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Method for preparing reinforced biaxially textured Ag based compound substrate

A composite baseband and texture technology, 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: 2009-01-21
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

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  • 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%, 2.5mm thick Ag foil with a purity of 99.95wt%, 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 multi-layer ingot; vacuum anneal the multi-layer ingot at 750°C for 6 hours; then cold-roll, the deformation of each pass is 10-15%, and the total deformation is greater than 95%, and the obtained 300μm Thickness of baseband. Then the base tape was annealed in vacuum at 800°C for 3 hours. A surface silver texture {110} is formed, see Figure 1. In Figure 1a, φ=45°, The concentrated distribution area of ​​the intensity indicates the {110} texture, the ODF value reaches 45, and the composition is single. The pole figure FWHM of the (111) plane is 15° (Fig. 1b). The as-prepared base tape was annealed at 900 °C to test the stability of the air texture. The results show that the texture of the base tape has good stability, and the ODF value of the {110} orientati...

Embodiment 2

[0019] Example 2. Ni casting ingot with a purity of 99.99wt%, Ag foil with a thickness of 1mm of 99.95wt% and Cu foil with a thickness of 40μm with a purity of 99.99wt%, arranged in the order of Ag-Cu-Ni-Cu-Ag , obtained a 3mm multi-layer ingot by cold pressing; the multi-layer ingot was vacuum annealed at 800°C for 5 hours; then cold-rolled, the deformation of each pass was 10-15%, and the total deformation was greater than 95%, and a thickness of 100 μm was obtained. baseband. Then the base tape was annealed in vacuum at 800°C for 4 hours. The surface silver texture {110} is formed, as shown in Figure 2, and the composition is single; the composite substrate has good bonding.

Embodiment 3

[0020] Example 3. The Ni ingot with a purity of 99.99wt%, the Ag foil with a thickness of 3.5mm of 99.95wt%, and the Cu foil with a thickness of 100 μm with a purity of 99.99wt%, are arranged in the order of Ag-Cu-Ni-Cu-Ag, The 8mm multi-layer ingot is obtained by cold pressing; the multi-layer ingot is vacuum annealed at 800°C for 6 hours; then cold-rolled, the deformation of each pass is 10-15%, and the total deformation is greater than 95%, and the thickness of 50μm is obtained. Baseband. Then the base tape was vacuum annealed at 900°C for 6 hours. The surface silver texture {110} is formed, as shown in Figure 3, and the composition is single; the composite substrate has good bonding.

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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 99.95wt% to fuse and make initial ingot castings of Ni, Ni0.96V0.04, and 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 3-8mm; wherein, both the purity of Ag foil and Cu foil are more than 99.9wt% and have thickness separated of 1mm-3.5mm and 40-100um; 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 strengthened Ag-based composite baseband, and belongs to the technical field of 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 link to realize 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. 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 and more mature, and has been initially applied in some countries. Silver is the only base metal that does not ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P23/04H01B13/06H01B13/00
Inventor 索红莉赵跃周美玲刘敏刘丹敏
Owner BEIJING UNIV OF TECH
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