公开(公告)号：US07505800B2

公开(公告)日：2009-03-17

申请号：US11279282

申请日：2006-04-11

申请人： René Flükiger ,  Vital Abächerli ,  Davide Uglietti ,  Daniel Eckert

发明人： René Flükiger ,  Vital Abächerli ,  Davide Uglietti ,  Daniel Eckert

IPC分类号： H01B12/06

CPC分类号： H01L39/14 ,  H01L39/2409 ,  Y10S505/806 ,  Y10S505/821 ,  Y10S505/917 ,  Y10S505/919 ,  Y10S505/92 ,  Y10T29/49014

摘要： A superconductive element containing Nb3Sn, in particular a multifilament wire, comprising at least one superconductive filament (8) which is obtained by a solid state diffusion reaction from a preliminary filament structure (1), said preliminary filament structure (1) containing an elongated hollow pipe (2) having an inner surface (3) and an outer surface (4), wherein said hollow pipe (2) consists of Nb or an Nb alloy, in particular NbTa, wherein the outer surface (4) is in close contact with a surrounding bronze matrix (5) containing Cu and Sn, and wherein the inner surface (3) is in close contact with an inner bronze matrix (5) also containing Cu and Sn, is characterized in that the inner bronze matrix (5) of the preliminary filament structure (1) encloses in its central region an elongated core (6) consisting of a metallic material, said metallic material having at room temperature (=RT) a thermal expansion coefficient αcore 300 MPa, said metallic material having at RT an elongation at rupture A>20%, and wherein the metallic material of the core (6) is chemically inert with respect to the material of the inner bronze matrix (5) up to a reaction temperature T of the solid state diffusion reaction. This element has improved superconductive properties in a large volume fraction of its superconductive filaments, in particular a high critical temperature Tc and a high critical magnetic filed strength Bc2, and is mechanically stable enough for commercial applications such as magnet coils.

摘要翻译： 包含Nb 3 Sn的超导元件，特别是复丝线，其包含至少一个通过来自预备丝状结构（1）的固态扩散反应获得的超导细丝（8），所述预丝细丝结构（1）包含细长的中空 具有内表面（3）和外表面（4）的管（2），其中所述中空管（2）由Nb或Nb合金特别是NbTa组成，其中外表面（4）与 包含Cu和Sn的周围青铜基体（5），并且其中所述内表面（3）与还含有Cu和Sn的内部青铜基体（5）紧密接触，其特征在于，所述内部青铜基体（5） 预备细丝结构（1）在其中心区域包围由金属材料组成的细长芯（6），所述金属材料在室温（= RT）下具有热膨胀系数α1<17 * 10-6K-1，优选 我说，alphacore <= 8 * 10-6 K-1 所述金属材料在室温下具有屈服强度R p 0.2> 300MPa，所述金属材料在RT处具有断裂伸长率> 20％，并且其中所述芯体（6）的金属材料相对于 内部青铜基质（5）直至固态扩散反应的反应温度T. 该元件在其超导细丝的大体积分数，特别是高临界温度Tc和高临界磁场强度Bc2中具有改进的超导性能，并且对于商业应用如磁体线圈具有机械稳定性。