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Microstructure characterization and thermal stability of the ball milled iron powders

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Abstract

X-ray diffraction and thermal measurements were used to investigate the microstructural, structural, and thermal properties of nanocrystalline Fe prepared by ball milling process. The crystallite size refinement down to the nanometer scale is accompanied by the increase of the internal level strains and the dislocations density. The lattice distortion is evidenced by the increase of both the lattice parameter and the static Debye–Waller parameter. The grain boundary enthalpy decreases above 12 h of milling. The nanostructured paramagnetic bcc α-Fe domain is extended by about 75 K at the expense of both the magnetic bcc α-Fe and nonmagnetic fcc γ-Fe domains as compared to coarse-grained pure α-Fe.

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Authors and Affiliations

  1. Department of Technology, Faculty of Technology, University 20 Août 1955 of Skikda, B. P. 26, Route d’El-Hadaiek, 21000, Skikda, Algeria

    Sonia Azzaza

  2. Laboratory of Magnetism and Spectroscopy of Solids, Department of Physics, Faculty of Science, University Badji Mokhtar of Annaba, B. P. 12, 23000, Annaba, Algeria

    Sonia Azzaza & Safia Alleg

  3. GRMT, Departamento de Física, Universitat de Girona, Santaló s/n, 17071, Girona, Spain

    Joan-Josep Suňol

Authors
  1. Sonia Azzaza
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  2. Safia Alleg
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  3. Joan-Josep Suňol
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Correspondence to Sonia Azzaza.

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Azzaza, S., Alleg, S. & Suňol, JJ. Microstructure characterization and thermal stability of the ball milled iron powders. J Therm Anal Calorim 119, 1037–1046 (2015). https://doi.org/10.1007/s10973-014-4281-6

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  • DOI: https://doi.org/10.1007/s10973-014-4281-6

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