Molecular dynamics simulation study of helium bubble growth on W/Ta semi-coherent interface
| Autor: | Hongxian Xie, Kai Chen, Huiqiu Deng, Yanhui Qie |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Condensed matter physics Bubble Nucleation chemistry.chemical_element Statistics::Computation Physics::Geophysics Bimetal Physics::Fluid Dynamics Condensed Matter::Materials Science Molecular dynamics Nuclear Energy and Engineering chemistry Climb General Materials Science Wetting Dislocation Helium |
| Zdroj: | Journal of Nuclear Materials. 558:153340 |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/j.jnucmat.2021.153340 |
| Popis: | Molecular dynamics simulations were performed to investigate the nucleation and growth of helium bubble on W/Ta semi-coherent interface. It is found that misfit dislocation has a significant impact on the nucleation and growth of helium bubble. He bubble energetically prefers to nucleate at the intersections of the misfit dislocations or on some misfit dislocations. During the bubble growing process, metal interstitial atoms pushed out by the bubble are directly absorbed into nearby misfit dislocations, leading them to climb towards the Ta side; in turn, the climbed misfit dislocations induce He bubble moving away from the bimetal interface and into Ta side. Finally, the misfit dislocation effect on the bubble growth was further discussed in terms of wetting theory. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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