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"The Effect of Short Oxidation Time on Zr(Fe,Cr)2 Laves Phases"
P.B. Bozzano, P.A. Vázquez, F. Saporiti, C. Ramos, R. Versaci and C. Saragovi
Proc. of the "26th International Conference on Applications of the Mössbauer Effect" (ICAME 2001), Oxford, United Kingdom, September 2-7, 2001. Ed. M.F. Thomas, J.M. Williams and T.C. Gibb
Hyperfine Interactions (C), Vol.5, Kluwer Academic Publishers (2002) 519-522
ISBN: 1-4020-1087-7
Two Laves phases Zr(Cr0.40Fe0.60)2 ((C14) hexagonal structure) and Zr(Cr0.15Fe0.85)2 ((C15) cubic structure) when oxidized 3 minutes in an open furnace were characterized by X-Ray diffraction (XRD) Mössbauer Spectroscopy (MS) techniques. Oxidation modified them but part of the original Laves phases remained. Zr2-xOxCr oxides, α-Cr, (Fe, Cr) oxides, α-Fe and α-Fe2O3 were formed. The presence of α-Fe sustains a model previously suggested for the oxidation of the Laves phases. On the other hand, the existence of α-Fe2O3 together with α-Fe suggest that 3 minutes is longer than the necessary time to follow the oxidation kinetics.
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