WO1982000733A1 - Process for manufacturing chemical compound-type superconducting wires - Google Patents

Abstract

A process for manufacturing chemical compound-type superconducting wires, having excellent superconducting properties and mechanical properties, which comprises forming a composite metal wire by coating a core (1) of either Nb or V metal with a matrix phase (2) composed of a comparatively easily deformable metal such as Cu, Sn, Ga, Cu-Sn alloy or Cu-Ga alloy, cutting this composite metal wire to prepare short-length composite wires, heating and stretching an assembly of the latter, and further heating them.

Description

 Specification

 Title of invention

 Method for producing compound-based superconducting wire

 Technical field

The present invention relates to a highly reliable and economical method of manufacturing a compound superconducting wire having excellent mechanical strength, and particularly to a method for applying the compound superconducting wire to a high magnetic field superconducting magnet. also Ru Nodea ₀

 Background art

間 The intermetallic compound superconducting wires such as 3Sn and V3Ga have a structure in which a large number of compound cores are embedded as continuous fibers in the matrix, but superconducting compounds are inherently superior. the other hand you have the superconducting characteristics, essentially vulnerable], the elongation mechanical tensile force rather Nikki is N and the coercive and ^0.1 ^ below, wire rod production for Ru fragility Jakudea in pairs to bending信 頼 The winding efficiency of the coil was poor and the cooling efficiency of the liquid helium was low. O To eliminate such disadvantages, A large number of discontinuous superconducting compound fibers in close proximity are embedded in the matrix, and the superconducting fiber is used as the whole wire by utilizing the tunnel effect called the proximity effect or the filament effect. A discontinuous fiber compound superconducting wire that is in a state is considered, but its superconducting properties Compared to the ultra-fine multi-core line of continuous fiber, very low even optimal Tsu to Nodea j commercialization Tei ¾ I ₀

Conventional discontinuous fiber compound superconducting wire is N ¾ ⁵ Sn compound

OMPI For example, the following two manufacturing methods are typically considered:

The method of the first〗 dissolves and G _U, N is create篛塊with tissue scattered particulate your good beauty acicular C _U parent phase, to which the wire was drawn, surface or found to diffuse s _n at the final dimension, Ru method der to produce N¾ 3 Sn on the surface of the n ¾ fibers stretched rather long o

Also, the second method is to mix Konahitsuji of each single metal of N ¾ and C u, after filling it into C _U-based metal tube, the wire was drawn, or surface s _n at the final dimensions O to form N¾3Sn on the surface of N fiber o

 However, in the former method, if the ratio of N¾ to Cu is 25 vo or more, it is difficult to dissolve and mirror, and a superconducting mass containing a high ratio of N¾ cannot be obtained. It is also very difficult to wire-draw after fabrication.] 9 However, the superconductivity and manufacturing reliability were inferior. O On the other hand, in the latter method, the commercially available Nb powder did not have a fibrous form due to wire-drawing. Because it is difficult to perform, surface treatment is required beforehand for Nb and Cu powder, but this surface treatment is complicated and difficult, and there are many breakage accidents during wire drawing. Deterioration in properties and manufacturing reliability

Disclosure of the invention

 According to the present invention, a large number of discontinuous compound superconductive fibers are buried in a metal wire, which has excellent mechanical ductility and good cooling efficiency.

O PI WIPO ', The purpose is to provide a compound-based superconducting wire having excellent superconducting properties and to stably and easily manufacture it.

 Next, the present invention will be described. First, Cu-based, Sn-based,

 Ga system, & e system, system, Si system, Cu-Sn alloy system,

 At least one of the Cu- & a alloys, Cu-alloys, Cu-alloys, and Cu-Si alloys has a parent phase of at least one kind of metal. A composite multifilamentary wire having a configuration in which a large number of core wires made of any one of the metals of the Ni-based or V-series is buried is obtained. Then, after drawing the composite multifilamentary wire, the wire is cut to a length of about 1–20 pong.

 Ο to make a short composite metal wire ο

Fill the wire into a metal container, or

Etc. ¾ be molded by integrally with the E to make an aggregate ₀

 This assembly is formed and sintered at room temperature to about 150 ° C.

Power ^Alpha, the Ru Oh at room temperature or al 1 0 ⁵ 0 ° C a temperature of approximately that, and press

Extruded with an output ratio of 2.0 or more to produce composite molded articles

And join some or all of the metal forming the parent phase

And then wire-drawing by cold working

Ο Depending on the processing, the series or V series

A wire rod containing a genus fiber structure in the matrix is obtained. Oh

As a means to obtain the final product wire from short composite metal wire

In addition to the above, there are two possible types.

Put in a melting crucible, and melt the metal of the parent phase.

OMPI

, After heating to a temperature below the melting temperature of the N¾ or V-based metal, it is mirrored into a mold to form a mirror block.o This is subjected to wire drawing by hot or cold working. One of the remaining methods is to collect a large number of short composite wires and press-mold them. Then, this compact is hot-pressed to a point near the melting point of the parent phase. Heating and pressurizing aside, a compact is obtained in which a large number of N¾- or V-based core wires are embedded in the matrix metal. This molded body is subjected to wire drawing by hot or cold working to obtain a wire rod.

