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Multi-passage fast in-situ annealing method for biaxial textured nickel-tungsten metal base band

A metal-based tape and multi-channel technology, applied in the field of high-temperature superconducting tape preparation, can solve the problem that the speed of the tape is difficult to reach the kilometer-level long tape, and achieve the effects of accelerated annealing speed, high stability and repeatability

Active Publication Date: 2012-12-05
SHANGHAI SUPERCONDUCTOR TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the heat treatment requires the sample to be maintained at the annealing temperature for a certain annealing time (usually ranging from ten minutes to one hour), it is difficult for the strip to travel at a kilometer-level speed when annealing is performed with a single-channel transmission device. requirements

Method used

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  • Multi-passage fast in-situ annealing method for biaxial textured nickel-tungsten metal base band
  • Multi-passage fast in-situ annealing method for biaxial textured nickel-tungsten metal base band
  • Multi-passage fast in-situ annealing method for biaxial textured nickel-tungsten metal base band

Examples

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Effect test

Embodiment 1

[0042] This embodiment provides a multi-channel rapid in-situ annealing method for a biaxially textured nickel-tungsten metal substrate, which includes the following steps:

[0043] Step 1, winding one end of the biaxially textured nickel-tungsten metal base tape on the first reel;

[0044] Step 2, pulling the biaxial textured nickel-tungsten metal base tape to wind through the two rollers of the multi-channel transmission device;

[0045] Step 3, fixing the other end of the biaxially textured nickel-tungsten metal substrate on the second reel;

[0046] Step 4. Close the vacuum door of the coating system and evacuate to 1×10 -7 Torr;

[0047] Step 5, start the heater, and heat up to the required annealing temperature of 700 o C;

[0048] Step 6. Pass the argon-hydrogen mixed gas into the coating system, and control the total pressure at the desired pressure value; in the argon-hydrogen mixed gas, the volume ratio of Ar is 85%, and the H 2 The volume ratio of hydrogen is 1...

Embodiment 2

[0052] This embodiment provides a multi-channel rapid in-situ annealing method for a biaxially textured nickel-tungsten metal substrate, which includes the following steps:

[0053] Step 1, winding one end of the biaxially textured nickel-tungsten metal base tape on the first reel;

[0054] Step 2, pulling the biaxial textured nickel-tungsten metal base tape to wind through the two rollers of the multi-channel transmission device;

[0055] Step 3, fixing the other end of the biaxially textured nickel-tungsten metal substrate on the second reel;

[0056] Step 4. Close the vacuum door of the coating system and evacuate to 1×10 -6 Torr;

[0057] Step 5, start the heater, and heat up to the required annealing temperature of 900 o C;

[0058] Step 6. Pass the argon-hydrogen mixed gas into the coating system, and control the total pressure at the desired pressure value; in the argon-hydrogen mixed gas, the volume ratio of Ar is 97%, and the H 2 The volume ratio of hydrogen is ...

Embodiment 3

[0062] This embodiment provides a multi-channel rapid in-situ annealing method for a biaxially textured nickel-tungsten metal substrate, which includes the following steps:

[0063] Step 1, winding one end of the biaxially textured nickel-tungsten metal base tape on the first reel;

[0064] Step 2, pulling the biaxial textured nickel-tungsten metal base tape to wind through the two rollers of the multi-channel transmission device;

[0065] Step 3, fixing the other end of the biaxially textured nickel-tungsten metal substrate on the second reel;

[0066] Step 4. Close the vacuum door of the coating system and evacuate to 5×10 -7 Torr;

[0067] Step 5, start the heater, and heat up to the required annealing temperature of 800 o C;

[0068] Step 6. Pass the argon-hydrogen mixed gas into the coating system, and control the total pressure at the desired pressure value; in the argon-hydrogen mixed gas, the volume ratio of Ar is 90%, and the H 2 The volume ratio of hydrogen is ...

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Abstract

The invention discloses a multi-passage fast in-situ annealing method for a biaxial textured nickel-tungsten metal base band. The adopted atmosphere during the annealing is the mixed gas of argon gas and hydrogen gas, and a multi-passage transmission device is adopted, so the base band is wound for many times through a roller shaft to pass a heater, the annealing speed of the base band is greatlyaccelerated and can reach more than hundred meters per hour, and the method of the invention is suitable for the preparation of kilometer level long bands. The adopted atmosphere is the mixed gas of argon gas and hydrogen gas, the argon gas belongs to inert gas and mainly takes a buffer effect, the hydrogen gas is combined with oxygen atoms on the surface of the metal base band for forming water vapor, and a NiO layer arranged on the surface of the RABiTS base band is removed. The method of the invention has the advantages that the oxygen adsorbed on the metal base band and the formed surfaceoxide layer are thoroughly removed, and high stability and repetitiveness are realized.

Description

technical field [0001] The invention relates to a high-temperature superconducting tape preparation technology, in particular to a multi-channel rapid in-situ annealing method for a biaxially textured nickel-tungsten metal base tape during the preparation of a high-temperature superconducting tape. Background technique [0002] In 1911, Dutch scientist Onnes accidentally discovered that when metallic mercury was cooled to minus 268.98 degrees Celsius, its resistance suddenly disappeared, which was called superconductivity. He later discovered that many metals and alloys had similar superconducting properties. Because superconducting materials have ideal electrical conductivity without resistance, since the discovery of superconducting phenomena, scientists have been working hard to find superconductors at room temperature (room temperature or close to room temperature) for large-scale application and the benefit of mankind. Traditional superconducting materials are generall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/02C22F1/10C22F1/18
Inventor 李贻杰
Owner SHANGHAI SUPERCONDUCTOR TECH CO LTD
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