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single-coat thick oxide film

An oxide film, oxide technology, applied in coating, metal material coating process, liquid chemical plating, etc., can solve the problems of HTS coating failure, intermediate film cracks, etc.

Active Publication Date: 2015-08-19
AMERICAN SUPERCONDUCTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If not controlled, these stresses can lead to a large number of cracks in the resulting interlayer, which in turn leads to the formation of C HTS coating fails

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] Prepare the precursor solution as follows: add 6.0 grams of Y(CF 3 CO 2 ) 3 , 10.2 grams of Ba(CF 3 CO 2 ) 2 , 2.5 grams of Dy(O 2 CCH 3 ) 3 And 9.5 grams of Cu(CH 3 CH 2 CO 2 ) 2 Dissolve in 45 ml methanol and 1.5 ml HO 2 CCH 2 CH 3 in.

[0113] A slot die coater was used to deposit the precursor solution onto a continuous length of metal tape substrate.

[0114] The metal tape substrate is formed of four layers. The first layer is a deformed textured nickel-tungsten (5 atomic %) alloy with a thickness of about 75 microns and a width of about 46 mm. Deposit about 75 nanometers of Y on the nickel-tungsten textured surface 2 O 3 Epitaxial layer. In Y 2 O 3 A YSZ epitaxial layer (about 75 nm thick) is deposited on the layer. Deposit CeO on YSZ layer 2 The layer is an epitaxial layer (about 75 nm thick).

[0115] In H containing about 11 Torr 2 The precursor film is deposited in an atmosphere of O and the balance of nitrogen (total pressure is about 760 Torr). Coating weight ...

Embodiment 2

[0121] The intermediate film was formed in a manner similar to that described in Example 1, except that a single gas composition (water vapor pressure of 15 Torr) was used for processing. The thickness of the intermediate film is about 3 microns, measured by SEM cross-sectional analysis. Figure 5 This is an optical fiber micrograph (25 times magnification) of the film, showing that the film has many visually visible cracks.

Embodiment 3

[0123] The intermediate film was formed in a manner similar to that described in Example 1, except that a single gas composition (water vapor pressure of 28 Torr) was used for processing. Image 6 This is an optical fiber micrograph of the film (25 times magnification), showing that the film has many visually visible bubbles.

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Abstract

An article including a substrate and a layer of a homogeneous metal-oxyfluoride intermediate film disposed on the substrate, the intermediate film containing a rare earth metal, an alkaline earth metal, and a transition metal. The intermediate film has a defect density less than 20 percent and, upon thermal treatment, is capable of converting to a homogeneous rare earth metal-alkaline earth metal-transition metal-oxide superconductor film with a stoichiometric thickness greater than 1 mum and up to 5 mum. Also disclosed is another article including a substrate and the homogeneous superconductor film with a stoichiometric thickness greater than 1 mum and up to 5 mum. Further, methods of making these two articles are described.

Description

[0001] Cross references to related applications [0002] This application claims priority from U.S. Patent Application 12 / 751,064 filed on March 31, 2010, the content of which is incorporated herein by reference in its entirety. [0003] Government rights [0004] The present invention was completed with government funding under the project number FA9550-07-C-0034 awarded by the Air Force Scientific Research Bureau. The government has certain rights in this invention. Background technique [0005] High-temperature superconducting (HTS) materials, such as yttrium-barium-copper oxide (YBCO), have been used to make thin-film superconducting devices and wires. Thick (ie >1μm) HTS films with higher critical current (Ic) are preferred for applications requiring high current carrying capacity, such as power transmission and distribution lines, transformers, fault current limiters, magnets, motors and generators . According to the technology based on the conventional solution, a thicker...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L39/24C23C18/12
CPCC23C18/1216H01L39/2425Y10T428/265H01L39/2451C23C18/1283H10N60/0324H10N60/0548C23C18/12H10N60/01
Inventor 斯里瓦桑·萨特亚默西马丁·W·鲁皮希
Owner AMERICAN SUPERCONDUCTOR