High-entropy alloys (HEAs) are novel functional materials that exhibit excellent mechanical and chemical properties. Recent discovery of self-healing superconductivity of HEAs under ion irradiation suggests their great potential applications under extreme conditions such as in nuclear fusion reactors or space environments. Here, we report a fabrication of the HEA superconducting (SC) wires using the powder-in-tube (PIT) technique for the first time, a crucial stepping stone to achieve various industrial and technological applications. The TaNbHfZrTi HEA SC powder prepared by planetary ball milling was filled into Fe tubes, drawn into wires, and then sintered in evacuated quartz tubes at various temperatures. The HEA SC wire sintered at 700 °C for 1 h exhibits the highest critical current density () among the HEA SC wires sintered in the temperature range of 600 – 1000 °C. At 4.2 K, the of this wire exceeds the common benchmark value of = 100 kA cm, indicating the suitability of the HEA wire for large-scale applications, such as in high-field SC magnets. The SC transition temperature () of the HEA wire significantly increases from 5.10 K for the as-cast wire to 7.58 K with the sintering time () of 30 min at 700 °C. The scaling of the flux pinning force as a function of the magnetic field indicates that normal point pinning plays a major role in achieving a high in-field in HEA SC wires. These results underscore the significant potential of HEA superconductors for practical applications in high-field SC magnets, SC electric machines, and next-generation nuclear fusion reactors.

中文翻译：

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管内粉法制备高熵合金超导线材


高熵合金（HEA）是一种新型功能材料，具有优异的机械和化学性能。最近在离子辐照下发现的 HEA 自愈超导性表明它们在核聚变反应堆或太空环境等极端条件下具有巨大的应用潜力。在这里，我们首次报道了使用管内粉末（PIT）技术制造 HEA 超导（SC）线，这是实现各种工业和技术应用的关键垫脚石。将行星球磨制备的TaNbHfZrTi HEA SC粉末填充到Fe管中，拉成丝，然后在真空石英管中在不同温度下烧结。在 700 °C 下烧结 1 小时的 HEA SC 线材在 600 – 1000 °C 温度范围内烧结的 HEA SC 线材中表现出最高的临界电流密度 ()。在 4.2K 时，该导线的 超过了 = 100kAcm 的常见基准值，表明 HEA 导线适合大规模应用，例如高场 SC 磁体。当 700 °C 下的烧结时间 () 为 30 分钟时，HEA 线材的 SC 转变温度 () 从铸态线材的 5.10K 显着提高到 7.58K。磁通钉扎力随磁场的变化表明法向点钉扎在实现 HEA SC 导线的高场内方面发挥着重要作用。这些结果强调了 HEA 超导体在高场 SC 磁体、SC 电机和下一代核聚变反应堆实际应用中的巨大潜力。