Void bias factors due to the anisotropy of the point defect diffusion

Borodin, V.A.; Ryazanov, A. I.; Abromeit, C.

doi:10.1016/0022-3115(93)90266-2

Cited by 28 publications

(13 citation statements)

References 13 publications

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“…Vacancies are absorbed almost only through the 100 directions. In a similar way, anisotropic concentration fields around the cavity were found by Borodin et al [39]. Qualitatively, it can be explained by the curvature of the point defect trajectories (Fig.…”

Section: Analysis and Discussionsupporting

confidence: 83%

“…In the same way as for dislocations, cavity sink strengths have been determined by analytical calculations, taking into account the diffusion anisotropy [39].…”

Section: Analysis and Discussionmentioning

confidence: 99%

“…Although this effect had been discussed previously [31,32,33], these authors also suggested that the anisotropy of point defects at saddle position could have an effect on the sink strength. Such an effect was later confirmed for straight dislocations [34,35,36,37], infinitesimal dislocation loops [38] and voids [39]. However, all these works contain approximations to make calculations tractable, so the values of sink strengths significantly vary from one study to the other [37].…”

Section: Introductionmentioning

confidence: 93%

“…This cavity is a perfect sink with a constant radius r c , with a capture radius of d reac = r c + r PD where r PD is the point defect radius (r PD = 0.16 nm). The cavity density only depends on the box dimensions and is given by ρ = 1/d 3 , so different densities can be studied by varying the box dimension d. The strain field generated by a cavity is calculated after the expressions given in [80,39]:…”

Section: Case Definitionmentioning

confidence: 99%

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Effect of saddle point anisotropy of point defects on their absorption by dislocations and cavities

et al. 2017

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International audienceDeveloping predictive models for the microstructure evolution of materials requires an accurate description of the point defects fluxes to the different sinks, such as dislocations, grain boundaries and cavities. This work aims at improving the evaluation of sink strengths of dislocations and cavities using object kinetic Monte-Carlo simulations parametrized with density functional theory calculations. The present accurate description of point defects migration enables quantitative assessment of the influence of the point defects anisotropy at saddle point. The results in aluminum show that the anisotropy at saddle point has a large influence on sink strengths. In particular, this anisotropy leads to the cavity being a biased sink. These results are explained by the analysis of the point defect trajectories to the sinks, which are shown to be strongly affected by the saddle point anisotropy

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Section: Analysis and Discussionsupporting

confidence: 83%

“…In the same way as for dislocations, cavity sink strengths have been determined by analytical calculations, taking into account the diffusion anisotropy [39].…”

Section: Analysis and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 93%

Section: Case Definitionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of saddle point anisotropy of point defects on their absorption by dislocations and cavities

et al. 2017

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“…where l C is the shear modulus of the inclusion, X n the point defect relaxation volume, a l n the PD polarizability, r rr the normal stress at the inclusion boundary, d 2 n and d 3 n the independent components of the`elastodiusion tensor' [17], and n is the elastic anisotropy parameter.…”

Section: Bias Of Spherical Inclusions Due To Elastic Interaction Diermentioning

confidence: 99%

Theory of the late stage of radiolysis of alkali halides

Dubinko

Turkin

Vainshtein

et al. 2000

Journal of Nuclear Materials

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Recent results on heavily irradiated natural and synthetic NaCl crystals give evidence for the formation of large vacancy voids, which were not addressed by the conventional Jain±Lidiard model of radiation damage in alkali halides. This model was constructed to describe metal colloids and dislocation loops formed in alkali halides during earlier stages of irradiation. We present a theory based on a new mechanism of dislocation climb, which involves the production of V F centers (self-trapped hole neighboring a cation vacancy) as a result of the absorption of excess H centers. Voids are shown to arise due to the reaction between F and V F centers at the surface of halogen bubbles. Critical parameters associated with the bubble-to-void transition are evaluated. Voids can grow to sizes exceeding the mean distance between colloids and bubbles, eventually absorbing them, and, hence, igniting a back reaction between the halogen gas and metal. The amount of radiation damage in alkali halides should be evaluated with account of void formation, which strongly aects the radiation stability of material.

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The effect of swelling on SIPA irradiation creep

Бородин

1995

Journal of Nuclear Materials

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Void bias factors due to the anisotropy of the point defect diffusion

Cited by 28 publications

References 13 publications

Effect of saddle point anisotropy of point defects on their absorption by dislocations and cavities

Effect of saddle point anisotropy of point defects on their absorption by dislocations and cavities

Theory of the late stage of radiolysis of alkali halides

The effect of swelling on SIPA irradiation creep

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