Effect of the milling conditions on the formation of nanostructured Fe-Co powders

✍ Scribed by Alleg, Safia ;Bentayeb, Fatima Zohra ;Bensalem, Rachid ;Djebbari, Chafia ;Bessais, Lotfi ;Greneche, Jean Marc

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 373 KB
• Volume: 205
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200824040

✦ Synopsis

Abstract

Nanostructured Fe–12Co (wt%) powders were prepared by mechanical alloying in a planetary ball mill. The milling process was carried out at different milling conditions. The obtained powders were characterized by X‐ray diffraction, ^57^Fe Mössbauer spectrometry and magnetic measurements. The low and high speed ball‐milling conditions lead to the formation of a single and two‐bcc Fe(Co) structure, respectively, having different crystallite sizes, microstrains hyperfine parameters and magnetic properties. The average hyperfine magnetic field values: 〈B〉~1~ = 34.8 T and 〈B〉~2~ = 28.2 T of the two‐bcc Fe(Co) structure could be attributed to the nanocrystalline grains and to the grain boundaries, respectively. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)