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    Method of texturing a superconductive oxide precursor
    1.
    发明授权
    Method of texturing a superconductive oxide precursor 失效
    纹理化超导氧化物前体的方法

    公开(公告)号：US6001777A

    公开(公告)日：1999-12-14

    申请号：US902588

    申请日：1997-07-29

    申请人： Kenneth L. DeMoranville ,  Qi Li ,  Peter D. Antaya ,  Craig J. Christopherson ,  Gilbert N. Riley, Jr. ,  Jeffrey M. Seuntjens

    发明人： Kenneth L. DeMoranville ,  Qi Li ,  Peter D. Antaya ,  Craig J. Christopherson ,  Gilbert N. Riley, Jr. ,  Jeffrey M. Seuntjens

    IPC分类号： H01L39/24 ,  H01L39/00

    CPC分类号： H01L39/248

    摘要： A method of forming a textured superconductor wire includes constraining an elongated superconductor precursor between two constraining elongated members placed in contact therewith on opposite sides of the superconductor precursor, and passing the superconductor precursor with the two constraining members through flat rolls to form the textured superconductor wire. The method includes selecting desired cross-sectional shape and size constraining members to control the width of the formed superconductor wire. A textured superconductor wire formed by the method of the invention has regular-shaped, curved sides and is free of flashing. A rolling assembly for single-pass rolling of the elongated precursor superconductor includes two rolls, two constraining members, and a fixture for feeding the precursor superconductor and the constraining members between the rolls. In alternate embodiments of the invention, the rolls can have machined regions which will contact only the elongated constraining members and affect the lateral deformation and movement of those members during the rolling process.

    摘要翻译： 形成纹理超导体线的方法包括在超导体前体的相对侧上将与超导体前体相对设置的两个约束细长构件之间的细长超导体前体约束，并且使超导体前体与两个约束构件通过平辊以形成织构化的超导体线 。 该方法包括选择期望的横截面形状和尺寸约束构件以控制形成的超导体线的宽度。 通过本发明的方法形成的纹理超导体线具有规则形状的弯曲侧面并且不闪烁。 用于细长前驱体超导体的单次轧制的滚动组件包括两个辊，两个约束构件和用于在辊之间供给前体超导体和约束构件的固定装置。 在本发明的替代实施例中，辊可以具有仅与细长的约束构件接触并且在轧制过程中影响这些构件的横向变形和移动的加工区域。

    Tensioning process for manufacture of superconducting ceramic composite conductors
    4.
    发明授权
    Tensioning process for manufacture of superconducting ceramic composite conductors 失效
    用于制造超导陶瓷复合导体的张紧工艺

    公开(公告)号：US06205645B1

    公开(公告)日：2001-03-27

    申请号：US08652624

    申请日：1996-05-21

    申请人： Qi Li ,  Craig J. Christopherson ,  Gilbert N. Riley, Jr. ,  William L. Carter ,  William J. Michels ,  Eric R. Podtburg ,  Lawrence J. Masur

    发明人： Qi Li ,  Craig J. Christopherson ,  Gilbert N. Riley, Jr. ,  William L. Carter ,  William J. Michels ,  Eric R. Podtburg ,  Lawrence J. Masur

    IPC分类号： H01L3924

    CPC分类号： H01L39/248 ,  Y10T29/49014

    摘要： The combination of one or more high reduction drafts with controlled, low back tensions increases the range of deformation conditions over which dimensional tolerances and Je may be optimized. The method comprises the steps of: first, providing a precursor article comprising a metal matrix surrounding a plurality of filaments extending along the length of the article and comprising precursors to a desired superconducting ceramic; next, roll working the precursor article during a breakdown stage at a back tension less than the elastic to plastic transition threshold of the composite during at least one high reduction roll working draft, and, then, sintering the rolled article to obtain the desired superconducting ceramic. In a preferred embodiment, the rolling step further comprises rolling the article at a front tension less than the elastic to plastic transition threshold of the rolled, unsintered article.

    摘要翻译： 一个或多个高减速牵引力与受控的低回力张力的组合增加了尺寸公差和Je可能被优化的变形条件的范围。 该方法包括以下步骤：首先，提供包含金属基体的前体制品，所述金属基质围绕沿着所述制品的长度延伸的多根长丝，并且包括所需超导陶瓷的前体; 接下来，在至少一个高还原辊工作牵伸期间，以小于复合材料的弹性 - 塑性转变阈值的后拉力在击穿阶段期间辊加工前体制品，然后烧结轧制制品以获得所需的超导陶瓷 。 在优选实施例中，轧制步骤还包括以低于轧制未烧结制品的弹性 - 塑性转变阈值的前拉力滚动制品。

