Investigation of oxide particles in unirradiated ODS Eurofer by tomographic atom probe

Investigation of oxide particles in unirradiated ODS Eurofer by tomographic atom probe

Oxide dispersion strengthened steels possess better high-temperature creep and radiation resistance than conventionally produced ferritic/martensitic steels. This behaviour is mainly caused by the presence of highly dispersed and extremely stable oxide particles with diameters of a few nanometers. I...

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Veröffentlicht in:Journal of nuclear materials 2011-02, Vol.409 (2), p.65-71
Hauptverfasser: Aleev, A.A., Iskandarov, N.A., Klimenkov, M., Lindau, R., Möslang, A., Nikitin, A.A., Rogozhkin, S.V., Vladimirov, P., Zaluzhnyi, A.G.
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container_end_page 71
container_issue 2
container_start_page 65
container_title Journal of nuclear materials
container_volume 409
creator Aleev, A.A.
Iskandarov, N.A.
Klimenkov, M.
Lindau, R.
Möslang, A.
Nikitin, A.A.
Rogozhkin, S.V.
Vladimirov, P.
Zaluzhnyi, A.G.
description Oxide dispersion strengthened steels possess better high-temperature creep and radiation resistance than conventionally produced ferritic/martensitic steels. This behaviour is mainly caused by the presence of highly dispersed and extremely stable oxide particles with diameters of a few nanometers. In this work the nanostructure of ODS Eurofer steel was investigated by means of tomographic atom probe and correlations with recent TEM and SANS studies were derived. The present investigation revealed nanoscaled clusters of typically 2 nm diameter containing not only yttrium and oxygen but also vanadium and nitrogen. Moreover, concentration of vanadium in particles was found to be higher than that of yttrium, which indicates the importance of these elements in cluster formation. The estimated average cluster number density is about 2 × 10 24 m −3. These enriched zones might be evidently attributed to precursors of the larger precipitates observed by TEM. This conclusion is also supported by the similarities of the chemical composition inside enriched zones seen in both atomic probe and TEM data.
doi_str_mv 10.1016/j.jnucmat.2010.09.008
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title Investigation of oxide particles in unirradiated ODS Eurofer by tomographic atom probe
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