Fabrication and Superconducting Properties of the Bronze Processed Nb3Sn Multifilamentary Wire Using Cu-Sn-Zn Alloy Matrix
Fabrication and Superconducting Properties of the Bronze Processed Nb3Sn Multifilamentary Wire Using Cu-Sn-Zn Alloy Matrix
复制标题
Cu-Sn-Zn合金基体青铜加工Nb3Sn复丝线的制备及其超导性能
DOI：
10.1109/tasc.2014.2387053
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发表时间：
2015
影响因子：
1.8
通讯作者：
Y. Hishinuma
中科院分区：
文献类型：
--
作者：
Y. Hishinuma;A. Kikuchi;Y. Shimada;T. Kashiwai;S. Hata;S. Yamada;T. Muroga and A. Sagara;武智 学;Y. Hishinuma
我们开发了几种新的铜-锡-锌-(钛)合金，即所谓的“CSZ合金”，用于实际的青铜加工Nb3Sn线。采用Mizuta法制备了几种CSZ合金。合金中的锌均匀地溶解在α相中，没有发现锌钛化合物。用不同名义成分的CSZ为母材，制备了19种不同Nb长丝的CSZ Nb_3Sn前驱丝。我们还发现CSZ/Nb复合材料在室温下表现出了良好的加工性能。本文研究了具有不同CSZ基团的Nb3Sn线的显微组织和超导性能随热处理条件的变化。我们清楚地观察到，在Nb_3Sn形成后，基质中的锌含量保持不变。添加锌可形成较厚的Nb3Sn层。获得了约18K的T_c跃迁。最后，我们通过重新堆积的方法，成功地利用CSZ基片制备了多丝导线。Nb丝数量为7771根，直径为3.4μm。文中还报道了添加锌对线材组织和超导性能的影响。
We developed several new Cu-Sn-Zn-(Ti) alloys, which are so-called “CSZ alloy,” for practical bronze-processed Nb3Sn wires. Several CSZ alloys were fabricated via the Mizuta method. The Zn was uniformly dissolved in the α phase of the Cu-Sn alloy, and the Zn-Ti compounds were not found in the CSZ alloy. Various 19 Nb-filament CSZ Nb3Sn precursor wires were fabricated using CSZ matrices with different Sn and Zn nominal compositions. We also found that the CSZ/Nb composites showed excellent workability at room temperature. In this paper, changes in microstructure and superconducting properties of Nb3Sn wires with different CSZ matrices as a function of the heat treatment condition were investigated. We clearly observed that the amount of Zn in the matrix remained constant after the Nb3Sn formation. Thicker Nb3Sn layers were formed by the Zn addition. Tctransitions of about 18 K have been obtained. Finally, we have succeeded in fabricating multifilamentary wires using CSZ matrices through the restacking method. The number of Nb filaments is 7771 with a diameter of 3.4 μm. The effect of the Zn addition on microstructures and superconducting property of the CSZ wires are also reported.