Modelling of dissolution profiles of ordered particles under irradiation
| Autor: | E. Camus, Syo Matsumura, Christian Abromeit |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Nuclear and High Energy Physics
Chemistry Analytical chemistry Mixing (process engineering) Thermodynamics Atom probe Physics::Geophysics law.invention Adiabatic theorem Nuclear Energy and Engineering law Transmission electron microscopy Microscopy Ginzburg–Landau theory General Materials Science Irradiation Dissolution Astrophysics::Galaxy Astrophysics |
| Zdroj: | Journal of Nuclear Materials. :246-250 |
| ISSN: | 0022-3115 |
| Popis: | The interpretation of experiments on the stability of ordered precipitates in irradiation environments demands the detailed knowledge of the 3-d concentration profiles during the dissolution under the irradiation. They can be calculated by a numerical solution of the appropriate time-differential Ginzburg–Landau (TDGL) equations in adiabatic approximation. The profiles are used for the discussion of the experimentally investigated interdependence of dissolution and disordering of the ordered precipitates under irradiation by field-ion microscopy with atom probe (FIM-AP) and by transmission electron microscopy (TEM). Theoretical correlation coefficients are calculated for various composition profiles. By comparison with the correlation coefficients determined from the experimental FIM-AP data, the dissolution process could be identified. At low temperatures, the ballistic mixing is dominant and the precipitate dissolves by a normal diffusion process. At higher temperatures, the profiles have a non-Gaussian shape during dissolution. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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