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Nano-Oxide-Dispersed Ferritic Steel for Fusion Energy Systems

Published online by Cambridge University Press:  19 February 2018

L. L. Hsiung ,
S. J. Tumey ,
D. T. Hoelzer  and
M. J. Fluss
L. L. Hsiung*
Affiliation:
Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA94550
S. J. Tumey
Affiliation:
Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA94550
D. T. Hoelzer
Affiliation:
Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN37831
M. J. Fluss
Affiliation:
Nuclear Engineering Department, University of California Berkeley, Berkeley, CA94720
*
*(Email: hsiung1@llnl.gov)
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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.

Keywords

ion-solid interactionsnanostructuretransmission electron microscopy (TEM)
Type
Articles
Information
MRS Advances , Volume 3 , Issue 31: Energy and Sustainability , 2018 , pp. 1761 - 1769
Copyright
Copyright © Materials Research Society 2018 

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References

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