Nanoscale characterisation and clustering mechanism in an Fe–Y2O3 model ODS alloy processed by reactive ball milling and annealing / M. Brocq in Acta materialia, Vol. 58 N° 5 (Mars 2010)  

Public ISBD [article]  inActa materialia > Vol. 58 N° 5 (Mars 2010) . - pp. 1806–1814 Titre : Nanoscale characterisation and clustering mechanism in an Fe–Y2O3 model ODS alloy processed by reactive ball milling and annealing Type de document : texte imprimé Auteurs : M. Brocq, Auteur ; B. Radiguet, Auteur ; J.-M. Le Breton, Auteur Année de publication : 2011 Article en page(s) : pp. 1806–1814 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Oxide dispersion strengthened steel Mechanical milling Tomographic atom probe X-ray diffraction Mössbauer spectroscopy Résumé : Reactive ball milling and annealing is proposed as a new production method for oxide dispersion strengthened (ODS) steels. A highly concentrated Fe–38 atm.% Y2O3 ODS model alloy was processed by reactive ball milling and annealing of YFe3 and Fe2O3 powders so as to induce the chemical reaction 2YFe3 + Fe2O3 → 8Fe + Y2O3. The model alloy was characterised after milling and annealing by complementary techniques, including atom probe tomography. Ball milling up to the stationary state results in the formation of two metastable nanometric interconnected phases: super-saturated α-iron and an yttrium and oxygen rich phase. Annealing leads the system towards equilibrium through: (i) a chemical evolution of each phase to nearly pure α-Fe and Y2O3 oxide slightly sub-stoichiometric in oxygen; and (ii) growth of the phases. A pure iron matrix reinforced by nanometric Y2O3 particles was successfully synthesised by reactive ball milling and annealing. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409008015 [article] Nanoscale characterisation and clustering mechanism in an Fe–Y2O3 model ODS alloy processed by reactive ball milling and annealing [texte imprimé] / M. Brocq, Auteur ; B. Radiguet, Auteur ; J.-M. Le Breton, Auteur . - 2011 . - pp. 1806–1814. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 5 (Mars 2010) . - pp. 1806–1814 Mots-clés : Oxide dispersion strengthened steel Mechanical milling Tomographic atom probe X-ray diffraction Mössbauer spectroscopy Résumé : Reactive ball milling and annealing is proposed as a new production method for oxide dispersion strengthened (ODS) steels. A highly concentrated Fe–38 atm.% Y2O3 ODS model alloy was processed by reactive ball milling and annealing of YFe3 and Fe2O3 powders so as to induce the chemical reaction 2YFe3 + Fe2O3 → 8Fe + Y2O3. The model alloy was characterised after milling and annealing by complementary techniques, including atom probe tomography. Ball milling up to the stationary state results in the formation of two metastable nanometric interconnected phases: super-saturated α-iron and an yttrium and oxygen rich phase. Annealing leads the system towards equilibrium through: (i) a chemical evolution of each phase to nearly pure α-Fe and Y2O3 oxide slightly sub-stoichiometric in oxygen; and (ii) growth of the phases. A pure iron matrix reinforced by nanometric Y2O3 particles was successfully synthesised by reactive ball milling and annealing. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409008015

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