Microstructural Evolution of Irradiated Ceramics

Kinoshita, Chiken

doi:10.1007/978-1-4020-5295-8_8

Cited by 3 publications

(1 citation statement)

References 53 publications

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“…Explanation for the radiation resistance and microstructure stability of MgAl2O4 was reviewed in the first edition of the Comprehensive Nuclear Materials, with a comparison of α-Al2O3 from a view point of the difference in the stacking layer of {111} planes, 257 and in others. 258,259 In this section, we will review the mechanism of the microstructure stability, dimensional and mechanical properties of MgAl2O4, and will introduce an attempt to understand the microstructure stability of normal structure spinel oxides from the rearrangement of correlated nanoscale domains.…”

Section: Introductionmentioning

confidence: 99%

Radiation-Induced Effects on Material Properties of Ceramics: Mechanical and Dimensional Properties

Yasuda

Costantini

Baldinozzi

2020

Comprehensive Nuclear Materials

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Section: Introductionmentioning

confidence: 99%

Radiation-Induced Effects on Material Properties of Ceramics: Mechanical and Dimensional Properties

Yasuda

Costantini

Baldinozzi

2020

Comprehensive Nuclear Materials

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Early stages of irradiation induced dislocations in urania

Chartier

Onofri

Brutzel

et al. 2016

Applied Physics Letters

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The early stages of nucleation and growth of dislocations by irradiation in urania is clarified based on the combination of experiments and atomistic calculations. It is established that irradiation induced dislocations follow a five stage process: (i) point defects are first created by irradiation, (ii) they aggregate into clusters, (iii) from which nucleate Frank loops, (iv) which transform into unfaulted loops via Shockley that in turn grow, and (v) finally reorganize into forest dislocations. Stages (i)–(iii) participate in the lattice expansion while the onset of lattice contraction starts with stage (iv), i.e., when unfaulted loops nucleate. Irradiation induced dislocations operate in the spontaneous recombination regime, to be opposed to the thermal diffusion regime. Body of arguments collaborates to this statement, the main one is the comparison between characteristic distances estimated from the dose rate (Vat/(K0×τ))13 and from the diffusion coefficient (D×τ)12. Such a comparison identifies materials under irradiation as belonging either into the recombination regime or not.

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