System, 0 "a system, G ~ e system, Si system, S n type, - C _u systems, Ga - Cu system, - C _U-based, Si - C _U-based, Sn - juxtaposed Cu-based metal layer Preliminarily, the above-mentioned wire is coated with these metal layers by any suitable method. O Next, the above-mentioned wire is heat-treated and the above-mentioned metal layer is diffused to obtain a superconducting material. .

As the metal matrix, Cu - when using a Sn alloy, the concentration of Sn is - 1 5 Oyo long beauty 5 0 wt or more favorable Tekidea, or C _U - When using a Ga alloy. It is preferable that the concentration of, Al is 0.1-25 wt and 50 wt or more. In the case of using D and Cu alloys, the concentration of _Al is preferably 0.1-10 wt and more. In addition, alloys, Cu-Sn alloys, -Ga alloys, and Gu-alloys are at least a few of the metal elements such as Pb, In, Ga, Mn, Mg, and Sn. May contain 0.1 to 50 wt. Of a kind of elemental element o

OMPI Contact, in the above description, making the current combined in a number of short composite wire, C _U based, Cu - Sn alloy system, Cu - Ga alloy system, Cu -. Alloys based metal Konahitsuji or fibers O Can be added in shape o

 BRIEF DESCRIPTION OF THE DRAWINGS

 FIG. 1 is a cross-sectional view of a composite metal wire in an embodiment of the present invention, FIG. 2 is a cross-sectional view of a superconducting wire in an embodiment of the present invention before heat treatment for forming a superconducting compound, and FIG. Fig. 4 shows the relationship between the critical current value and the strain at 4.2 K and 10 Tesla in the embodiment of Fig. 4. Figs. 4 and 5 show the heat treatment for forming a superconducting compound of a superconducting wire in another embodiment of the present invention. FIG. 6 is a cross-sectional view of a composite metal wire according to another embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Example 1.

,, parent phase) Oh in force Cu i9 has by cormorants ¾ horizontal new plane shown in FIG. 1, the core wire (1) is N ¾ der Ru equidistant〗 9 Heart G _U - N b double coupling a multi-core wire was drawn in diameter 0, ² 4 Komoma. At this time, the average diameter and spacing of the N ¾ core wires were Q.03 and 0.015, respectively. This wire was cut to a length of about one thigh to form a short composite metal wire. Ο Next, a Cu container with an outer diameter of 80 females, an inner diameter of 72 dishes, and a length of about 0 β The short and long composite metal wires are filled as tightly as possible (filling rate of about 7 Q), and the ends are sealed by electron beam welding in a vacuum.

ΟΜΡΙ An aggregate of metal wires is formed and used as an extrusion bit, and the diameter of the extrusion is set to 16.0 and the extrusion temperature is set to 70 ° C by a hot extruder.

After extrusion, cold in diameter. 0.3 _OT or in drawing the o or exchanges Russia scan Tsu Lee to Teimetsu the scan door processing also easily line cormorants this and can be the o-ray ⁽⁴⁾ When the cross section is observed with a microscope, it has a structure in which N¾ fibers stretched in the longitudinal direction of the line exist in the Cu matrix, which has been metallurgically integrated.Ν¾ The diameter and spacing of the fibers may vary.

0.0 8—0.1 2 im. And Tsu by the heat treatment of this S n of about thickness on the surface of the wire (3) was deposited Tsu by the electroplated tools key (the cross section shown in FIG. 2) after ⁷ 0 0 ° C with 5 0 hours O Diffusion of Sn into the inside of the wire to form N 3 Sn on the surface of N ¾ fiber

The critical current characteristics of the N¾3SII wire thus obtained were measured under various conditions in liquid helium. O The measurement was performed by applying a 10-tesla bias magnetic field to the wire. a given Geni Yo Ru strain Θ to S _n wire but shows the RaKotsu o result in FIG. 3 curve (a). For comparison, the figure also shows the ultrafine multifilamentary fiber (curve B) measured under the same conditions and the characteristics of the discontinuous fiber wire prepared by the conventional method (curve C). According to the measurement results, the wire of the present invention showed a critical current value in strain zero that exceeded the value of the continuous fine-filament multifilamentary wire, and reduced the critical current value in strain zero. Contact was maintained at distorting the 2, Yakadea Ru _c loose is reduced even when more distortion paired - way, the critical current谊with FRP multifilamentary core wire strain 5% or more of a line B is Suddenly

OMPI The critical current value of the wire of the present invention is low for all strains. Thus, the wire of the present invention has a superconducting property. And excellent mechanical properties o

 Example 2.

