Nanoscale characterisation of ODS-Eurofer 97 steel: An atom-probe tomography study

作者：Williams Ceri A^*; Marquis Emmanuelle A; Cerezo Alfred; Smith George D W

来源：Journal of Nuclear Materials, 2010, 400(1): 37-45.

DOI：10.1016/j.jnucmat.2010.02.007

Laser-pulsed atom-probe tomography has been used to study the nanoscale features present in an ODS-Eurofer 97 alloy. A core/shell structure was found for particles 5-10 nm in diameter. The particle cores were primarily Y and O, enriched with Mn and Si resulting in a metal (Y, Mn and Si) to oxygen ratio of M:O similar to 2:3. The similar to 2 nm thick outer-shell region of the particles exhibited partitioning of V, Cr, Ta, C and N together with the core elements in many cases. Detailed compositional measurements have also been made on the smallest of the yttria-based oxide clusters down to 2 nm in diameter. The 2 nm clusters were found to have a non-stoichiometric oxide composition, enriched in oxygen compared to Y(2)O(3), and evidence for the existence of a shell around these smaller particles was found.

• 出版日期2010-5-1