Phase Formation of Iron-Based Superconductors during Mechanical Alloying

We successfully synthesized bulk Ba(0.6)Na(0.4)Fe(2)As(2) and Sr(0.5)Na(0.5)Fe(2)As(2) compounds by high-energy mechanical alloying (MA) technique. The MA process results in homogeneous amorphous phases of BaFe(2)As(2) and SrFe(2)As(2). It was found that the optimum time for high-energy milling in a...

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Detalles Bibliográficos
Autores principales: Vlasenko, Vladimir A., Degtyarenko, Alena Yu., Shilov, Andrei I., Tsvetkov, Alexey Yu., Kulikova, Lyudmila F., Medvedev, Alexey S., Pervakov, Kirill S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9737871/
https://www.ncbi.nlm.nih.gov/pubmed/36499936
http://dx.doi.org/10.3390/ma15238438
Descripción
Sumario:We successfully synthesized bulk Ba(0.6)Na(0.4)Fe(2)As(2) and Sr(0.5)Na(0.5)Fe(2)As(2) compounds by high-energy mechanical alloying (MA) technique. The MA process results in homogeneous amorphous phases of BaFe(2)As(2) and SrFe(2)As(2). 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 Ba(1−x)Na(x)Fe(2)As(2) and Sr(1−x)Na(x)Fe(2)As(2) superconducting bulk samples. Therefore, MA is a potential scalable method to produce bulk superconducting material for industrial needs.

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