940 ° C. for 5 hours and cooled in a furnace.
サンプル２（比較例） 耐酸化性合金であるCo−32Ni−21Cr−8Al−0.5Yからな
る１層のアンダーコートを施す。厚さは50μｍである。
このアンダーコート上に前記の超電導粉体を溶射した
後、サンプル１と同一条件で焼結する。Sample 2 (Comparative Example) A single-layer undercoat of Co-32Ni-21Cr-8Al-0.5Y which is an oxidation resistant alloy is applied. The thickness is 50 μm.
The above-mentioned superconducting powder is sprayed on this undercoat and then sintered under the same conditions as in Sample 1.
以上に説明した２サンプルについて超電導体溶射層の抵
抗値の温度変化を測定したところ、第２図に示す結果を
得た。R1、R2はそれぞれサンプル１、２を表す。なお、
抵抗値測定は４端子法による。When the temperature change of the resistance value of the superconductor sprayed layer was measured for the two samples described above, the results shown in FIG. 2 were obtained. R1 and R2 represent samples 1 and 2, respectively. In addition,
The resistance value is measured by the 4-terminal method.
この測定結果によれば、本発明の実施例に係るサンプル
１は、高い臨界温度Tcを有する超電導体であることがわ
かる。サンプル１の分析の結果、YBa2Cu3O6.83なる化学
式で表される超電導セラミックス皮膜の形成が確認され
た。酸素含有量は、前記の溶射前のディスク状態からほ
とんど変化していない。これに対してアンダーコートが
耐酸化性合金だけのサンプル２は、サンプル１より特性
が悪い。From these measurement results, it can be seen that Sample 1 according to the example of the present invention is a superconductor having a high critical temperature Tc. As a result of analysis of Sample 1, formation of a superconducting ceramic film represented by the chemical formula YBa 2 Cu 3 O 6.83 was confirmed. The oxygen content is almost unchanged from the disk state before the thermal spraying. On the other hand, Sample 2 in which the undercoat is only the oxidation resistant alloy has poorer characteristics than Sample 1.
なお、SUS304のステンレス鋼基材に代えてMgO、SrTiO等
の他の材料の基材を使用しても良い。また、以上はYBaC
uO系超電導体の場合について説明したが、BiSrCaCuO系
等の他の超電導体の場合も同様にして基材との間の相互
拡散を防止した皮膜を作成することができる。なお、超
電導体溶射層の厚さが前記の値に限らないことはいうま
でもない。Instead of the stainless steel base material of SUS304, a base material of other materials such as MgO and SrTiO may be used. Also, the above is YBaC
Although the case of the uO-based superconductor has been described, a coating that prevents mutual diffusion with the substrate can be similarly formed in the case of another superconductor such as BiSrCaCuO-based. Needless to say, the thickness of the superconductor sprayed layer is not limited to the above value.
［発明の効果］ 以上に説明したように、本発明に係る超電導体の製造方
法では、耐酸化性合金と部分安定化ジルコニアとからな
るアンダーコートによって、基材と超電導体層との溶射
中及び焼結中の相互拡散が防止される。[Effects of the Invention] As described above, in the method for producing a superconductor according to the present invention, the undercoat consisting of the oxidation resistant alloy and the partially stabilized zirconia is used during the thermal spraying of the base material and the superconductor layer. Interdiffusion during sintering is prevented.
したがって、このアンダーコート上に超電導粉体の溶射
層を形成してなる本発明に係る超電導体は、良好な特性
を有する。Therefore, the superconductor according to the present invention in which the sprayed layer of superconducting powder is formed on this undercoat has good characteristics.
第１図は、本発明の実施例に係る超電導体の製造方法の
工程中、溶射前の超電導粉体をディスク状にプレス成形
したものの抵抗値の温度特性を示す図、 第２図は、本発明の実施例に係る超電導体の抵抗値及び
比較例の抵抗値の各温度特性を示す図である。 符号の説明 R1……本発明の実施例に係る超電導体の抵抗値の温度特
性 R2……比較例の抵抗値温度特性FIG. 1 is a diagram showing a temperature characteristic of resistance value of a superconducting powder before thermal spraying press-molded into a disc shape during a process of a method for manufacturing a superconductor according to an embodiment of the present invention, and FIG. It is a figure which shows each temperature characteristic of resistance value of the superconductor which concerns on the Example of invention, and the resistance value of a comparative example. Explanation of reference symbols R1 ... Temperature characteristic of resistance value of superconductor according to example of the present invention R2 ... Temperature characteristic of resistance value of comparative example
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０１Ｂ 12/06 ＺＡＡ 13/00 ５６５ Ｄ Ｈ０１Ｌ 39/24 ＺＡＡ Ｂ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location H01B 12/06 ZAA 13/00 565 D H01L 39/24 ZAA B
Claims (2)
アとをこの順に溶射して形成した２層構造のアンダーコ
ート上に超電導粉体の溶射層を形成してなることを特徴
とする超電導体。1. A sprayed layer of superconducting powder is formed on an undercoat of a two-layer structure formed by spraying an oxidation resistant alloy and partially stabilized zirconia on a base material in this order. Superconductor.
アとをこの順に溶射して２層構造のアンダーコートを施
した後、このアンダーコート上に超電導粉体を溶射し、
これを更に焼結処理することを特徴とする超電導体の製
造方法。2. A base material is sprayed with an oxidation resistant alloy and partially stabilized zirconia in this order to form an undercoat having a two-layer structure, and then superconducting powder is sprayed on the undercoat.
A method for producing a superconductor, which comprises subjecting this to further sintering treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63178760A JPH07106940B2 (en) | 1988-07-18 | 1988-07-18 | Superconductor and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63178760A JPH07106940B2 (en) | 1988-07-18 | 1988-07-18 | Superconductor and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0227616A JPH0227616A (en) | 1990-01-30 |
| JPH07106940B2 true JPH07106940B2 (en) | 1995-11-15 |
Family
ID=16054126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63178760A Expired - Lifetime JPH07106940B2 (en) | 1988-07-18 | 1988-07-18 | Superconductor and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07106940B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0313556A (en) * | 1989-06-09 | 1991-01-22 | Ngk Insulators Ltd | Production of oxide superconductor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2532914B2 (en) * | 1988-03-31 | 1996-09-11 | 三井金属鉱業株式会社 | Superconducting ceramic laminate and its manufacturing method |
-
1988
- 1988-07-18 JP JP63178760A patent/JPH07106940B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0227616A (en) | 1990-01-30 |
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