Kinetics and physical mechanisms of the growth of helium bubbles at dislocations

Ryazanov, A. I.; Arutyunova, G. A.; Бородин, В. А.; Sokursky, Yu.N.; Chuev, V.I.

doi:10.1016/0022-3115(82)90409-3

Cited by 16 publications

(3 citation statements)

References 8 publications

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“…In addition, dislocations were organized in hexagonal networks, a configuration already observed in uranium dioxide [1,10]. A parallel with Ryazanov's results on Ni [11] could explain this observation by a similar mechanism: pipe diffusion of gas atoms on dislocations. The results generated in this study give important information on bubble growth mechanisms, bubbles populations characteristics will be used to feed fission gas behaviour macroscopic models.…”

Section: Discussionsupporting

confidence: 69%

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A TEM Study of Bubbles Growth with Temperature in Xenon and Krypton Implanted Uranium Dioxide

Michel

Sabathier

Carlot

et al. 2012

DDF

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Transmission electron microscopy (TEM) characterizations were carried out on a set of UO2 thin foils previously implanted at room temperature with 400 keV Xe2+ and 250 keV Kr2+ ions at the fluence 7.1015 at.cm-2 (equivalent to 1 at.%/at. UO2). The experiment was devoted to the study of the evolution of the fission gases bubbles populations with increasing temperature. Annealings were performed in the laboratory furnace at 600°C, 800°C, 1000°C for 12h, 1400°C for 4h and 1500°C for 2h under Ar-5%H2 atmosphere. For each annealing condition and for as-implanted specimens the bubble population has been characterized in size and number density. A comparison between Xe and Kr has been done that showed a similar behaviour. Globally, from the as-implanted sample to the 1500°C annealed, the bubbles growth phenomenon and the microstructure evolution with temperature was put in relieve.

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Section: Discussionsupporting

confidence: 69%

“…A high density of fission gas bubbles and precipitates of solid fission products were observed, bubbles forming "strings" along dislocation lines. Ryazanov [11] irradiated Ni with alpha particles at 0.15%at. He.…”

Section: (B)mentioning

confidence: 99%

A TEM Study of Bubbles Growth with Temperature in Xenon and Krypton Implanted Uranium Dioxide

Michel

Sabathier

Carlot

et al. 2012

DDF

View full text Add to dashboard Cite

show abstract

“…The in-core migration energy is essentially lower than the bulk migration energy, E m b = 0.4 eV [2], which means the travel path of H diffusing along the dislocation line before detrapping, L d 0 , is expected to be significant. The latter can be estimated as follows [18]:…”

Section: Ab Initio Calculationsmentioning

confidence: 99%

Dislocation mechanism of deuterium retention in tungsten under plasma implantation

Dubinko

Grigorev

Bakaev

et al. 2014

J. Phys.: Condens. Matter

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We have developed a new theoretical model for deuterium (D) retention in tungsten-based alloys on the basis of its being trapped at dislocations and transported to the surface via the dislocation network with parameters determined by ab initio calculations. The model is used to explain experimentally observed trends of D retention under sub-threshold implantation, which does not produce stable lattice defects to act as traps for D in conventional models. Saturation of D retention with implantation dose and effects due to alloying of tungsten with, e.g. tantalum, are evaluated, and comparison of the model predictions with experimental observations under high-flux plasma implantation conditions is presented.

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Growth of helium pores in the vicinity of and at the grain boundaries

Ryazanov¹,

Arutyunova²,

Бородин³

et al. 1985

At Energy

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Kinetics and physical mechanisms of the growth of helium bubbles at dislocations

Cited by 16 publications

References 8 publications

A TEM Study of Bubbles Growth with Temperature in Xenon and Krypton Implanted Uranium Dioxide

A TEM Study of Bubbles Growth with Temperature in Xenon and Krypton Implanted Uranium Dioxide

Dislocation mechanism of deuterium retention in tungsten under plasma implantation

Growth of helium pores in the vicinity of and at the grain boundaries

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