Kinetics of grain boundary segregation in multicomponent systems – The example of a Mo-C-B-O system
| Autor: | Franz Dieter Fischer, Daniel Scheiber, Lorenz Romaner, Jiri Svoboda |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Kinetic model Mechanical Engineering Kinetics Metals and Alloys Thermodynamics 02 engineering and technology Trapping 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Mechanics of Materials Impurity 0103 physical sciences Multicomponent systems General Materials Science Grain boundary 0210 nano-technology |
| Zdroj: | Scripta Materialia. 150:110-114 |
| ISSN: | 1359-6462 |
| DOI: | 10.1016/j.scriptamat.2018.03.011 |
| Popis: | A model for kinetics of segregation of several interstitial and substitutional components to different kinds of traps at grain boundaries is derived by applying the Thermodynamic Extremal Principle. Evolution equations for the site fractions of the segregating elements at the grain boundary, considered as independent variables, are presented and solved numerically. The kinetic model is applied to the case of Mo containing C, O, and B as impurities and a spectrum of trapping energies obtained from first principles simulations. This newly developed model offers an efficient tool for understanding segregation from several kinds of components at different types of traps. |
| Databáze: | OpenAIRE |
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