Kinetics and Formation Mechanisms of a Nanostructured Fe-Y2O3 Powder Prepared by Reactive Ball Milling

Abstract:

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Reactive high energy ball-milling has known a growing interest from both fundamental and applied point of view. We focus here on the specific system Fe-Y2O3 metal-oxide nanocomposite because of its potential application to the synthesis of oxide dispersion strengthened steels, which are promising materials for nuclear applications. YFe3 and Fe2O3 were ball-milled during different milling durations in the stoichiometric proportions defined by the chemical reaction 2 YFe3 + Fe2O3 → 8 Fe + Y2O3. The obtained milled powder was characterized by XRD, SEM, TEM and their thermal behaviour was investigated by DTA. Through those characterizations, a Mechanically induced Self-propagating Reaction (MSR) was observed and several steps in the ball-milling process were identified: mixing of reactants, chemical reaction propagation, amorphization and refinement of the microstructure. The role of the milling intensity was also examined.

Info:

Periodical:

Solid State Phenomena (Volumes 172-174)

Edited by:

Yves Bréchet, Emmanuel Clouet, Alexis Deschamps, Alphonse Finel and Frédéric Soisson

Pages:

691-696

DOI:

10.4028/www.scientific.net/SSP.172-174.691

Citation:

M. Couvrat et al., "Kinetics and Formation Mechanisms of a Nanostructured Fe-Y2O3 Powder Prepared by Reactive Ball Milling", Solid State Phenomena, Vols. 172-174, pp. 691-696, 2011

Online since:

June 2011

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$35.00

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