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Hydrogen effect on the sigma phase in Fe53.8Cr46.2
Authors: J. Cieslak, B.F.O. Costa, S.M. Dubiel, D. Fruchart, N.E. Skryabina
Ref.: Journal of Alloys and Compds 467, 182-186 (2009)
Abstract: Investigation of the stability and properties of a sigma-phase type compound Fe53.8Cr46.2 after electrochemical hydrogen treatment was made using X-ray diffraction and Fe-57 Mossbauer spectroscopy techniques. The amount of the hydrogen uptake was estimated to be equal to similar to 1.2H per unit formula, and its presence leads to an anisotropic cell parameter expansion. However, the hydrogenated state appears as metastable with reference to the aged samples analyzed a few days to months after loading with hydrogen. (C) 2008 Published by Elsevier B.V.
