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Information × Registration Number 0219U102063, 0119U101787 , R & D reports Title Towards understanding equilibrium phase diagrams at nanoscale popup.stage_title Head Bogatyrenko Sergii I., Кандидат фізико-математичних наук Registration Date 16-12-2019 Organization V.N. Karazin Kharkiv National University popup.description2  The aim of the project is to establish new physical regularities of the solid-state interphase interaction in nanosized binary systems, namely, to study the evolution of an equilibrium phase diagram with a decrease in the systems characteristic size. Object of research - solid-state solubility of components in binary films, morphological and phase structure of layered films, evolution of a phase diagram. The subject of research - two-layer Au-Ni films with a mass thickness of 2-10 nm prepared by condensation of components from a molecular beam formed during the thermal evaporation of components from independent sources in a vacuum. The study of the structure, morphology and chemical elements distribution in binary nanosystems at the atomic level was fulfilled with the modern equipment (FEI Titan3 G2 60-300 with Cs-correction of spherical aberration and ChemiSTEMTM system) and electron microscopy methods including the in situ ones (HAADF STEM, EDX). The kinetics of solid solution formation in layered films was investigated by heating the samples directly in a translucent electron microscope (PEM-125K). In summary, new quantitative data on size dependence of solid-state mutual solubility of the components in the Au-Ni binary were rigorously acquainted. For the first time, based on these results a solid-phase region of the system’s equilibrium phase diagram for the samples of (2-5) nm. For the first time, a new size effect, that is equilibrium phase diagram transformation to a simpler type at the decreasing size, has been experimentally revealed. The appropriate critical size of this transform has been painstakingly determined. The main results of the work were obtained for the first time. Their rele-vance is conditioned by the need of understanding the physics of processes in low-dimensional systems and the ubiquitous use of nanoscaled objects in modern technologies. Obtained results are of interest and can be used by scientific institutions involved in similar resea Product Description popup.authors Bogatyrenko Sergii I. popup.nrat_date 2020-04-02 Close