    Low resistance cabled conductors comprising superconducting ceramics
    5.
    发明授权
    Low resistance cabled conductors comprising superconducting ceramics 失效
    低电阻电缆导体包括超导陶瓷

    公开(公告)号：US06284979B1

    公开(公告)日：2001-09-04

    申请号：US08851719

    申请日：1997-05-05

    申请人： Alexis P. Malozemoff ,  Gregory L. Snitchler ,  William L. Barnes ,  Alexander Otto ,  Gilbert N. Riley, Jr. ,  Jeffrey M. Seuntjens

    发明人： Alexis P. Malozemoff ,  Gregory L. Snitchler ,  William L. Barnes ,  Alexander Otto ,  Gilbert N. Riley, Jr. ,  Jeffrey M. Seuntjens

    IPC分类号： H01B1210

    CPC分类号： H01L39/143

    摘要： A cabled conductor is provided for use in a cryogenically cooled circuit including refrigeration having a predetermined operating temperature and efficiency. The conductor includes multiple conductor strands cabled about the longitudinal axis of the conductor at a preselected cabling period, each strand including a composite of superconducting ceramic in intimate contact with conductive matrix material. Each filament has high performance regions in which the filament material is well-textured with its preferred direction aligned perpendicular to the widest longitudinal cross-section of the conductor alternating with poorly superconducting regions which are at least about half the diameter of a filament in length and in which the superconducting ceramic filament is strained by transposition in excess of its critical strain limit. In the poorly superconducting regions, the conductive matrix material provides an alternate current path. The ratio of the average length of the poorly superconducting regions to the preselected cabling period is less than about (&rgr;300e/&rgr;oe)&egr;E, where &rgr;oe is the resistivity of the composite at the operating temperature; &rgr;300e is the resistivity of the composite at 300 Kelvins; and &egr; is the predetermined efficiency of the refrigeration means at its operating temperature. In the preferred embodiment, this ratio is less than 1:4, and preferably less than 1:20.

    摘要翻译： 提供一种用于低温冷却回路中的电缆导体，包括具有预定工作温度和效率的制冷。 导体包括在预选布线周期围绕导体的纵向轴线布置的多个导线，每个线包括与导电基体材料紧密接触的超导陶瓷的复合材料。 每个灯丝具有高性能区域，其中长丝材料具有良好的织构，其优选的方向垂直于导体的最宽纵向横截面排列，与导体长度的至少约一半长度的不良超导区交替， 其中超导陶瓷细丝通过转移超过其临界应变极限而变形。 在较差的超导区域中，导电基体材料提供了交替的电流路径。 不良超导区域的平均长度与预选布线周期的比值小于约（rho300e / rhooe）epsiE，其中r为复合材料在工作温度下的电阻率; rho300e是300 Kelvins的复合材料的电阻率; 而epsi是制冷装置在其工作温度下的预定效率。 在优选实施方案中，该比率小于1:4，优选小于1:20。

    Method for making cabled conductors containing anisotropic superconducting compounds
    6.
    发明授权
    Method for making cabled conductors containing anisotropic superconducting compounds 失效
    制造含各向异性超导化合物的电缆导体的方法

    公开(公告)号：US06247225B1

    公开(公告)日：2001-06-19

    申请号：US08554814

    申请日：1995-11-07

    申请人： Gregory L. Snitchler ,  Jeffrey M. Seuntjens ,  William L. Barnes ,  Gilbert N. Riley, Jr.

    发明人： Gregory L. Snitchler ,  Jeffrey M. Seuntjens ,  William L. Barnes ,  Gilbert N. Riley, Jr.

    IPC分类号： H01L3924

    CPC分类号： H01L39/143 ,  H01L39/248 ,  Y10S505/884 ,  Y10S505/926 ,  Y10T29/49014

    摘要： A cabled conductor comprises a plurality of transposed strands each comprising one or more preferably twisted filaments preferably surrounded or supported by a matrix material and comprising textured anisotropic superconducting compounds which have crystallographic grain alignment that is substantially unidirectional and independent of the rotational orientation of the strands and filaments in the cabled conductor. The cabled conductor is made by forming a plurality of suitable composite strands, forming a cabled intermediate from the strands by transposing them about the longitudinal axis of the conductor at a preselected strand lay pitch, and, texturing the strands in one or more steps including at least one step involving application of a texturing process with a primary component directed orthogonal to the widest longitudinal cross-section of the cabled intermediate, at least one such orthogonal texturing step occurring subsequent to said strand transposition step. In a preferred embodiment, the filament cross-section, filament twist pitch, and strand lay pitch are cooperatively selected to provide a filament transposition area which is always at least ten times the preferred direction area of a typical grain of the desired anisotropic superconducting compound. For materials requiring biaxial texture, the texturing step preferably includes application of a texturing process with a second primary component in a predetermined direction in the plane of the widest longitudinal cross-section of the conductor.

