Stability of nano-oxides upon heavy ion irradiation of an ODS material

Ribis, J.; Lescoat, M.-L.; Carlan, Y. de; Costantini, Jean‐Marc; Monnet, I.; Cozzika, T.; Delabrouille, F.; Malaplate, J.

doi:10.1016/j.jnucmat.2010.12.068

Cited by 27 publications

(11 citation statements)

References 19 publications

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“…In some studies, oxide NPs are observed to amorphize under irradiation, but not necessarily decrease in size or number density [9], [20], [35], [42]- [47]. In some cases, irradiation-amorphized NPs coexist with NPs that remain crystalline [8].…”

Section: Crystal Structurementioning

confidence: 99%

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A review of the irradiation evolution of dispersed oxide nanoparticles in the b.c.c. Fe-Cr system: Current understanding and future directions

Wharry

Swenson

Yano

2017

Journal of Nuclear Materials

104

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Thus far, a number of studies have investigated the irradiation evolution of oxide nanoparticles in b.c.c. Fe-Cr based oxide dispersion strengthened (ODS) alloys. But given the inconsistent experimental conditions, results have been widely variable and inconclusive. Crystal structure and chemistry changes differ from experiment to experiment, and the total nanoparticle volume fraction has been observed to both increase and decrease. Furthermore, there has not yet been a comprehensive review of the archival literature. In this paper, we summarize the existing studies on nanoparticle irradiation evolution. We note significant observations with respect to oxide nanoparticle crystallinity, composition, size, and number density. We discuss three possible contributing mechanisms for nanoparticle evolution: ballistic dissolution, Ostwald ripening, and irradiation-enhanced diffusion. Finally, we propose future directions to achieve a more comprehensive understanding of irradiation effects on oxide nanoparticles in ODS alloys.

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Section: Crystal Structurementioning

confidence: 99%

“…the nature of the oxide, the irradiation dose, and the irradiation temperature [43], [47]. Of these factors, temperature is most well-understood, and a critical amorphization temperature can be determined for any given ODS system and irradiation conditions [43].…”

Section: Crystal Structurementioning

confidence: 99%

A review of the irradiation evolution of dispersed oxide nanoparticles in the b.c.c. Fe-Cr system: Current understanding and future directions

Wharry

Swenson

Yano

2017

Journal of Nuclear Materials

104

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“…Interior nano-sized oxides present a strong pinning effect to maintain the high density of dislocations and to restrain grain growth at high operating temperatures20. However, despite these advantages, the ODS steels themselves are not immune to irradiation: under irradiation, solute atoms redistribute at the M/O interface, which results in the degradation of the existing oxide phases212223 and/or the nucleation of deleterious phases. For example, under irradiation, recoil resolution happens in one type of ODS ferritic steels (Fe − 13Cr − 1.5Mo + 1TiO 2 + 0.5Y 2 O 3 )24 and halos of finer particles have been observed25.…”

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confidence: 99%

Cr incorporated phase transformation in Y2O3 under ion irradiation

Yadav

et al. 2017

Sci Rep

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Under irradiation, chemical species can redistribute in ways not expected from equilibrium behavior. In oxide-dispersed ferritic alloys, the phenomenon of irradiation-induced Cr redistribution at the metal/oxide interfaces has drawn recent attention. Here, the thermal and irradiation stability of the FeCr/Y2O3 interface has been systematically studied. Trilayer thin films of 90 nm Fe - 20 at.% Cr (1st layer)/100 nm Y2O3 (2nd layer)/135 nm Fe - 20 at.% Cr (3rd layer) were deposited on MgO substrates at 500 °C. After irradiation, Cr diffuses towards and enriches the FeCr/Y2O3 interface. Further, correlated with Cr redistributed into the oxide, an amorphous layer is generated at the interface. In the Y2O3 layer, the original cubic phase is observed to transform to the monoclinic phase after irradiation. Meanwhile, nanosized voids, with relatively larger size at interfaces, are also observed in the oxide layer. First-principles calculations reveal that Cr substitution of Y interstitials in Y2O3 containing excess Y interstitials is favored and the irradiation-induced monoclinic phase enhances this process. Our findings provide new insights that may aid in the development of irradiation resistant oxide-dispersed ferritic alloys.

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“…Oxide nanoclusters have been observed to amorphize to varying degrees upon irradiation [59,92,97,101,103,104,108,109,135]. The extent of amorphization is attributed to three factors: 1) the structure of the oxides, 2) irradiation dose, and 3) irradiation temperature [109,135].…”

Section: Crystal Structurementioning

confidence: 99%

“…The extent of amorphization is attributed to three factors: 1) the structure of the oxides, 2) irradiation dose, and 3) irradiation temperature [109,135]. Of these three influences, the effect of irradiation dose and the structure of the oxides are the least understood, while a critical amorphization temperature may be determined for any given system and irradiation condition [135].…”

Section: Crystal Structurementioning

confidence: 99%

The Mechanism of Radiation-Induced Nanocluster Evolution in Oxide Dispersion Strengthened and Ferritic-Martensitic Alloys

Swenson¹

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Stability of nano-oxides upon heavy ion irradiation of an ODS material

Cited by 27 publications

References 19 publications

A review of the irradiation evolution of dispersed oxide nanoparticles in the b.c.c. Fe-Cr system: Current understanding and future directions

A review of the irradiation evolution of dispersed oxide nanoparticles in the b.c.c. Fe-Cr system: Current understanding and future directions

Cr incorporated phase transformation in Y2O3 under ion irradiation

The Mechanism of Radiation-Induced Nanocluster Evolution in Oxide Dispersion Strengthened and Ferritic-Martensitic Alloys

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