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1. 发明申请

WO1996041382A2 NIOBIUM 47 WEIGHT % TITANIUM BY IRON ADDITION AND METHOD FOR MAKING SUPERCONDUCTING MULTIFILAMENTARY WIRE 审中-公开
标题翻译：铌47重量百分比钛铁添加和制造超导多芯线的方法
公开(公告)号：WO1996041382A2
公开(公告)日：1996-12-19
申请号：PCT/US1996008580
申请日：1996-06-05
申请人： TELEDYNE INDUSTRIES, INC.
发明人： TELEDYNE INDUSTRIES, INC. , SMATHERS, David, B.
IPC分类号： H01L39/24
CPC分类号： H01L39/2406
摘要： Nb 47 wt.% Ti compositions having an increased iron content of from greater than 200 to about 2000 ppm have improved superconducting properties. Preferred levels for high energy physics applications are about 46 to 48 wt.% titanium, about 500 to 700 ppm iron and about 400 to 700 ppm oxygen and preferred levels for energy storage and MRI applications are about 52 to 55 wt.% titanium, about 500 to about 1000 ppm iron, and about 350 to 500 ppm oxygen. These compositions develop a fine, distributed ribbon shaped precipitate morphology when made into wires which increases the upper critical field. This permits the flow of high critical current density in the 5 to 10 Tesla range at 4.2 Kelvin. Multifilamentary wires made of these compositions form superconducting products having about the same critical current properties at 5 Tesla as products made with less than 200 ppm iron. However, they have improved upper critical field strength and an improved critical current value at all fields above 5 Tesla as compared to the lower iron containing compositions. Preferable compositions have an upper critical field strength which is at least 0.25 Tesla greater than that of the lower iron containing compositions.
摘要翻译：具有大于200至约2000ppm的铁含量增加的Nb 47重量％Ti组合物具有改善的超导性能。高能物理应用的优选水平为约46至48重量％的钛，约500至700ppm的铁和约400至700ppm的氧，并且用于储能和MRI应用的优选水平为约52至55重量％的钛，约为 500至约1000ppm的铁和约350至500ppm的氧。当这些组合物制成导线时，这些组合物形成细的分布的带状沉淀形态，这增加了上临界场。这允许以4.2开尔德的5至10特斯拉范围内的高临界电流密度的流动。由这些组合物制成的多条丝线形成超导产品，其具有与以小于200ppm的铁制成的产品在5特斯拉具有大致相同的临界电流特性。然而，与含铁含量较低的组合物相比，它们在5特斯拉以外的所有领域都提高了上临界场强度和改进的临界电流值。优选的组合物具有比含铁组合物低的至少0.25特斯拉的上临界场强。

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