Was prepared in the same manner as in Example 1, about the length〗 - 1 0 »matrix in diameter ^0.1 8 Face; ^ C u, 3 7 size and spacing of the mean heart N ID cord each α ι door, 0.006 _Micromax of short composite metal wire outer diameter 8 0 Ryu inner diameter 2 Q舰, length 1 50 tO! 'of only densely packed that Ki out to C u steel container (filling of about 80% ) As an extrusion billet, a hollow pipe with an outer diameter of 20 _{m and an} inner diameter of 8 dragons at an extrusion ratio of 19 and an extrusion temperature of 7 (3 Q ° C) was produced by a hot pipe extruder. It was extruded into a looped. in Tsu by the extrusion wire rod C _U in the matrix phase is fibers stretched in N Wa integrating tissue blood in metallurgical lifting interspersed. Next, the path b Bed A 7.8-thigh Sn rod was inserted into the hollow part of the container, and a Ta pipe with an outer diameter of 21 plates and an inner diameter of 21 dragons was used as a Sn diffusion barrier. Outer diameter 3 3 _WM Inner diameter

2 3 After coating the dragon Cu Pas Lee Bed (the cross section shown in FIG. 4) o This This was in 0.8X ¹ .6 thigh of the rectangular line One by the cold Shin鎳machining an integral The wire thus obtained was subjected to a heat treatment at 700 ° C for 50 hours, whereby the _SN arranged at the center of the wire was diffused and stretched into a fibrous shape. and n ¾ ³ S _n superconducting wire surface with a Cu layer for stabilization to generate Nb SS n of which the critical current especially in liquid f Li U beam in the seed s condition

OMPI Very good superconducting and mechanical properties were obtained as in Example 1 as a result of the measurement of the properties.o

Example 3.

 Mother phase Cu-T4t ^ Sn-?]? A 19-core (Cu-Sn) -N¾ compound multi-core fiber with N 心 core is O.24 TO The wire was drawn. The average diameter and spacing of the Nb cores at this time are respectively

 This wire, which was 0.03rai and 0.015 roi, was cut to a length of about 5-10m to obtain a short composite metal wire.

 A large number of these short composite metal wires are assembled, and the diameter is 8 G vm and the length is

After blanking Les scan molding 1 ⁵ 0 thigh bar-shaped, the o extrusion was extruded to a line of diameter 2 5 mm in extrusion conditions at the extrusion ratio〗 0.2 extrusion temperature 3 50 One by the hydrostatic extruder Tsu and wire rods C _U integrated in metallurgical - outside diameter as the S n alloy matrix ¾ was stretched fibrous while has a Kumi緣interspersed o then a diffusion barrier on the wire 2 7 mm, T a path i blanking of internal diameter 2 et舰, outer diameter ^{3 4} thigh for stabilization between the inner diameter 2 8 and therewith an body covering the C _U pipes of female cold working and 4 (3 (3 ° C, 1 hour of annealing Ku!) returns to this and in Tsu by the diameter 0.5 to 5 MI _{wire 0} obtained by cormorants this was a wire of ⁷ 0 0 ° C, 5 the heat treatment of the 0 hour is added Tsu by the and this argument stretched on the surface of the n ¾ to generate n 3 S n and N¾ ³ S _n superconducting鎳材with C 'layer for stabilization fibrous , This is a liquid medium The critical current characteristics were measured in the same way, and as in Examples 1-2, very good superconducting and mechanical properties were obtained.

OMPI

WIPO. In this example, the Sn concentration of the parent phase Cu-Sn alloy in the composite metal wire was from 0.1 to 15 wt%, and from 50 to 100 wt%. It is possible to reduce the cross section later. J? Anything else could not be processed.

 Example 4

The metal core wire that Ru pressurized et al and 37 present embedded in the matrix C u or et ing Cu - N¾ average of the composite multi-core wire was diameters 0.2 ⁴ «or in drawing o this preparative-out of New ¾ core The diameter and the distance between each other are 0.02 and 0.01 respectively. This wire was cut to a length of 1 to 5 Mi, and the resulting -N¾ short-length composite wire was cut over the entire surface including the cut portion. to I]?, about the thickness One by the can bar Le Le electrical flashes that by the commercially available pin b-phosphate bath is found after the deposition of the C u to a thickness of about 0. ⁵ ^ in in the C _U - 8 0 to facilities the-out alloy flashing of wt% S n Next, the outer diameter 8 G dragon, inner diameter 2 0 _m, just by Ki out to C u made 'container length 1 5 Q-tight and Takashiko to, extrusion City and bi-les Tsu DOO, then, extrusion ratio Tsu by the Netsukanpa Lee flop extruder I ^9, the outer diameter 2 G «under the conditions of extrusion temperature 7 0 0 ° C, the inner diameter 8 It was extruded in the shape of a hollow thigh tube. By extrusion, the wire has a structure in which N¾ is stretched into a matrix mainly composed of Cu and is dispersed in a fibrous form. The Cu-Nb before extrusion and the short composite wire are metallurgy. Next, a Sn rod with a diameter of I 8 mm is inserted into the hollow part of the pipe, and an outer diameter of 22 mm and an inner diameter of 21 mm are used as a diffusion barrier for Sn. The outer diameter of the pipe is 33 for stability and the inner diameter is 2 3 after coating the Cu path i parts, wire which was obtained in the jar good o This was a flat rectangular wire of 0. 8 X 1. ⁶ rot in Tsu by the cold HazamaShinsen processed an integral By applying a heat treatment at 70 Q ° C for 50 hours, the Sn located at the center of the line is diffused, and the N¾ non-continuous fiber stretched into a fibrous form is obtained. by generating a ¾ ³ S II on the surface to create a N¾ ³ S n superconducting wire having a C _U layer for stabilization, the critical current at the species' s condition in which the ^4.2 liquid f Li c in beam of K As a result of measuring the characteristics, very good superconducting characteristics and mechanical characteristics were obtained as in Example II.

