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Characterization of phases formed in the iron carbide process by X-ray diffraction, mossbauer, X-ray photoelectron spectroscopy, and raman spectroscopy analyses

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Abstract

Iron carbide was prepared by iron ore reduction and iron cementation using Ar-H2-CH4 gas mixture with and without sulfur. Phases formed in the reduction/cementation process were examined by X-ray diffraction (XRD), Mossbauer, and Raman spectroscopy. The sample surface was also analyzed by X-ray photoelectron spectroscopy (XPS). XRD and Mossbauer analyses showed that iron oxide was first reduced to metallic iron, and then, metallic iron was carburized to cementite. Addition of a small amount of H2S to the reaction gas retarded the cementite formation but made the cementite more stable. XPS analysis showed that the surface of samples converted to iron carbide using sulfurcontaining gas consisted of mainly Fe3C and a small amount of graphitic carbon. Raman spectra of a sample produced in the iron carbide process showed the G and D bands, which are characteristic for carbon-carbon bonds. The intensity ratio of G/D bands depended on the sulfur content in the reducing/carburizing gas.

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Authors and Affiliations

  1. the School of Materials Science and Engineering, University of New South Wales, 2052, Sydney, Australia

    Eungyeul Park (Postgraduate Student) & Oleg Ostrovski (Professor)

  2. the Max-Planck-Institute für Eisenforschung GmbH, D-40074, Dusseldorf, Germany

    Jianqiang Zhang (Postdoctoral Research Fellow)

  3. the Max-Planck-Institute für Kohlenforschung, D-45470, Mulheim, Germany

    Stuart Thomson (Postdoctoral Research Fellow)

  4. the Chemistry Department, University of Aberdeen, AB24 3UE, Aberdeen, Scotland

    Russell Howe (Professor)

Authors
  1. Eungyeul Park
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  2. Oleg Ostrovski
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  3. Jianqiang Zhang
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  4. Stuart Thomson
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  5. Russell Howe
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Park, E., Ostrovski, O., Zhang, J. et al. Characterization of phases formed in the iron carbide process by X-ray diffraction, mossbauer, X-ray photoelectron spectroscopy, and raman spectroscopy analyses. Metall Mater Trans B 32, 839–845 (2001). https://doi.org/10.1007/s11663-001-0071-1

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  • DOI: https://doi.org/10.1007/s11663-001-0071-1

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