The Stability of 9Cr-ODS oxide particles under heavy-ion irradiation

Allen, T. R.*; Gan, J.*; Cole, J.I.*; Ukai, Shigeharu  ; Shutthanandan, S.*; Thevuthasan, S.*

9Cr-ODS was irradiated with 5 MeV Ni ions at 500C to doses of 5, 50 and 150 dpa. No voids were detected for doses up to 150 dpa. The average size of the oxide particles slightly decreased with dose from roughly 12 nm for the unirradiated case to roughly 9 nm at 150 dpa. The decrease in size follows a square root of dose dependency, indicating the effect is radiation-induced. The decrease in size is not expected to have a detrimental effect on high temperature strength.