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<p>We report the effect of milling time (0–48&#xa0;h) on the structural, magnetic and hyperfine properties of Fe<sub>60</sub>Al<sub>40</sub> alloy prepared by mechanical alloying. XRD measurements show that the disordered bcc α-Fe(Al) solid solution forms completely after 36&#xa0;h of milling. With increasing milling time, the mean crystallite size decreases, the microstrain increases, and the lattice parameter expands. SEM micrographs reveal a transition from larger to smaller particles. The <sup>57</sup>Fe Mössbauer spectrum of the unmilled powder is fitted by a sextet, whereas the milled samples exhibit both sextet and singlet components, consistent with progressive alloying and complete solid-solution formation after 36&#xa0;h. The average hyperfine magnetic field decreases with increasing milling time, and the hyperfine field distributions indicate several local Fe environments. Room-temperature hysteresis loops were used to determine the saturation magnetization and coercive field.</p>

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Structural, Mössbauer and magnetic properties of Fe60Al40 nanostructured powders synthesized by high-energy mechanical alloying

  • 期刊论文

  • 发表日期：

    2026年5月19日

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  • M. Hemmous,
  • A. Guittoum,
  • T. Kacel

摘要

We report the effect of milling time (0–48 h) on the structural, magnetic and hyperfine properties of Fe60Al40 alloy prepared by mechanical alloying. XRD measurements show that the disordered bcc α-Fe(Al) solid solution forms completely after 36 h of milling. With increasing milling time, the mean crystallite size decreases, the microstrain increases, and the lattice parameter expands. SEM micrographs reveal a transition from larger to smaller particles. The 57Fe Mössbauer spectrum of the unmilled powder is fitted by a sextet, whereas the milled samples exhibit both sextet and singlet components, consistent with progressive alloying and complete solid-solution formation after 36 h. The average hyperfine magnetic field decreases with increasing milling time, and the hyperfine field distributions indicate several local Fe environments. Room-temperature hysteresis loops were used to determine the saturation magnetization and coercive field.