    摘要翻译： 电缆导体包括多个转置的绞合线，每个绞合线包括一个或多个优选的绞合长丝，优选地被基质材料包围或支撑，并且包括纹理各向异性超导化合物，其具有基本上单向且不依赖于线的旋转取向的晶体取向， 电缆导体中的细丝。 电缆导体通过形成多个合适的复合线材制成，通过以预选的绞线间距将导体的纵向轴线绕它们绕导体的纵向轴线形成缆线中间体，并且以一个或多个步骤将绞合线组织包括在 至少一个步骤涉及使用与所述有线中间件的最宽纵向横截面垂直的主要部件进行纹理化处理，在所述链转置步骤之后发生的至少一个这样的正交纹理化步骤。 在优选的实施方案中，协调地选择细丝横截面，长丝扭曲节距和绞线间距，以提供总是至少是所需各向异性超导化合物的典型颗粒的优选方向面积的十倍的细丝转置区域。 对于需要双轴纹理的材料，纹理化步骤优选地包括在导体的最宽纵向截面的平面中沿预定方向施加具有第二主要部件的纹理处理。

    Cabled conductors containing anisotropic superconducting compounds
    7.
    发明授权
    Cabled conductors containing anisotropic superconducting compounds 失效
    含各向异性超导化合物的电缆导体

    公开(公告)号：US06906265B2

    公开(公告)日：2005-06-14

    申请号：US09769705

    申请日：2001-01-25

    申请人： Gregory L. Snitchler ,  Jeffrey M. Seuntjens ,  William L. Barnes ,  Gilbert N. Riley, Jr.

    发明人： Gregory L. Snitchler ,  Jeffrey M. Seuntjens ,  William L. Barnes ,  Gilbert N. Riley, Jr.

    IPC分类号： H01B12/08 ,  H01B13/00 ,  H01L39/14 ,  H01L39/24 ,  H01B12/00

    CPC分类号： H01L39/143 ,  H01L39/248 ,  Y10S505/884 ,  Y10S505/926 ,  Y10T29/49014

    摘要： A cabled conductor comprises a plurality of transposed strands each comprising one or more preferably twisted filaments preferably surrounded or supported by a matrix material and comprising textured anisotropic superconducting compounds which have crystallographic grain alignment that is substantially unidirectional and independent of the rotational orientation of the strands and filaments in the cabled conductors. The cabled conductor is made by forming a plurality of suitable composite strands, forming a cabled intermediate from the strands by transposing them about the longitudinal axis of the conductor at a preselected strand lay pitch, and, texturing the strands in one or more steps including at least one step involving application of a texturing process with a primary component directed orthogonal to the widest longitudinal cross-section of the cabled intermediate, at least one such orthogonal texturing step occurring subsequent to said strand transposition step. In a preferred embodiment, the filament cross-section, filament twist pitch, and strand lay pitch are cooperatively selected to provide a filament transposition area which is always at least ten times the preferred direction area of a typical grain of the desired anisotropic superconducting compound. For materials requiring biaxial texture, the texturing step preferably includes application of a texturing process with a second primary component in a predetermined direction in the plane of the widest longitudinal cross-section of the conductor.

    摘要翻译： 电缆导体包括多个转置的绞合线，每个绞合线包括一个或多个优选的绞合长丝，优选地被基体材料包围或支撑，并且包括纹理各向异性超导化合物，其具有基本上单向且不依赖于线的旋转取向的晶体取向， 电缆导体中的细丝。 电缆导体通过形成多个合适的复合线材制成，通过以预选的绞线间距将导体的纵向轴线绕它们绕导体的纵向轴线形成缆线中间体，并且以一个或多个步骤将绞合线组织包括在 至少一个步骤涉及使用与所述有线中间件的最宽纵向横截面垂直的主要部件进行纹理化处理，在所述链转置步骤之后发生的至少一个这样的正交纹理化步骤。 在优选的实施方案中，协调地选择细丝横截面，长丝扭曲节距和绞线间距，以提供总是至少是所需各向异性超导化合物的典型颗粒的优选方向面积的十倍的细丝转置区域。 对于需要双轴纹理的材料，纹理化步骤优选地包括在导体的最宽纵向截面的平面中沿预定方向施加具有第二主要部件的纹理处理。

    Multifilament composite BSCCO oxide superconductor
    8.
    发明授权
    Multifilament composite BSCCO oxide superconductor 失效
    多丝复合BSCCO氧化物超导体

    公开(公告)号：US06194352B1

    公开(公告)日：2001-02-27

    申请号：US08553184

    申请日：1995-11-07

    申请人： Gilbert N. Riley, Jr. ,  Jeffrey M. Seuntjens ,  William L. Barnes ,  Gregory L. Snitchler ,  Alexander Otto