As shown in Fig. 1, Nine metal core wires (1) were buried in a matrix (C) consisting of〗 9 pieces to obtain a Cu-N 多 composite multifilamentary wire. heart. line the average size and spacing of 0.1 ⁸ or in drawing the o this city-out of N core wire (1) has one der 0.0 ² m and 0.0 1 OTI. Next, this core wire (1) is cut into a short composite metal wire so as to have a length of about 1 to 15 rat, and then the short composite metal wire is collected and pressed. performed, diameter ³ 0 W! L, length ³ 0 0 ∞ obtain a rod-shaped body of the o then, the porous molded ¾ and baked 3 Q min sintering at a temperature in a vacuum 8 Q 0 the rod-like body The molded body was immersed in a Sn bath maintained at about 5 G (3 ° C) for about 5 minutes to allow Sn (3) to penetrate into the molded body, and further to the molded body. outer diameter 3 4 ηπ, inner diameter 3 2 »T _a pipe (5) having an outer diameter of 5 0 _m internal diameter 3 5 thigh to the covering both stabilized on the T a path Lee Bed as a purpose the C u (The cross section is shown in Fig. 5).

ΟΜΡΙ WIPO Be), to obtain a鎳材of Gyoru have diameters 5 _∞ the diameter reduction at cold. In this wire drawing process, no breaks occurred, and when the cross section of the obtained wire was observed with a microscope, it was found that N ，, Cu, Each fiber of Sn formed a wire in a mixed state o

Finally, more and facilities this heat treatment 2 0 minutes to the resulting wire rod at 8 0 0 ° C at step, the by generating the N ¾ ₃ S _n on the surface of the N ¾ fibers N ¾ SS _n compound superconducting wire O manufactured

 When the critical current value of the obtained superconducting wire was measured in liquid helium under various conditions, extremely good superconducting properties and mechanical properties were obtained as in Example 1. O Example 6

As shown in Fig. 6, 19 metal core wires (1) consisting of 19 cores are buried in a matrix consisting of Cu, and Sn is placed on this in an electric circuit. The composite multifilamentary wire with a diameter of 0.28 was obtained. The N ¾ cores at this time (1) The average diameter and the mutual interval were 0.03β and 0.015, respectively. Next, this core wire (1) is cut into a short composite metal wire with a length of about 13, and then the short composite metal wire is cut into an outer diameter of 20 mm. «, Inner diameter 18 recommended, Ta 0 length of 100 0'0 mm is filled at a filling rate of about ⁷⁰ %, and at the same time, this Ta pipe ³ 2 An old, inner diameter of 22 dragons should be introduced into a Cu pipe with the aim of stabilization, and the diameter should be reduced in the cold.] A 0.5-dragon-diameter lumber was obtained. 0 In this wire drawing process, no wire breakage occurred. When the cross section of the obtained wire was observed with a microscope, the N¾, Cu, and Sn fibers formed by stretching in the longitudinal direction of the wire were combined to form a wire in a mixed state. The diameter of the N 繊 維 fiber and the distance between them were 0.1-0.3 im.

 Finally, the wire obtained in the above process was subjected to a heat treatment at 850 ° C for 10 minutes to form N¾3Sn on the surface of the N fiber.

N b 3 S _n compound superconducting wire o this of the obtained superconducting wire was produced, this filtrate and was subjected to measurement of a critical current value at the species' s condition in the liquid F Li © in-time having a layer, and examples〗 Similarly, very good superconducting and mechanical properties are obtained, and ft o

Example 7

Matrix force;? C u - 1 0 wt S n der j 'll, lines N b - 4 wt H f der Ru 1 9 hearts _{(C u - S n - G} a) - (N ¾ - H f) composite multi-core wire with an average diameter of 0.1 1 m, length 3 mm OC _u - and 1 5 wt fiber diameter 0.1 alloy ^{1 2} or in Shin鎳. At this time, the diameter and interval of the core wire are 0.015 dish and G.008 TOT, respectively. ± o This wire is cut to a length of 1-5 mm, and the wire is cut with a short composite metal wire. did. A large number of short composite metal wires were preformed with a hydraulic press, and then formed into a rod with a diameter of 30 mm and a length of 10 G- by hot pressing in a vacuum at 950 ° C.違続to C _U was in Tsu by the sintered o this process is integrated in the metallurgical - S n Go gold及-.. beauty - was stretched to纖維like to u Q a alloy matrix phase N ¾ - this then ₀ tissues alloy interspersed obtain

O PI Cold working and annealing at 400 ° C for 1 hour were repeated to form a wire with a diameter of 3.

