Core/shell structures of oxygen-rich nanofeatures in oxide-dispersion strengthened Fe-Cr alloys

Journal Article · Mon Nov 03 00:00:00 EST 2008 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3000965· OSTI ID:21175702

Marquis, Emmanuelle A ^[1]

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1. Department of Materials, University of Oxford, Oxford OX1 3PH (United Kingdom)

With the significant improvement in high temperature creep properties and resistance to radiation damage by addition of nanoscale oxide features, oxide-dispersion strengthened (ODS) ferritic/martensitic alloys are potential candidates for structural applications in nuclear fusion reactors. The structure of the oxygen-rich nanofeatures was analyzed by atom-probe tomography in three ODS alloys: MA957, ODS Fe-12 wt %Cr, and ODS Eurofer-97. Although field evaporation and reconstruction of the precipitates suffer from artefacts, a core/shell structure is found even for very small precipitates. Precipitate cores are Y rich while shell regions are enriched in Ti, Cr, or V depending on alloy composition.

• OSTI ID: 21175702
• Journal Information: Applied Physics Letters, Vol. 93, Issue 18; Other Information: DOI: 10.1063/1.3000965; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM ALLOYS
CREEP
DISPERSIONS
EVAPORATION
FERRITIC STEELS
IRON ALLOYS
MARTENSITIC STEELS
NANOSTRUCTURES
OXIDES
PHYSICAL RADIATION EFFECTS
PRECIPITATION
THERMONUCLEAR REACTOR MATERIALS
TITANIUM ALLOYS
TOMOGRAPHY
VANADIUM ALLOYS
YTTRIUM ALLOYS