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Effect of the milling conditions on the formation of nanostructured Fe–Co powders
Author(s) -
Alleg Safia,
Bentayeb Fatima Zohra,
Bensalem Rachid,
Djebbari Chafia,
Bessais Lotfi,
Greneche Jean Marc
Publication year - 2008
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200824040
Subject(s) - ball mill , nanocrystalline material , crystallite , hyperfine structure , materials science , diffraction , grain size , metallurgy , mössbauer spectroscopy , grain boundary , magnetization , analytical chemistry (journal) , chemical engineering , crystallography , magnetic field , microstructure , nanotechnology , chemistry , physics , engineering , chromatography , quantum mechanics , optics
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)