 The diameter and spacing of the Ν の -Hf alloy fibers are about 0.15 m, respectively.

 It was 0.08 Am. The wire obtained in this way was set at 750 ° C,

Heat treatment for 50 hours generates (N¾-Hf) 5Sn on the surface of the N¾-Hf alloy fiber, and the critical current under various bias magnetic fields in liquid helium is increased. measured o As a result, H _f及beauty ¹ 2 Te scan la or more high magnetic field as compared to the addition Shinano have wire about 2 0 critical current density is improved o

 Example 8

Length approx. ¹ », diameter created in the same way as in Example 1

0.2 4 each matrix causes the diameter and spacing of C u, 1 9 mind N ¾ cords 0.0 3 _beta in鲰, average particle size of 0.0 1 5 short composite metal wire «

The 4 0 im of Cu Konahitsuji by volume 7: After thorough mixing at a ratio of 1, the outer diameter 8 0 _Eta, inner diameter 2 0 _Eta, only tightly that Ki out to C u container made of length 1 5 0 _beta filled to extrusion bi les Tsu preparative and extruded ratio Tsu by the hot pipes extruder〗 9, the outer diameter 2 0 WM under the conditions of extrusion temperature 9 0 0 ° C, the hollow path Lee Bed shaped inner diameter 8 _beta After extruding into a hollow part, the rod was inserted into the hollow part, and the N¾3A wire was formed by cold working and N¾5A generation heat treatment. Example also when molding without adding

 A compound superconducting wire with good cold workability and excellent superconductivity was obtained as in 0.

Example 9

OMPI

WIPO Length created in the same manner as in Example 1 1-5 breaks, diameter

The matrix force at 0.24 am; Cu-18 wtG a]]}, 19, V, wire diameter and spacing are 0.03 peng, 0.015 mm short composite metal wire, diameter 8 0 _m, and extruded to a diameter of 2 5 thigh line under the condition of length 1 5 0 bar-shaped _∞ Tsu by the hot extruder after blanking Les scan molding extrusion ratio 1 0.2 extrusion temperature 5 5 0 ° C . By extrusion, the wire has a structure in which fibrous stretched Vs are scattered in a metallurgically integrated Cu- & a alloy matrix. In addition, this wire was cold-worked and repeatedly subjected to 4 GQ ° (1 hour annealing treatment) to form a cage with a diameter of 0.3. The diameter and spacing of the V fibers at this time were about 0.08 Am The wire thus obtained was subjected to a heat treatment at 65 0 for 50 hours to produce V 3 G a on the surface of the V-fiber and V 3 G a As a superconducting wire, the critical current characteristics were measured under various conditions in liquid helium.

N b 3 Sn wires the same superconducting properties and excellent V 3 S n wire mechanical properties were obtained ₀

Example 10

 It has a cross section as shown in Fig. 2 and the parent phase is Cu.

 120, a 120-core C-N ¾ multi-core wire with N cores was drawn to 0.5 OT! O The average diameter of the N 心 core at this time was about 30 O This wire was cut to a length of 10 mm or less to form a short composite wire. Ο Next, a number of short composite wires were placed in a graphite crucible, and high-frequency in a vacuum. Dissolves, about

 Insert into mold at 130 ° C, with diameter of 80 wm and length of 50 Q

OMPI

, O The volume ratio of N に お け る in this mass is approximately 50 vo ^% with respect to C _U ! ), Which was about twice that of the conventional method. Also, the weight is approximately 2 2.1 ^ der of Kagamikatamari]?, Ah Ru about〗 0 times in a weight ratio of Kagamikatamari obtained a conventional C _U and N arc melting. During melting, N ¾ maintained the core shape and C _U and Ν¾ did not cause any reaction that would hinder the later processability. O No special equipment or device was required for melting and forming. Therefore, according to the method of the present invention, it is possible to obtain even larger lumps by using the crucible and the method according to the present invention. It is easily possible by selecting the size of the mold. Observation of the cross section and vertical section of this ingot shows that the specific gravity of Cu is 8.93 and 8.6, respectively, and there is a large difference between them, so that gravity segregation does not occur, and the N¾ core and C _U The mixed state of the mother phases and of

-7C o-Next, this ingot is drawn by cold working to a diameter of α3 dragons, and a final ² Om thick Sn is electrodeposited on the surface of the wire. Heat treatment under various conditions of 0 ° C to 85 ° C and 1 to 200 hours produces N¾ ³ Sn on the surface of the embedded Nb core wire with an average diameter of about 0. to, ₀ where N I SS n superconducting wire

 In addition, by extruding the cylindrical mass, the outer diameter is reduced.