    发明人： Gilbert N. Riley, Jr. ,  Jeffrey M. Seuntjens ,  William L. Barnes ,  Gregory L. Snitchler ,  Alexander Otto

    IPC分类号： H01B1202

    CPC分类号： H01L39/248 ,  H01F6/06 ,  H01F41/063 ,  H01F41/069 ,  Y10S505/74

    摘要： A method for preparing an oxide superconductor cable includes transposing a plurality of oxide superconductor strands along a longitudinal axis so as to form a cable and exposing the cable to a two step heat treatment after cabling of the oxide strands, the heat treatment comprising, (a) heating the cable to and maintaining the cable at a first temperature sufficient to partially melt the article, such that a liquid phase co-exists with the desired oxide superconductor phase; and (b) cooling the cable to and maintaining the cable at a second temperature sufficient to substantially transform the liquid phase into the desired oxide superconductor. The oxide superconductor multistrand cable includes a plurality of oxide superconductor strands, each of the strands including an oxide superconductor having an irreversible melt characteristic, wherein the plurality of oxide strands are transposed about a longitudinal axis, such that each of the strands are substantially electrically and substantially mechanically isolated; and wherein the cable exhibits critical transport properties (Jc) of at least about 10,000 A/cm2 at 77K, self field.

    摘要翻译： 制备氧化物超导体电缆的方法包括沿着纵向轴线转置多个氧化物超导体股线，以形成电缆，并且在电缆穿过氧化物线束之后将电缆暴露于两步热处理，该热处理包括：（a 将电缆加热并将电缆保持在足以部分熔化制品的第一温度，使得液相与期望的氧化物超导体相共存; 和（b）将电缆冷却到并将电缆保持在足以基本上将液相转变成所需氧化物超导体的第二温度。 氧化物超导体多股线缆包括多个氧化物超导体股线，每个股线包括具有不可逆熔融特性的氧化物超导体，其中多个氧化物股线围绕纵向轴线转置，使得每根股线基本上电气和 基本上机械隔离; 并且其中所述电缆在77K处表现出至少约10,000A / cm 2的临界传输特性（Jc）。

    Structure and method of manufacture for minimizing filament coupling losses in superconducting oxide composite articles
    10.
    发明授权
    Structure and method of manufacture for minimizing filament coupling losses in superconducting oxide composite articles 失效

    公开(公告)号：US06393690B1

    公开(公告)日：2002-05-28

    申请号：US09358167

    申请日：1999-07-20

    申请人： Gregory L. Snitchler ,  Gilbert N. Riley, Jr. ,  Alexis P. Malozemoff ,  Craig J. Christopherson

    发明人： Gregory L. Snitchler ,  Gilbert N. Riley, Jr. ,  Alexis P. Malozemoff ,  Craig J. Christopherson

    IPC分类号： H01L3924

    CPC分类号： H01L39/248 ,  H01L39/143 ,  Y10S428/93 ,  Y10S505/704 ,  Y10T29/49014 ,  Y10T428/24942 ,  Y10T428/294

    摘要： The invention provides a multifilamentary superconducting composite article comprising multiple substantially electrically decoupled domains, each including one or more fine, preferably twisted filaments of a desired superconducting oxide material. In a preferred embodiment, the article comprises a matrix, which substantially comprises a noble metal, a conductive jacketing layer surrounding the matrix, a plurality of discrete filament decoupling layers, each comprising an insulating material, disposed within the matrix to separate the matrix into a plurality of substantially electrically decoupled domains; a plurality of filaments, each comprising a desired superconducting oxide, which are disposed within and essentially encapsulated by the matrix and chemically isolated thereby from the decoupling layers, each of the electrically decoupled domains containing at least one filament. It provides multifilamentary articles that exhibit high DC performance characteristics and AC performance markedly superior to any currently available for these materials. A process and intermediate for making the article are also provided. The article may be manufactured by first, forming a composite intermediate comprising multiple domains, each including one or more fine, preferably twisted filaments of a superconducting oxide or its precursors and then thermomechanically processing the intermediate at conditions sufficient to produce at least one of the effects of texturing, crack healing and, if a precursor to the desired superconducting oxide remains, phase transformation in the filament material under conditions which support the electrical separation of the domains. Preferably, the forming step includes the step of providing filament decoupling layers comprising insulating materials or their predecessors to provide the desired domain separation and most preferably, the insulating material is formed in situ from its predecessor during the thermomechanical processing step. Oxide-forming predecessors are preferred, especially oxide forming materials selected from the group consisting of the transition metals, the alkaline earths, titanium, zirconium, niobium, molybdenum, aluminum, and their alloys. In a preferred embodiment, the desired superconducting oxide material is a member of the bismuth or yttrium families of oxide superconductors.