Suppression of the sausaging effect in (Ba,Na)Fe2As2 round wires by using Ag1−zSnz/Cu double sheath

IF 1.3 3区物理与天体物理 Q4 PHYSICS, APPLIED Physica C-superconductivity and Its Applications Pub Date : 2024-08-22 DOI:10.1016/j.physc.2024.1354555

Ryosuke Sakagami , Takeru Sasaki , Takamasa Ito , Tsuyoshi Tamegai , Hideki Kajitani , Satoshi Awaji

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Abstract

We report the fabrication of (Ba,Na)Fe₂As₂ round wires that are processed using the hot isostatic pressing (HIP) technique. We employed double sheaths composed of Cu and Ag₁₋_zSn_z alloy because they offer superior mechanical strength compared to pure Ag. The cross-sectional area of the wire core was measured using X-ray computed tomography. The findings of this study demonstrate that utilizing Ag₁₋_zSn_z alloy as the inner sheath material helps reduce the degree of the sausaging effect in the wire, resulting in a more uniform cross-sectional area of the wire core. However, transport critical current density (J_c) of the wires with the Ag₁₋_zSn_z alloy decreased gradually as the Sn content, z, increased, which may be attributed to the nonoptimized sintering temperatures during the HIP process. These results suggest that when heat-treated at an appropriate temperature during the HIP process, the use of Ag₁₋_zSn_z alloy holds great potential for use in high-performance applications.

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使用 Ag1-zSnz/Cu 双层护套抑制 (Ba,Na)Fe2As2 圆导线中的滑动效应

我们报告了使用热等静压 (HIP) 技术制造 (Ba,Na)Fe2As2 圆丝的情况。我们采用了由铜和 Ag1-zSnz 合金组成的双层护套，因为与纯银相比，它们具有更高的机械强度。线芯的横截面积是通过 X 射线计算机断层扫描测量的。研究结果表明，使用 Ag1-zSnz 合金作为内护套材料有助于降低导线的滑动效应程度，从而使线芯的横截面积更加均匀。然而，使用 Ag1-zSnz 合金的金属丝的传输临界电流密度（Jc）随着 Sn 含量 z 的增加而逐渐降低，这可能是由于 HIP 过程中烧结温度未优化造成的。这些结果表明，如果在 HIP 过程中以适当的温度进行热处理，Ag1-zSnz 合金在高性能应用中的应用潜力巨大。

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来源期刊

Physica C-superconductivity and Its Applications 物理-物理：应用

CiteScore

2.70

自引率

11.80%

发文量

102

审稿时长

66 days

期刊介绍： Physica C (Superconductivity and its Applications) publishes peer-reviewed papers on novel developments in the field of superconductivity. Topics include discovery of new superconducting materials and elucidation of their mechanisms, physics of vortex matter, enhancement of critical properties of superconductors, identification of novel properties and processing methods that improve their performance and promote new routes to applications of superconductivity. The main goal of the journal is to publish: 1. Papers that substantially increase the understanding of the fundamental aspects and mechanisms of superconductivity and vortex matter through theoretical and experimental methods. 2. Papers that report on novel physical properties and processing of materials that substantially enhance their critical performance. 3. Papers that promote new or improved routes to applications of superconductivity and/or superconducting materials, and proof-of-concept novel proto-type superconducting devices. The editors of the journal will select papers that are well written and based on thorough research that provide truly novel insights.