Phase composition study of bulk and surface layers of stabilized iron powder

Mossbauer spectroscopy and X-ray diffraction were used to study iron powders in process of their preparation by high temperature reduction of alpha -FeOOH in hydrogen. It was found that the following conversions occur both in the bulk and on the surface of the particles obtained in process of reduct...

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Bibliographic Details
Published in:Nanostructured materials 1998-06, Vol.12 (1-4), p.211-214
Main Authors: Yelsukov, E P, Mikhailik, O M, Konygin, G N, Mikhailova, S S, Povstugar, V I
Format: Article
Language:English
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Summary:Mossbauer spectroscopy and X-ray diffraction were used to study iron powders in process of their preparation by high temperature reduction of alpha -FeOOH in hydrogen. It was found that the following conversions occur both in the bulk and on the surface of the particles obtained in process of reduction of alpha -FeOOH up to alpha -Fe: equivalent to -FeOOH - > Fe sub 3 O sub 4 - > alpha -Fe. After the complete reduction a slight quantity of the gamma -FeOOH phase is present in the surface layer of iron particles in contrast to the bulk.
ISSN:0965-9773