Abstract
The role of oxide nanoparticles in cavity formation of a nano-oxide-dispersed ferritic steel subjected to (Fe + He) dual-ion and (Fe + He + H) triple-ion irradiations has been studied using transmission electron microscopy to elucidate the synergistic effects of helium and hydrogen on radiation tolerance of nano-oxide-dispersed ferritic steel for fusion energy systems. The effect of oxide nanoparticles on suppressing radiation-induced void swelling is clearly revealed from the observation of preferred trapping of helium bubbles at oxide nanoparticles, which results in a unimodal distribution of cavities in the (Fe + He) dual-ion irradiated specimen. An adverse effect of hydrogen implantation, however, is revealed from the observation of a bimodal distribution of cavities with large and facetted voids in association with the formation of HFe5O8-based hydroxide in local regions of the (Fe + He + H) triple-ion irradiated specimen.
| Original language | English |
|---|---|
| Pages (from-to) | 1761-1769 |
| Number of pages | 9 |
| Journal | MRS Advances |
| Volume | 3 |
| Issue number | 31 |
| DOIs | |
| State | Published - 2018 |
Funding
This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. The authors would like to thank Prof Akihiko Kimura of Kyoto University for providing MA 16Cr-ODS steel used for this study.
| Funders | Funder number |
|---|---|
| Lawrence Livermore National Laboratory | DE-AC52-07NA27344 |
| Kyoto University |
Keywords
- ion-solid interactions
- nanostructure
- transmission electron microscopy (TEM)