 A 30 MM tube with an inner diameter of approximately 0 dragons. After inserting Sn at the center, covering the Cu tube for stabilization on the outside and the Ta tube for the diffusion barrier, As a whole, the wire was drawn to a diameter of 0.5 mm. O This was also heat treated under the same conditions as above.

O PI

V '. And facilities, is a N 3 Sn superconducting wire and the ₀ the other path Lee blanking process, but elaborate篛directly Pas Lee flop shape Tsu good as etc. centrifugal mirror granulation method D, and mechanical drilling a篛塊It can also be made into a pipe shape o

 The critical current characteristics of the above two types of wires were measured under various conditions in liquid helium. O As a result, very good superconductivity and mechanical characteristics were obtained as in Example II.

Example 1 1

 The matrix force was Cu-5wt% Ga, and the core force was V, and a 120-core Cu-Ga-V composite multifilamentary wire was drawn to a diameter of 0.5.

This wire was cut to a length of 1 O TOI or less to obtain a short composite wire. O Next, a number of short composite wires were melted in a high-frequency furnace in a vacuum and mechanical vibrations were applied. Go

Using the Cu-Ga alloy as a parent phase, a lump having a structure in which a large number of V-core wires are embedded was obtained. N ¾ cord with the addition of mechanical vibration to molten metal and C u - CJ a mixed state of the mother phase is a ₀ this鐃塊was Tsu der very uniform hot working (2 0 0 - 5 0 0 ° C) and repeated cold working and soft annealing, wire drawing up to 0.3 mm in diameter, apply da on the surface of the wire, and apply VSG at 60 ° C for 50 hours. a V5 Ga superconducting wire after heat treatment was applied. o Superconducting properties were measured under various conditions.

 Good results were obtained as in o

Example 1 2 In the Cu matrix shown in the cross section in FIG.

OMPI WIPO The Cu-N¾ composite multi-core wire with the N¾ core wire buried is made to have a diameter of 0.5 MI by wire drawing, and this wire is cut to a length of 1 O jm or less and cut short. the composite wire one attracted short composite wire made by o this by the hydraulic blanking less]) was pressure at room temperature for 1 Bruno COT ^2, 0 this preliminary that the molded bodies with a diameter of 9 0 m length 2 QQ Como The compact was pressed in a vacuum at a melting point of the Cu matrix phase at a pressure of 0.2 ^ at a high temperature of 1110 ° C to produce a high-density compact. Microscopic observation revealed that the feature was dense and free of pores, and that the N N core was homogeneously dispersed in the Cu matrix phase.

Next, this compact was formed into a rod shape with a diameter of 30 by cold forging, and then drawn by cold drawing.] 9 It was drawn to a diameter of 0.3 ». During wire drawing 'Remind as in Figure 2 to C _U N ¾ cord in the matrix is only cormorants uniformly deformed, the surface of the wire of o this to be stretched along the direction of drawing about 2 0 iin thickness S _n after the electrodeposition ^{6 0 0 ° C- 8 5 ·} 0 ° C, 1 to - to facilities heat-treated at 200 hours species' s condition, embedded in C u matrix phase has been an average diameter of about 0. 0 9 m in Tsu by the Sn solid diffuse to the surface of the n core wire to produce a N¾ 5 S _n, the n _b 3 S n compounds superconducting wire o this wire was prepared Also, the same good characteristics as in Example 1 were obtained. In an embodiment of this, process of pressurizing the Nlo cores in C _U E mother short composite wire embedded in the phase Tsu preparative Bed Les scan high by the melting point of the matrix metal by the 1 1 1 Q ° C is Kana Razz Mr. also rather Haru data of Gill or the method by that in the present embodiment, the melting point of C _U matrix Below 1 GQ ° C to above the melting point〗 Pressing in a temperature range of QG ° C and applying a heat cycle in the above temperature range under a constant pressure and press forming. Alternatively, a method in which the pre-sintered body subjected to the hydraulic pressure is heated to a temperature higher than the melting point of the parent phase to perform the melt sintering can produce the same effect as in the present embodiment.

Also, N¾ core of C _U outside the matrix phase short composite wire embedded in at host Tsu preparative Bed Les scan size 9 Q m, to create a shaped body of an inside diameter 3 O OT, the hollow extruded City accordingly the Chi Thus, a tube material with an outer diameter of 30 mm and an inner diameter of 10 TO was prepared, a Sn rod ( ³ ) was inserted in the center, and a diffusion barrier of a Ta tube (5) and a copper tube ( ² ), And as shown in Fig. 4, the cross-sectional structure is integrated with the wire, and the wire that has been reduced in cross-section to 0.5 mm in diameter is subjected to the same compound generation heat treatment as in the above example. In this case, the same current characteristics as in the above embodiment can be obtained.

