Effect of hydrogen atom concentration on hydrogen migration and bubble evolution in bcc iron
| Autor: | Cheng Chen, Liping Guo, Ning Gao, Dong Wang, Yaxia Wei |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Hydrogen Bubble Molecular statics chemistry.chemical_element 02 engineering and technology Hydrogen atom Radiation 021001 nanoscience & nanotechnology 01 natural sciences Molecular dynamics chemistry Chemical physics Lattice (order) 0103 physical sciences Atom Physics::Atomic Physics 010306 general physics 0210 nano-technology Instrumentation |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 461:83-87 |
| ISSN: | 0168-583X |
| DOI: | 10.1016/j.nimb.2019.09.025 |
| Popis: | The effect of the concentration of hydrogen (H) atoms on the hydrogen diffusion and evolution of hydrogen bubbles in body-centered cubic iron was investigated using molecular statics and molecular dynamics methods. The simulation results indicate that the local accumulation of H atoms can significantly influence their migration. Compared to the isolated H in a perfect lattice, the H atoms in a high-concentration H-cluster are trapped. After collecting a sufficient amount of hydrogen atoms, the H-vacancy cluster will push out one hydrogen atom instead of a self-interstitial atom, which indicates that loop-punching will not dominate the H-bubble growth in bcc iron. These results will provide a new understanding for the hydrogen-induced radiation damages in nuclear materials. |
| Databáze: | OpenAIRE |
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