Phase separation in nanomaterials - development of models and simulation techniques
dc.contributor.advisor | Erdélyi, Zoltán | |
dc.contributor.advisor | Zapolsky, Helena | |
dc.contributor.author | B. Gajdics, Bence Dániel | |
dc.contributor.department | Fizikai tudományok doktori iskola | hu |
dc.contributor.submitterdep | DE--Természettudományi és Technológiai Kar -- Fizikai Tudományok Doktori Iskola | |
dc.date.accessioned | 2021-12-13T13:20:11Z | |
dc.date.available | 2021-12-13T13:20:11Z | |
dc.date.created | 2020 | hu_HU |
dc.date.defended | 2021-12-17 | |
dc.description.abstract | In recent decades, nanomaterials have been at the forefront of investigations in the field of materials science, due to their beneficial size-dependent properties in many instances. The goal of this work was the development of atomistic models and new computer simulation techniques to describe phase separation in nanomaterials. The so-called Stochastic kinetic mean-field (SKMF) model has been further developed. In order to better understand the asymmetrical miscibility gap of binary systems, the gradient energy coefficient-composition function κ(c) was calculated from the interaction energy V (c) of a solution. This improved SKMF model was applied to simulate spinodal decomposition and nucleation in the Ag-Cu alloy and nanoparticles. The simulation results were compared with experimental observations of Ag-Cu nanoparticles. It was shown that the surface composition values are close to the ones calculated from a single-layer Fowler-Guggenheim approximation. I also demonstrated that this method is able to reproduce the Gibbs-Thomson effect. In addition, a new quantitative multiscale procedure based on the SKMF and phase-field models were developed to study the nucleation-growth-coarsening process in alloys. | hu_HU |
dc.description.corrector | hbk | |
dc.format.extent | 94 | hu_HU |
dc.identifier.uri | http://hdl.handle.net/2437/326302 | |
dc.language.iso | hu | hu_HU |
dc.language.iso | en | hu_HU |
dc.subject | phase separation | hu_HU |
dc.subject | fázisszeparáció | |
dc.subject | nanomaterials | |
dc.subject | nanoanyagok | |
dc.subject | simulation | |
dc.subject | szimuláció | |
dc.subject.discipline | Fizikai tudományok | hu |
dc.subject.sciencefield | Természettudományok | hu |
dc.title | Phase separation in nanomaterials - development of models and simulation techniques | hu_HU |
dc.title.translated | Fázisszeparáció nanoanyagokban - modellek és szimulációs módszerek fejlesztése | hu_HU |
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