公开(公告)号：EP0780024B1

公开(公告)日：2002-02-27

申请号：EP95933044.0

申请日：1995-09-08

申请人： AMERICAN SUPERCONDUCTOR CORPORATION

发明人： CHRISTOPHERSON, Craig, John ,  RILEY, Gilbert, N., Jr. ,  SCUDIERE, John

IPC分类号： H01L39/24

CPC分类号： H01L39/248 ,  Y10T29/49014

摘要： A method of texturing a multifilamentary article having filaments comprising a desired oxide superconductor or its precursors by torsionally deforming the article is provided. The texturing is induced by applying a torsional strain which is at least about 0.3 and preferably at least about 0.6 at the surface of the article, but less than the strain which would cause failure of the composite. High performance multifilamentary superconducting composite articles having a plurality of low aspect ratio, twisted filaments with substantially uniform twist pitches in the range of about 1.00 inch to 0.01 inch (25 to 0.25 mm), each comprising a textured desired superconducting oxide material, may be obtained using this texturing method. If tighter twist pitches are desired, the article may be heat treated or annealed and the strain repeated as many times as necessary to obtain the desired twist pitch. It is preferred that the total strain applied per step should be sufficient to provide a twist pitch tighter than 5 times the diameter of the article, and twist pitches in the range of 1 to 5 times the diameter of the article are most preferred. The process may be used to make a high performance multifilamentary superconducting article, having a plurality of twisted filaments, wherein the degree of texturing varies substantially in proportion to the radial distance from the center of the article cross section, and is substantially radially homogeneous at any given cross section of the article. Round wires and other low aspect ratio multifilamentary articles are preferred forms. The invention is not dependent on the melting characteristics of the desired superconducting oxide. Desired oxide superconductors or precursors with micaceous or semi-micaceous structures are preferred. When used in connection with desired superconducting oxides which melt irreversibly, it provides multifilamentary articles that exhibit high DC performance characteristics and AC performance markedly superior to any currently available for these materials. In a preferred embodiment, the desired superconducting oxide material is BSCCO 2223.

摘要翻译： 提供了一种通过使制品扭转变形来制造具有包含所需氧化物超导体或其前体的长丝的复丝制品的方法。 通过在制品表面施加至少约0.3，优选至少约0.6的扭转应变，但小于可能导致复合材料失效的应变，诱发纹理化。 可以获得具有多个具有基本上均匀的扭曲节距的大约1.00英寸至0.01英寸（25至0.25mm）的低纵横比绞合长丝的高性能复丝超导复合制品，每个复合制品均包含纹理化期望的超导氧化物材料 使用这种纹理方法。 如果需要更紧的扭转节距，则可以对制品进行热处理或退火，并且根据需要重复该应变多次以获得所需的扭转节距。 优选的是，每个步骤施加的总应变应该足以提供比制品直径的5倍更紧的扭曲节距，并且最优选制品直径的1至5倍范围内的扭曲节距。 该方法可以用于制造具有多根加捻细丝的高性能复丝超导制品，其中加工程度基本上与距制品横截面中心的径向距离成比例地变化，并且在任何 给出文章的横截面。 圆线和其他低纵横比复丝制品是优选的形式。 本发明不依赖于期望的超导氧化物的熔化特性。 期望的具有云母或半云母结构的氧化物超导体或前体是优选的。 当与所需的不可逆熔化的超导氧化物结合使用时，它提供了具有高DC特性和AC性能的多丝制品，其性能明显优于目前可用于这些材料的任何超导氧化物。 在一个优选实施例中，所需的超导氧化物材料是BSCCO 2223。

公开(公告)号：EP0780024A1

公开(公告)日：1997-06-25

申请号：EP95933044.0

申请日：1995-09-08

申请人： AMERICAN SUPERCONDUCTOR CORPORATION

发明人： CHRISTOPHERSON, Craig, John ,  RILEY, Gilbert, N., Jr. ,  SCUDIERE, John

IPC分类号： C01G1 ,  C01G29 ,  H01B12 ,  H01B13 ,  H01L39

CPC分类号： H01L39/248 ,  Y10T29/49014

摘要： A method of texturing a multifilamentary article having filaments comprising a desired oxide superconductor or its precursors by torsionally deforming the article is provided. The texturing is induced by applying a torsional strain which is at least about 0.3 and preferably at least about 0.6 at the surface of the article, but less than the strain which would cause failure of the composite. High performance multifilamentary superconducting composite articles having a plurality of low aspect ratio, twisted filaments with substantially uniform twist pitches in the range of about 1.00 inch to 0.01 inch (25 to 0.25 mm), each comprising a textured desired superconducting oxide material, may be obtained using this texturing method. If tighter twist pitches are desired, the article may be heat treated or annealed and the strain repeated as many times as necessary to obtain the desired twist pitch. It is preferred that the total strain applied per step should be sufficient to provide a twist pitch tighter than 5 times the diameter of the article, and twist pitches in the range of 1 to 5 times the diameter of the article are most preferred. The process may be used to make a high performance multifilamentary superconducting article, having a plurality of twisted filaments, wherein the degree of texturing varies substantially in proportion to the radial distance from the center of the article cross section, and is substantially radially homogeneous at any given cross section of the article. Round wires and other low aspect ratio multifilamentary articles are preferred forms. The invention is not dependent on the melting characteristics of the desired superconducting oxide. Desired oxide superconductors or precursors with micaceous or semi-micaceous structures are preferred. When used in connection with desired superconducting oxides which melt irreversibly, it provides multifilamentary articles that exhibit high DC performance characteristics and AC performance markedly superior to any currently available for these materials. In a preferred embodiment, the desired superconducting oxide material is BSCCO 2223.