Radiation induced homogeneous precipitation in undersaturated solid-solutions

Cauvin, R.; Martin, G.

doi:10.1016/0022-3115(79)90593-2

Cited by 74 publications

(19 citation statements)

References 32 publications

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“…In other words, trapping of point defects in solute-rich locations plays in RIP the same role as sinks in RIS. Experimental observations of RIP were reported for a number of alloys, including Ni-Si, 7,8 Al-Zn, 9 and Cu-Ni. 10 Several theoretical treatments of RIP exist, 11,12 but they involve a large number of assumptions that are hard to validate.…”

Section: Effective Temperature Modelmentioning

confidence: 94%

Precipitate stability and morphology in irradiation environments

Krasnochtchekov

Averback

Bellon

2007

JOM

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A solid under irradiation constitutes a nonequilibrium dynamical system, and therefore the modeling of phase stability in such systems requires a kinetic approach. This paper presents some recent advances in the atomistic modeling of precipitation under irradiation, using kinetic Monte Carlo simulations. It illustrates that vacancy-assisted and thermodynamically driven phase separation, in competition with forced atomic mixing promoted by nuclear collisions, can lead to three very different outcomes: dissolution of pre-existing precipitates, the formation of compositional patterns at the nanoscale, or macroscopic decomposition. Interstitial transport, on the other hand, when coupled with solute fl uxes, can induce the precipitation of mushy precipitates, even in ideal alloy systems. These diverse phase evolutions are shown to be rationalized by continuum modeling.

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Section: Effective Temperature Modelmentioning

confidence: 94%

Precipitate stability and morphology in irradiation environments

Krasnochtchekov

Averback

Bellon

2007

JOM

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“…But homogeneous RIP of coherent precipitates has also been observed, for example, in Al-Zn alloys. 51 Cauvin and Martin 52 have proposed a mechanism that explains such a decomposition. A solid solution contains fluctuations of composition.…”

Section: Ris and Precipitationmentioning

confidence: 99%

Radiation-Induced Segregation

Nastar

Soisson

2012

Comprehensive Nuclear Materials

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“…The Onsager matrix containing the transport coefficients is an n 2 matrix, where n is the number of species in the system. The diagonal coefficients can be related to diffusion coefficients in the dilute limit, while the off-diagonal coefficients dictate the flux coupling phenomenon which is responsible for effects such as radiation-induced segregation 37 and radiation-induced precipitation 38,39 .…”

Section: Introductionmentioning

confidence: 99%

Transport properties in dilute UN(X) solid solutions (X=Xe,Kr)

et al. 2016

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Uranium nitride (UN) is a candidate fuel for current GEN III fission reactors, for which it is investigated as an accident-tolerant fuel, as well as for future GEN IV reactors. In this study, we investigate the kinetic properties of gas fission products (Xe and Kr) in UN. Binding and migration energies are obtained using density functional theory, with an added Hubbard correlation to model f -electrons, and the Occupation Matrix Control scheme to avoid metastable states. These energies are then used as input for the Self-Consistent Mean Field method which enables to determine transport coefficients for vacancy-mediated diffusion of Xe and Kr on the U-sublattice. The magnetic ordering of the UN structure is explicitly taken into account, for both energetic and transport properties. Solute diffusivities are compared with experimental measurements and the effect of various parameters on the theoretical model is carefully investigated. We find that kinetic correlations are very strong in this system, and that despite atomic migration anisotropy, macroscopic solute diffusivities show limited anisotropy. Our model indicates that the discrepancy between experimental measurements probably results from different irradiation conditions, and hence different defect concentrations.

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Radiation induced homogeneous precipitation in undersaturated solid-solutions

Cited by 74 publications

References 32 publications

Precipitate stability and morphology in irradiation environments

Precipitate stability and morphology in irradiation environments

Radiation-Induced Segregation

Transport properties in dilute UN(X) solid solutions (X=Xe,Kr)

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