New IT-Processed Nb3Sn Wires With Cu Alloy Matrix
New IT-Processed Nb3Sn Wires With Cu Alloy Matrix
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新型 IT 加工铜合金基体 Nb3Sn 丝
DOI：
10.1109/tasc.2016.2629089
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发表时间：
2017
影响因子：
1.8
通讯作者：
K. Tachikawa
中科院分区：
文献类型：
--
作者：
N. Banno;Y. Miyamoto;K. Tachikawa
开发了一种以铜合金为基体的新型内锡Nb 3Sn线材。黄铜是一种有吸引力的合金作为基体，因为Zn似乎有效地促进Nb 3Sn的合成。在Nb 3Sn合成之后，Zn均匀地保持在基体中，期望改善线材的机械耐受性，这对于反应磁体和风力磁体应用可能是特别优选的。在这里，使用金黄铜（Cu-15wt%Zn）的两种新设计的线被制造：1）单堆叠型和2）多芯（MF）型。电子探针微区分析结果表明，锡的活性增强的矩阵。与Cu基体样品相比，形成了更厚的Nb 3Sn层，并且基体中的残留Sn含量变小。黄铜基体线材的Jc特性明显高于Cu基体线材。在MF型线，内Nb核心完全反应，虽然未反应的Nb部分被发现在最外面的长丝。在MF型丝材中发现基体中的残余Sn含量有更明显的降低。这种新的Nb_3Sn丝可能对未来的超导应用有用。
New internal-tin (IT) processed Nb3Sn wires using Cu-alloy matrix instead of pure Cu have been developed. Brass is an attractive alloy as the matrix, because Zn seems effective to accelerate Nb3Sn synthesis. Zn remains homogeneously in the matrix after the Nb3Sn synthesis expecting improvement of the mechanical tolerance of the wire, which may be preferable particularly for react and wind magnet applications. Here, two newly designed wires using gold brass (Cu-15wt%Zn) were fabricated: 1) single stack type and 2) multifilamentary (MF) type. Electron probe microanalysis results indicate enhancement of Sn activity in the matrix. Thicker Nb3Sn layers were formed, and residual Sn content in the matrix became smaller compared with Cu matrix samples. The Jc characteristics of the brass matrix wire is appreciably higher than that of the Cu matrix wire. In MF-type wire, inside Nb cores were fully reacted, although unreacted Nb parts were found in outermost filaments. More appreciable reduction of residual Sn content in the matrix was found in the MF-type wire. Present new Nb3Sn wire may be useful for future application of superconductivity.