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Method for preparing reinforced biaxially textured Ag based compound substrate

A composite baseband and texture technology, which is applied in other manufacturing equipment/tools, manufacturing tools, cable/conductor manufacturing, etc., can solve the problem of no biaxial texture on the surface of the baseband, achieve enhanced mechanical properties, reduce Ag content, The effect of strong mechanical strength

Inactive Publication Date: 2005-11-30
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, research groups at home and abroad are conducting research on coating high-temperature superconducting films on composite substrates. Some Ag alloys or Ag-Cu composite substrates have been studied for biaxially textured coated conductors, but on the surface of these strengthened substrates No single stable {110} biaxial texture is formed, which limits the direct deposition of YBCO superconducting thin films on the substrate

Method used

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  • Method for preparing reinforced biaxially textured Ag based compound substrate
  • Method for preparing reinforced biaxially textured Ag based compound substrate
  • Method for preparing reinforced biaxially textured Ag based compound substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1. Ni ingot with a purity of 99.99wt%, a 2.5cm thick Ag foil with a purity of 99.95wt%, a 50μm thick Cu foil with a purity of 99.99wt%, in the order of Ag-Cu-Ni-Cu-Ag Arrange and cold-press to obtain a 6mm multilayer ingot; vacuum-anneal the multilayer ingot at 750°C for 6 hours; then cold-roll, the secondary deformation is 10-15%, and the total deformation is greater than 95% to obtain a thickness of 300μm Baseband. The base tape was then vacuum annealed at 800°C for 3 hours. The surface silver texture {110} is formed, see Figure 1. In Figure 1a,  1 =90°, ф=45°,  2 The intensity distribution area of ​​=0° indicates the {110} texture, the ODF value reaches 45, and the composition is single, and the pole figure FWHM of the (111) plane is 15° (Figure 1b). The final base tape obtained was annealed at 900°C to test the stability of the gas texture. The results show that the texture of the baseband has good stability, and the ODF value of the {110} orientation after an...

Embodiment 2

[0019] Example 2. Ni ingot with 99.99wt% purity, 1cm thick Ag foil with 99.95wt% purity, 40μm thick Cu foil with 99.99wt% purity, arranged in the order of Ag-Cu-Ni-Cu-Ag After cold pressing, a 3mm multi-layer ingot is obtained; the multi-layer ingot is vacuum annealed at 800°C for 5 hours; and then cold-rolled, the secondary deformation is 10-15%, and the total deformation is greater than 95% to obtain a thickness of 100μm Baseband. The base tape was then vacuum annealed at 800°C for 4 hours. Formed surface silver texture {110}, see figure 2 , And the composition is single; the composite baseband has a good combination.

Embodiment 3

[0020] Example 3. Ni ingots with a purity of 99.99wt%, Ag foils with a thickness of 3.5cm 99.95wt%, and Cu foils with a thickness of 100μm with a purity of 99.99wt% were arranged in the order of Ag-Cu-Ni-Cu-Ag, A 8mm multilayer ingot is obtained by cold pressing; the multilayer ingot is vacuum-annealed at 800℃ for 6 hours; and then cold rolled, the secondary deformation is 10-15%, and the total deformation is greater than 95% to obtain a base tape with a thickness of 50μm . Then the base tape was vacuum annealed at 900°C for 6 hours. Formed surface silver texture {110}, see image 3 , And the composition is single; the composite baseband has a good combination.

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Abstract

This invention belongs to preparation field of high-temperature superconductive coating strengthened tough base band and is characterized in following comprised steps: use separated Ni, Cr and V power with purity more than 99.95wtúÑ to fuse and make initial ingot castings of Niú¼Ni0.96V0.04ú¼and Ni0.96 Cr0.02 V0.02; take cold compression to obtain ingot castings of multiple layers by the turns of Ag foil-Cu foil-Ni or initial ingot casting of Ni alloy-Cu foil-Ag foil with thickness of 3í½8mm; wherein, both the purity of Ag foil and Cu foil are more than 99.9wtúÑ and have thickness separated of 1mmí½3.5mm and 40í½100um; anneal in vacuum for 4~6h at 750Deg~800Deg; take cold rolling; pass deflection is 10~15%, total deflection is more than 95%; obtain base band with thickness of 50um~300um; for base band, anneal in vacuum for 3~5h at 800Deg~900Deg to obtain fit structure and final product. The invention has stable and sharp of double axis structure {110}<110> and compared with silver-based composite base band of high mechanical strength, simplifies technique and decreases cost.

Description

Technical field [0001] The invention relates to a method for preparing a reinforced Ag-based composite baseband and belongs to the technical field of the preparation of a high-temperature superconducting coating reinforced toughness baseband. Background technique [0002] Making high-temperature superconducting materials with ceramic brittleness into wires and strips is an important part of realizing their practical applications. In recent years, people have made great progress in the preparation of high-temperature superconducting long strips by depositing superconducting films on polycrystalline ductile metal substrates, and yttrium barium copper oxide (YBCO) with a length of hundreds of meters has been prepared. Superconducting strips are expected to be used in high-voltage applications; on the other hand, the technology of Ag-coated Bi-2223PIT strips is becoming more mature and has been initially applied in some countries. Silver is the only base metal that does not require a...

Claims

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Application Information

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IPC IPC(8): B23P23/04
Inventor 索红莉赵跃周美玲刘敏刘丹敏
Owner BEIJING UNIV OF TECH
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