Phase separation in nanomaterials - development of models and simulation techniques

dc.contributor.advisorErdélyi, Zoltán
dc.contributor.advisorZapolsky, Helena
dc.contributor.authorB. Gajdics, Bence Dániel
dc.contributor.departmentFizikai tudományok doktori iskolahu
dc.contributor.submitterdepDE--Természettudományi és Technológiai Kar -- Fizikai Tudományok Doktori Iskola
dc.date.accessioned2021-12-13T13:20:11Z
dc.date.available2021-12-13T13:20:11Z
dc.date.created2020hu_HU
dc.date.defended2021-12-17
dc.description.abstractIn 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.correctorhbk
dc.format.extent94hu_HU
dc.identifier.urihttp://hdl.handle.net/2437/326302
dc.language.isohuhu_HU
dc.language.isoenhu_HU
dc.subjectphase separationhu_HU
dc.subjectfázisszeparáció
dc.subjectnanomaterials
dc.subjectnanoanyagok
dc.subjectsimulation
dc.subjectszimuláció
dc.subject.disciplineFizikai tudományokhu
dc.subject.sciencefieldTermészettudományokhu
dc.titlePhase separation in nanomaterials - development of models and simulation techniqueshu_HU
dc.title.translatedFázisszeparáció nanoanyagokban - modellek és szimulációs módszerek fejlesztésehu_HU
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