1. Phase Formation of Iron-Based Superconductors during Mechanical Alloying.
- Author
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Vlasenko, Vladimir A., Degtyarenko, Alena Yu., Shilov, Andrei I., Tsvetkov, Alexey Yu., Kulikova, Lyudmila F., Medvedev, Alexey S., and Pervakov, Kirill S.
- Subjects
MECHANICAL alloying ,SUPERCONDUCTORS ,HEAT treatment ,IRON-based superconductors ,POWDERS - Abstract
We successfully synthesized bulk Ba
0.6 Na0.4 Fe2 As2 and Sr0.5 Na0.5 Fe2 As2 compounds by high-energy mechanical alloying (MA) technique. The MA process results in homogeneous amorphous phases of BaFe2 As2 and SrFe2 As2 . It was found that the optimum time for high-energy milling in all cases is about 1.5–2 h, and the maximum amount of amorphous phase could be obtained when energy of 50–100 MJ/kg was absorbed by the powder. After a short-term heat treatment, we obtained nearly optimum sodium-doped Ba1−x Nax Fe2 As2 and Sr1−x Nax Fe2 As2 superconducting bulk samples. Therefore, MA is a potential scalable method to produce bulk superconducting material for industrial needs. [ABSTRACT FROM AUTHOR]- Published
- 2022
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