NB3AL SUPERCONDUCTORS FOR ABOVE 850 MHZ NMR MAGNETS

在高于约10的磁场下工作的超导磁体 特斯拉主要依靠使用A15型超导体。在这些人中 A15超导体只有Nb3Sn基和Nb3Al基化合物是 被认为对实际应用有用。Nb3A1的属性为 优于Nb3Sn，但没有美国制造商生产Nb3Al。这部作品 将展示一种制备高性能Nb3Al的实用方法 超导体。1500K以上的高温热处理将 用于反应小直径多芯Nb-Al复合丝 它可以在Nb3A1相形成后进行电缆连接。该产品 将是一种高性能灵活的Nb3A1电缆，更适合 可靠的反应-然后-风的磁铁制造方法。阶段性工作 将： 1)通过制造原型来确定合成的可靠性 高JC Nb3A1线材。 2)制作了一种适用于反作用的Nb3A1柔性电缆样机。 然后顺风进场。 3)评估超导性能和材料性能，以及尺度- 提升潜力。 高性能、高性价比Nb3Al超导体的生产 可以为美国制造高密度脂蛋白提供领先优势 由外国公司主导的油田核磁共振磁体。 建议的商业应用： 高性能、高性价比Nb、Al超导体的生产 可在制造高场核磁共振磁体方面领先于美国 这就是由外国公司主导的行业。

Superconducting magnets for operation at fields higher than about 10 tesla rely principally on the use of type A15 superconductors. Among the A15 superconductors only the Nb3Sn and Nb3A1 based compounds are considered useful for practical applications. Properties of Nb3A1 are superior to Nb3Sn, but there is no US manufacturer of Nb3Al. This work will demonstrate a practical method to fabricate high performance Nb3Al superconductors. High temperature heat treatments, above 1500 K, will be used to react small diameter multifilamentary Nb-A1 composite wires which can be cabled after the formation of the Nb3A1 phase. The product will be a high performance flexible Nb3A1 cable that suits the more reliable react-then-wind approach to magnet fabrication. The phase work will: 1) Establish the reliability of the synthesis by fabricating a prototype high Jc Nb3A1 wire. 2) Fabricate a prototype flexible Nb3A1 cable suitable for the react- then-wind approach. 3) Evaluate the superconducting and material properties, and the scale- up potential. Production of high performance and cost effective Nb3A1 superconductors can provide a leading edge to the US industry for fabrication of high field NMR magnets that is dominated by foreign companies. PROPOSED COMMERCIAL APPLICATION: Production of high performance and cost effective Nb,Al superconductors can provide a leading edge to USA in fabricating high field NMR magnets that is industry dominated by foreign companies.