JPH0227616A - Superconductor and its manufacturing method - Google Patents
Superconductor and its manufacturing methodInfo
- Publication number
- JPH0227616A JPH0227616A JP63178760A JP17876088A JPH0227616A JP H0227616 A JPH0227616 A JP H0227616A JP 63178760 A JP63178760 A JP 63178760A JP 17876088 A JP17876088 A JP 17876088A JP H0227616 A JPH0227616 A JP H0227616A
- Authority
- JP
- Japan
- Prior art keywords
- superconductor
- undercoat
- base material
- manufacturing
- oxidation
- 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.)
- Granted
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)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
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。[Detailed description of the invention] [Industrial application field] 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, sputtering methods, paste coating methods, thermal spraying methods, and the like have been proposed as methods for manufacturing thin superconductors. Among these methods, in the conventional thermal spraying method, superconducting powder is directly thermally sprayed onto a base material made of stainless steel, for example, and then sintered.
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, with this manufacturing method for thin superconductors, mutual diffusion occurs between the stainless steel base material and the sprayed layer of superconductor during thermal spraying and sintering, making it impossible to manufacture satisfactory superconductors. Ta.
［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。[Objects of the Invention] An object of the present invention is to provide a method for manufacturing a superconductor in which mutual diffusion between a base material 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順次溶射してアンダーコートを
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
コニアとを溶射して形成した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 problems and their effects] In the present invention,
In order to achieve the above objective, an oxidation-resistant alloy and partially stabilized zirconia are sequentially thermally sprayed onto the base material to form an undercoat, and then superconducting powder is thermally sprayed onto this undercoat, which is then further sintered. A method for manufacturing superconductors that involves sintering treatment was adopted. As a result, a superconductor is obtained in which a sprayed layer of superconducting powder is formed on an undercoat formed by spraying an oxidation-resistant alloy and partially stabilized zirconia onto a base material.
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皮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 oxidation-resistant alloy undercoat formed directly on the base material has the effect of improving the adhesion strength of a film further formed thereon. The two-layer undercoat prevents interdiffusion 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 manufacturing the same according to the present invention will be explained 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１こＹ Ｏ−
Ｂ ａ ＣＯａ及びＣｕＯをＹ二Ｂａ：Ｃｕ−１：２：
３となるように計量する。First, the superconducting powder used in the present invention is produced by, for example, a dry solid phase method. In other words, the first one is Y O-
B a COa and CuO Y2 Ba:Cu-1:2:
Weigh it so that it becomes 3.
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
２０〜９０μｍ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。These materials are mixed, calcined at 920 to 940°C for 5 hours, and then cooled in a furnace. The sintered material is crushed, mixed, and sintered again. After repeating these mixing, pulverizing, calcining, and furnace cooling, for example, five times, the pulverized product is further divided into particles of 20 to 90 μm using an electric sieve machine, and then selected. 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ｎ１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、ＹＢａ Ｃｕ
３０６．８３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 determined by n1 for the material press-molded into a disk shape before final pulverization, the results shown in FIG. 1 were obtained. However, the resistance value is measured using the 4-terminal method. In addition, as a result of analysis of this sample, YBa Cu
The formation of superconducting ceramics with a high critical temperature Tc expressed by the chemical formula 306.83 was confirmed.
基材としては、５ＵＳ３０４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
（Ａｔｍｏｓｐｈｅｒｉｃ Ｐｌａｓｍａ Ｓｐｒａｙ
ｌｎｇ 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４０４！／ｗ
１ｎ及び１５Ｎ／ｓｉｎである。粉体供給のためのキャ
リアガスとしては、流量４ Ｄ ／ ｗｉｎのＡｒガス
を使用することができる。5US304 is used as the base material. This stainless steel substrate is degreased and then alumina blasted. After applying an undercoat onto this base material by thermal spraying, the above-mentioned superconducting powder is thermally sprayed, and the thermally sprayed layer is further sintered. Examples of equipment used for thermal spraying include the well-known APS
(Atmosphere Plasma Spray
lng System) can be used. This device feeds powder of the substance to be thermally sprayed into plasma, melts it, and sprays it. The plasma for thermal spraying the superconducting powder can be generated by applying 24 kW of power to a mixed gas of Ar and He, and the flow rates of both gases are, for example, 404! /w
1n and 15N/sin. Ar gas with a flow rate of 4 D/win can be used as a carrier gas for powder supply.
