Fabrication and superconducting properties of PIT-V3Ga mono-cored wires using high Ga content Cu–Ga compound powders
Fabrication and superconducting properties of PIT-V3Ga mono-cored wires using high Ga content Cu–Ga compound powders
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高Ga含量Cu-Ga复合粉末PIT-V3Ga单芯线的制备及其超导性能
DOI：
10.1088/0953-2048/20/6/014
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
A. Nishimura
中科院分区：
文献类型：
--
作者：
Y. Hishinuma;A. Kikuchi;Y. Iijima;Y. Yoshida;T. Takeuchi;A. Nishimura
钒基超导材料的感生放射性衰减时间短，力学性能优于铌基材料。我们认为，V_3Ga化合物是最有前途的“低激活高场超导体”材料之一。然而，V3 Ga化合物线的当前临界电流密度（Jc）性质不足以应用于聚变磁体应用。为了改善V3 Ga合金丝的加工性能和Jc性能，研究了一种采用高Ga含量Cu-Ga化合物的新型PIT工艺。结果表明，在Cu-Ga化合物粉末细丝与V基体的界面处沿着形成了较厚的反应层。临界转变温度（Tc）的值被证明是几乎15 K，这是高于传统的青铜处理的样品。本文研究了不同Ga含量的Cu-Ga化合物的输运特性和微观结构。
V-based superconducting material has a shorter decay time of induced radioactivity and its mechanical properties are better than Nb-based materials. We thought that the V3Ga compound was one of the most promising materials in ‘low activation and higher field superconductors’ for an advanced fusion reactor. However, the present critical current density (Jc) property of the V3Ga compound wire is insufficient to apply to fusion magnet applications. We investigated a new route powder-in-tube (PIT) process using a high Ga content Cu–Ga compound in order to improve workability and the Jc property of the V3Ga compound wire. It was confirmed that a thicker reaction layer formed along the boundary of the Cu–Ga compound powder filament and V matrix. Critical transition temperature (Tc) values were shown to be almost 15 K, which was higher than conventional bronze processed samples. Comparisons of the transport Jc property and microstructure between different Ga content Cu–Ga compounds are investigated in this paper.