Fabrication of (Ba,Na)Fe2As2 round wires and tapes using HIP process

Abstract

Abstract We fabricated round wires and tapes of (Ba,Na)Fe2As2 using hot isostatic press (HIP) process, and evaluated their critical current density (Jc ). Polycrystalline powders were synthesized by two methods by mixing raw materials in a planetary ball mill or by using pre-synthesized precursors (BaAs, NaAs, Fe2As). Transport Jc of best wire reached 95 kA/cm2 under self-field and 40 kA/cm2 at 100 kOe. We also fabricated HIP tapes using the same powder and discuss their detailed characterizations. In particular, X-ray diffraction is extensively applied to the evaluation of the degree of texturing of the tape, and discuss its relationship with J c.