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 with different undercoat materials and structures and sintering conditions after thermal spraying will be explained. The thickness of the superconductor sprayed layer is 140 μm in all samples.
サンプル１（実施例）
耐酸化性合金であるＣｏ−３２Ｎｉ−２１Ｃｒ−８Ａｊ
７−ｏ、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％Ｙ Ｏ・Ｚｒ０２）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) Co-32Ni-21Cr-8Aj, an oxidation-resistant alloy
After applying a 50 μm thick undercoat consisting of 7-o, 5Y, partially stabilized zirconia, YSZ (
A 100 μm thick undercoat made of 8% Y O.Zr02) is applied. After thermally spraying the superconducting powder onto this undercoat, it was heated to 930 to 940°C in the atmosphere.
Sinter for 5 hours and cool in the furnace.
サンプル２（比較例）
耐酸化性合金であるＣｏ−３２Ｎ ｉ−２１Ｃｒ−８Ａ
ＩＩ−０，５Ｙからなる１層のアンダーコートを施す。Sample 2 (comparative example) Co-32N i-21Cr-8A, an oxidation-resistant alloy
Apply one layer of undercoat consisting of II-0,5Y.
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。The thickness is 50 μm. After spraying the superconducting powder onto this undercoat, it is sintered under the same conditions as 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 in 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 each represent sample 1.2. Note that the resistance value was measured using a four-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、ＹＢａ Ｃｕ
Ｏなる化学式で２ ３ ６．８３
表される超電導セラミックス皮膜の形成が確認された。According to the 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, YBa Cu
Formation of a superconducting ceramic film represented by the chemical formula 2 3 6.83 was confirmed.
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。The oxygen content has hardly changed from the state of the disk before thermal spraying. On the other hand, Sample 2, in which the undercoat consists of only an oxidation-resistant alloy, has poorer characteristics than Sample 1.
なお、５ＵＳ３０４のステンレス鋼基材に代えてＭｇ０
％５ｒＴｉＯ等の他の材料の基材を使用しても良い。ま
た、以上はＹＢａＣｕＯ系超電導体の場合について説明
したが、Ｂ１５ｒＣａＣｕＯ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。In addition, instead of the stainless steel base material of 5US304, Mg0
Substrates of other materials such as %5rTiO may also be used. Moreover, although the case of a YBaCuO-based superconductor has been described above, a film that prevents mutual diffusion with the base material can be created in the same manner in the case of other superconductors such as a B15rCaCuO-based superconductor. It goes without saying that 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 explained above, in the method for manufacturing a superconductor according to the present invention, the undercoat made of an oxidation-resistant alloy and partially stabilized zirconia prevents the superconductor layer from being thermally sprayed on 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 a 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 the temperature characteristics of the resistance value of the superconducting powder press-molded into a disc shape before thermal spraying during the process of the superconductor manufacturing method according to the embodiment of the present invention. FIG. 3 is a diagram showing the temperature characteristics of the resistance value of a superconductor according to an example of the invention and the resistance value of a comparative example. Explanation of symbols R1... Temperature characteristics of the resistance value of the superconductor according to the example of the present invention R2... Temperature characteristics of the resistance value of the comparative example
Claims (1)
射して形成した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。 ２、基材に耐酸化性合金と部分安定化ジルコニアとを順
次溶射して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。[Scope of Claims] 1. A superconductor characterized in that a sprayed layer of superconducting powder is formed on an undercoat formed by spraying an oxidation-resistant alloy and partially stabilized zirconia onto a base material. 2. After applying an undercoat by sequentially spraying an oxidation-resistant alloy and partially stabilized zirconia onto the base material, superconducting powder is sprayed onto the undercoat and this is further sintered. A method for manufacturing superconductors.
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 true JPH0227616A (en) | 1990-01-30 |
| JPH07106940B2 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0313556A (en) * | 1989-06-09 | 1991-01-22 | Ngk Insulators Ltd | Production of oxide superconductor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01252534A (en) * | 1988-03-31 | 1989-10-09 | Mitsui Mining & Smelting Co Ltd | Laminate of superconducting ceramics and production thereof |
-
1988
- 1988-07-18 JP JP63178760A patent/JPH07106940B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01252534A (en) * | 1988-03-31 | 1989-10-09 | Mitsui Mining & Smelting Co Ltd | Laminate of superconducting ceramics and production thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0313556A (en) * | 1989-06-09 | 1991-01-22 | Ngk Insulators Ltd | Production of oxide superconductor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07106940B2 (en) | 1995-11-15 |
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