Fabrication and Superconductivity of Ba0.6K0.4Fe2As2/Ag Wires and Tapes Using Mechanical Alloyed Precursor

Conventional methods of Ba0.6K0.4Fe2As2 precursor preparation are complicated and expensive. In this paper, we describe the mechanical alloying of precursor by high-energy ball milling and its processing to wires and tapes. Our approach is to high-energy ball-mill a starting mixture of Ba and K pieces with Fe and As powders. The resultant powders are packed into an Ag sheath and reduced by groove rolling or flat rolling. Critical current density measurements were performed on un-sintered wire and tape, and compared to the results of measurements on wire and tape sintered at 750 oC for 12 h. We achieved 6.98×104 A/cm2 at 4.2 K and self-field in the sintered tape. Our results indicate that the mechanical alloyed precursor and the resulting Ag-sheathed Ba0.6K0.4Fe2As2 wires and tapes are promising but require further development.

Keywords

iron-based superconductor, bal milling

Citation

Published version: IEEE Transactions on Applied Superconductivity (Volume: 27, Issue: 4, June 2017) Article Sequence Number: 7300105. https://doi.org/10.1109/TASC.2016.2626343

URI

http://hdl.handle.net/1811/88136

Collections

Research and Scholarship (CSMM)

Full item page

Knowledge Bank