Iron-based superconductors (IBS) are considered as potential materials for manufacturing high-field magnets, for which developing multi-filamentary conductors with high performance and high strength is essential. Herein, 7-filamentary Cu/Ag composite sheathed Ba_0.6K_0.4Fe₂As₂ (Ba122) round wires and tapes were successfully prepared through the ex situ powder-in-tube (PIT) method and treated by hot isostatic pressing (HIP) process. Pure Ba122 phase with roughly homogeneous element distribution was obtained in the superconducting filaments. The wires and tapes show very small low-temperature normal-state resistivity of 0.12 μΩ cm and 0.17 μΩ cm respectively owing to the high electrical conductivity of copper and silver. The HIP process greatly enhances the mass density of the superconducting filaments and promotes the formation of well-grown plate-like Ba122 grains. Vickers hardness measurements on the cross sections of these filaments reveal a rather good uniformity of the mass density. The transport critical current density (J_c) in the 7-filamentary Ba122/Ag/Cu round wires and tapes reached 1.3 × 10⁴ A cm⁻² and 4.8 × 10⁴ A cm⁻² at 4.2 K in 10 T respectively. These results indicate that hot isostatic pressing is advantageous in developing high-performance multi-filamentary iron-based superconductors.

铁基超导体（IBS）被认为是制造高磁场磁体的潜在材料，为此必须开发高性能和高强度的多丝导体。这里，7-丝状铜/银复合护套的Ba _0.6 ķ _0.4的Fe ₂作为₂（Ba122）圆导线和磁带通过成功制备易地管内粉末（PIT）方法，并通过热等静压（HIP）工艺进行处理。在超导丝中获得了具有大致均匀的元素分布的纯Ba122相。由于铜和银的高电导率，导线和胶带分别显示出非常小的低温常态电阻率，分别为0.12μΩcm和0.17μΩcm。HIP工艺大大提高了超导细丝的质量密度，并促进了生长良好的板状Ba122晶粒的形成。在这些细丝的横截面上进行的维氏硬度测量表明质量密度相当均匀。7根Ba122 / Ag / Cu圆形丝和带中的传输临界电流密度（J _c）达到1.3×10 ⁴ A cm10 T中的4.2 K时分别为^-2和4.8×10 ⁴ A cm ^-2。这些结果表明热等静压在开发高性能多丝铁基超导体方面是有利的。