Mössbauer spectroscopy study of mechanically alloyed Fe 2O3-(Al, Co and WC) systems

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Mössbauer spectroscopy revealed that a central hyperfine interaction doublet and an additional sextet characterized the appearance of new phases in the mechanically alloyed Fe2O3-Al and Fe2O 3-Co systems. In the Fe2O3-Al system, the intensity of the central super paramagnetic doublet which represents small particles of iron, increased with increasing milling time from 5 to 30 h of mechanical alloying. The magnetic sextet characterizing hematite vanished in the room temperature Mössbauer spectra of samples produced after 25 h of mechanically alloying the 50% Fe2O3 and 50% Al system. In general XRD peak broadening was observed as a result of extensive material structural distortion and formation of small particles. Fe, Al2O 3 and mixed iron-aluminium oxide phases were identified in the XRD patterns with a small persistence of the iron oxide up to 20 h of mechanically alloying the 1:1 system Al-Fe2O3. In the 50% Co-50% Fe2O3 system, a 55% abundant new phase CoFe 2O4 was observed, from the Mössbauer spectra of the system. The presence of this new phase was confirmed by the XRD analysis. The high energy ball milling of WC-Fe2O3 revealed a more effective grinding compared to hematite alone. The hematite particles were reduced to nanosized particles.

Original languageEnglish
Pages (from-to)1017-1022
Number of pages6
JournalHyperfine Interactions
Issue number1-3
Publication statusPublished - Feb 2006


  • Aluminum
  • Cobalt
  • Hematite ore
  • Mechanical alloying
  • Mössbauer spectroscopy
  • WC

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry


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