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Characterization of the Laves Phases Zr(Cr,Fe)2 Oxidized in an Open Furnace Using Mössbauer Spectroscopy

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Abstract

Three Laves phases Zr(Cr0.40Fe0.60)2, Zr(Cr0.95Fe0.05)2 and Zr(Cr0.15Fe0.85)2 were characterized when oxidized 7 min using Analytical Electron Microscopy (AEM), X-ray diffraction (XRD) and Mössbauer spectroscopy (MS) techniques. The first sample occurs as a hexagonal structure (C14) the other two as cubic (C15) structures. Oxidation modified them but their corresponding Laves phases still, remained. Besides, Zr2−x O x , Cr oxides, α-Cr, (Fe, Cr) oxides, α-Fe and α-Fe2O3 were formed in the Fe-rich samples at variance of the Cr-rich one, in which α-Fe and α-Fe2O3 were absent. The appearance of α-Fe supported the model previously suggested for the oxidation of the Laves phases. Results also suggested that future oxidation times have to be chosen accordingly to the composition of the Laves phases to follow stages of their oxidation.

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Authors and Affiliations

  1. Instituto de Tecnología “Prof. Jorge A. Sabato”, UNSAM – Comisión Nacional de Energía Atómica, Av. Gral. Paz 1499, (1650), Buenos Aires, Argentina

    F. Saporiti, C. Ramos & P. Vázquez

  2. Department of Materials, CAC, UNSAM – Comisión Nacional de Energía Atómica, Av. Gral. Paz 1499, (1650), Buenos Aires, Argentina

    P. Bozzano & R. Versaci

  3. Department of Physics, CAC, UNSAM – Comisión Nacional de Energía Atómica, Av. Gral. Paz 1499, (1650), Buenos Aires, Argentina

    I. Raspini & C. Saragovi

Authors
  1. F. Saporiti
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  2. P. Bozzano
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  3. R. Versaci
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  4. C. Ramos
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  5. P. Vázquez
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  6. I. Raspini
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  7. C. Saragovi
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Saporiti, F., Bozzano, P., Versaci, R. et al. Characterization of the Laves Phases Zr(Cr,Fe)2 Oxidized in an Open Furnace Using Mössbauer Spectroscopy. Hyperfine Interactions 139, 379–386 (2002). https://doi.org/10.1023/A:1021227506637

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  • DOI: https://doi.org/10.1023/A:1021227506637

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