Bubble-to-void transition promoted by oxide nanoparticles in ODS-EUROFER steel ion implanted to high He content

JOURNAL OF NUCLEAR MATERIALS

卷:545

Article

Emelyanova, O.^1,2  Gentils, A.¹  Borodin, V. A.^2,3  Ganchenkova, M. G.²  Vladimirov, P. V.^3,4  Dzhumaev, P. S.²  Golovchanskiy, I. A.^5,6  Lindau, R.⁴  Moeslang, A.⁴ 

[1] Univ Paris Saclay, CNRS, IN2P3, IJCLab, F-91405 Orsay, France

[2] Natl Res Nucl Univ MEPhI, Moscow 115409, Russia

[3] Kurchatov Inst, Natl Res Ctr, Moscow 123182, Russia

[4] Karlsruhe Inst Technol, IAM AWP, D-76344 Eggenstein Leopoldshafen, Germany

[5] Natl Univ Sci & Technol MISiS, Moscow 119049, Russia

[6] Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Russia

关键词: ODS-EUROFER steel;    Ion implantation;    TEM;    Helium;    Cavities;    Swelling;    Bubble-to-void transition;    Modeling;   

DOI  :  10.1016/j.jnucmat.2020.152724

来源: Elsevier

【 摘 要 】

The paper deals with a detailed study of He-filled cavity ensemble development in ODS-EUROFER steel implanted with 10 keV helium ions to a high peak concentration of 8.5 x 10(3) appm both with and without simultaneous irradiation with 4 MeV gold ions, which allowed us to strongly vary the ratios of dpa/He introduction. The subsequent transmission electron microscopy examination reveals excellent radiation stability of He-implanted sample in the single-beam implantation mode. In contrast, after the simultaneous dual-beam irradiation a bubble-to-void transition was observed for bubbles that were associated with yttria nanoparticles. The relative importance of different He bubble families observed in the He-implanted samples for the swelling accumulation is quantitatively assessed, emphasizing the potential risks of abrupt swelling acceleration in the case of bubble-to-void transition launched by nanoparticles. A model of bubble-to-void transition for gas bubbles associated with spherical second-phase particles is developed and used to rationalize experimental observations. (C) 2020 EURATOM. Published by Elsevier B.V. All rights reserved.

【 授权许可】

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