Atom probe tomography of nanoscaled features of oxide-dispersion-strengthened ODS Eurofer steel in the initial state and after neutron irradiation

作者：Rogozhkin S V^*; Aleev A A; Zaluzhnyi A G; Iskanderov N A; Nikitin A A; Vladimirov P; Lindau R; Moeslang A

来源：Physics of Metals and Metallography, 2012, 113(1): 98-105.

DOI：10.1134/S0031918X12010103

• heavy ions
• imitation irradiation
• materials for nuclear engineering
• radiation damage

Atom probe tomography has been used to investigate nanoscale features in the yttrium oxide dispersion strengthened steel ODS Eurofer, which is a perspective structural material for the reactor cores. In the initial material, a large number (similar to 2 x 10(24) m(-3)) of ultrafine (similar to 2.5 nm in diameter) clusters enriched in yttrium, oxygen, nitrogen, and vanadium have been revealed. The investigation of the ODS Eurofer steel irradiated at 330A degrees C to 32 dpa in the BOR-60 fast reactor has also revealed a large number of ultrafine (1-3 nm in diameter) nanoclusters significantly enriched in yttrium, oxygen, manganese, and chromium. In the irradiated material, an increase in the concentration of clusters and changes in the chemical composition of the clusters and matrix have been noted. The irradiation by fast neutrons leads to a partial transition of vanadium from the clusters into the surrounding matrix and to a general increase in the concentrations of yttrium and oxygen in the volumes under investigation.

• 出版日期2012-1