Example 13

'-Cu-5 wt In the mother phase; the Cu-Ga-V composite multifilamentary wire, in which 120 V cores are buried, is made 0.5 m in diameter by wire drawing. A short composite wire with a length of 10 mm or less was produced by cutting this wire. I a short composite wire this to the same manner as in Example _{1 2 C u - 5 wt G} a solidus temperature〗 of matrix 0 4 0. (To prepare a pressurized et liquid phase temperature 1 0 7 Q ³ C of the solid-liquid coexisting region E Tsu preparative blanking and by pressing the record scan by molding. The molded body 'Hiyakanmizo b Lumpur rolling and Shin The wire was drawn up to a diameter of 0.3, and & a was electrodeposited on the surface of this wire by a thickness of about 15 Am.

OMPI 5 0 h V 5 (J _a product heat treatment facilities to V 3 G a compound than electrodeposition wire of o this of manufacturing a lead results of measurement of the superconducting properties under various conditions for a, the actual β Example〗 It has been confirmed that good characteristics can be obtained ο

 In the above embodiment, in the process of forming a molded body by collecting a large number of short composite wires, Cu system, A system, Ga system, & e system, Si system, Sn system, C system The addition of metal powder or metal fiber of u-Α · ^ system, Cu-Ga system, Cu- (Je system, Cu-Sn system, Cu-Si system, An industrial means that is effective in improving the characteristics by adding Ti, Ta, Hf, and Zr to N¾ or V, which is the high melting point component used in the core wire. In addition, the method for producing a compound superconducting wire according to the present invention is based on N 化合物 5A, Nb5Ga, and N¾5Ge, which are compound superconducting wires other than N¾3Sn and VSGa wires. , Y 5 At, V3S i

 It can be applied to any manufacturing.

OMPI

Claims

 The scope of the claims

 (1) A process to obtain a composite wire by embedding a metal core wire of either b-system or V-system in a matrix made of a metal that can be easily deformed, and cutting this composite wire. Collecting and forming a large number of short composite wires obtained in this way to obtain a wire rod containing a fiber braid composed of N¾-based or V-based metal, and subjecting this wire to heat treatment to produce a superconducting compound A method for producing a compound-based superconducting wire, comprising the steps of:

(2) the matrix phase C _U based, Sn-based, system, Ge-based, A type, Si-based, C u - S n alloy systems, C _u _ G a alloy system, G u - de alloy systems, cu - The method for producing the compound superconducting wire described in item 1 of the patent request, which is characterized in that at least one of the A alloy system and the Cu-Si alloy system is made of at least one metal, ) used in the above mother phase C u - S ii alloy systems, C u - G a alloy system, C u - G _e alloy systems, C u - a alloy systems, C u - S i alloys based metal is C u饞度⁸ 0 -. ^{9 9} process for the preparation of a compound based greater electrostatic conductor material claims second term according to Toku徵the this Ru der 'o

(4) By adding In, P¾, Mn, Sn, Ga, Al, Mg, etc. to the above matrix as a simple substance or as an alloy, mechanical properties or superconducting properties can be improved. And a method for producing a compound superconducting wire according to claim 2. (5) In the method described in Claim (2), at least a part of a wire rod containing a fiber structure composed of an N¾-based or V-based metal is Sn-based or 'Ga-based. , Ge-based, Si-based, Sn-Cu-based, Ga-Cu-based, Ge-Cu-based, A-Cu-based, Si-Cu-based A method for producing a compound-based superconducting material characterized in that at least one kind of metal layer is formed in close contact.

. C u alloy system, G a - - (6) above parent phase and to S n of Ru with C u alloy system, G _e - C _u alloy system, A - C _U alloy system, S i - C u if 3. The method for producing a compound-based superconducting wire according to claim 2, wherein the gold-based metal has a Cu concentration of 0 to 50 ^wt .

 (7) The wire rod containing a fiber composed of a 13 series or V series metal can be used to form a compact consisting of a short composite wire in the range of room temperature to 1050 ° C. The method for producing a compound-based superconducting wire according to claim 6, wherein the cross-sectional reduction is performed at a temperature, and then the cross-sectional reduction is performed in a cold state. Method o

 (8) A wire rod containing a fibrous structure composed of N-type or V-type metal should be prepared by reducing the amount of any metal that forms the powdery or fibrous matrix in the short composite wire. A method for producing a compound superconducting wire according to claim 1, characterized in that the compound superconducting wire is formed by adding at least one or more kinds.

(9) Either the N N or V metal core can be easily changed. A step of obtaining a composite wire by embedding it in a matrix formed of a metal that can be formed, a step of cutting the composite wire and forming it again to obtain a porous formed body, molten body S n or S n - C u alloy or da or G _a

- C _U alloys, or G e - C _u alloys, or A i - alloys, S i or S i - sectional scaled down after impregnated with C u Had the Hare Chi least for the alloys Zureka one metal A method for producing a compound superconducting wire characterized by including a process and a step of performing a heat treatment o

αο The step of obtaining the porous molded body is characterized in that the cut composite wire is collected, pressed, and sintered at 150 ° C to 150 ° C. The method for producing a compound-based conductive wire according to item (9). A process to obtain a composite wire by embedding a metal core wire of either αΰ ΰ 系 system or V system in a parent phase made of metal that can be easily deformed, and cutting this composite wire Attach metal that can be easily deformed to at least the cut part of the short composite wire obtained by processing, and collect and form a large number of these short composite wires to form Ν- or V-based metal. A method for producing a compound-based superconducting wire characterized by including a step of obtaining a wire containing the fiber assembly and a step of subjecting the wire to heat treatment to form a superconducting compound.

& 2) as a metal to adhere to the cut portion of the mother稆your good beauty short composite wire, C u system, S n system, G a system, G _e system, A _ system, At least some of Si-based, Sn-Cu-based, Ga-Cu-based, Gθ-Cu-based, A ^ -Cii-based, and Si-Cu-based The method for producing a compound-based superconducting wire according to claim αΐ), characterized in that it comprises one or more metals.

 (L3) The compound system according to claim (11), wherein the heat treatment for forming the superconducting compound is performed at a temperature of 5 (30-105 fl ° C). Superconducting wire manufacturing method o

 U High melting point component of superconducting compounds N-based or V-based

 A step of embedding one of the metal core wires in a matrix made of a metal that can be easily deformed to obtain a composite wire, a step of cutting the composite wire and then reassembling the composite wire; Melting the aggregate at a temperature above the melting point of the parent metal and below the melting point of the core metal to obtain a cylindrical mass, and a process to obtain a wire by reducing the cross section of the mass. A method of manufacturing a compound superconducting material characterized by including a step of subjecting a wire to heat treatment.

(13 the matrix phase C u system, C u - S _n system, C u - G a system, C _u - G e system, C u - A system, C u - cormorants Chi small ¾ of S i based metal layer The method for producing a compound-based superconducting wire according to claim 4), which is characterized by being composed of at least one kind of metal.o (16) Cu-S used as the mother phase _n alloy, Cu-da combination

Gold-based, C _u - G _e system, C u - A alloy system, C u - in S i alloy system, concentration force 9 0 C - and Oh Ru this at 9 9. 9 w ΐ

Ο ΡΙ IPO A method for producing a compound superconducting wire according to claim M

ατ) A metal layer containing at least 50 wt% of the low melting point component of the conductive compound on the surface or at least a part of the inside of the wire obtained by reducing the cross section of the 铸 lump. The method for producing a compound superconducting wire according to claim M, wherein a superconducting compound is formed by attaching and heat-treating the compound.

as claimed in claim (L), characterized in that ultrasonic or mechanical vibration is applied to the molten metal in the step of melting and forging an aggregate of a large number of cut composite wires. Method for manufacturing compound superconducting wire o

A core consisting of a high-melting-point metal or a V-series metal, which is a high-melting point component of a compound superconducting substance, is embedded in a matrix of a metal that can be easily deformed. A step of obtaining the wire, a step of cutting the composite wire and then assembling it again, a step of press-forming this aggregate near the melting point of the parent metal, and a step of reducing the cross-section of the formed body. A method of manufacturing a compound superconducting wire characterized by including a step of performing a small working and a step of performing a heat treatment on the compact whose cross-section has been reduced as described above.ο (20) The metal matrix which can be easily deformed is Cu At least one of the following metal layers: C α -A system, C u -G a system, C u-& e system, C u -S i system, and C u -S η system metal layer. The compound-based superconducting wire according to claim tt9, which is characterized in that Material manufacturing method ₀

(21) C with a metal matrix that Ru said deforming easily u - A ^ system, C _U - based, C u - G e system, C u - S i based, C u - in are in the S n system C u concentration Ca ⁹ 0 - 9 ^9.9 wt path over cell manufacturing method of the compound-based than conductive wire material down preparative Oh Ru this and claims a ¾ claim wherein o

 (22) At least at least a part of the surface or inside of the aggregate embedded in the parent metal in which the high melting point component metal of the compound superconducting material is easily deformed, and the low melting point of the compound superconducting material is used. At least any of the point components A, G a, Q θ, S i, and S n

— Claims ⁹ ) characterized in that at least 5 G weight percent of the component metals are juxtaposed, and then a compound superconducting material is formed by heat treatment. Method for manufacturing compound superconducting wire described in section o

 (23) The assembly in which the high-melting-point component metal of the above compound superconducting material is embedded in the parent metal, which can be easily deformed, is changed from 100 ° C below the melting point of the parent metal to 100 ° C. A method for producing a compound superconducting wire according to claim 1, characterized in that the molding is carried out under a constant temperature or at a temperature that changes at a temperature within a range not exceeding ° C.

(24) · The high melting point component metal of the compound superconducting material is a parent metal of Cu-A, Cu-Ga, Cu-, Cu-Si, or Cu-Sn. The aggregate buried in the solid phase is pressurized in a solid-liquid coexist The method for producing a compound superconducting wire according to claim ^, characterized in that it is shaped. O

OMPI IPO