Lobach K. Ceramic materials based on silicon carbide for nuclear power

10. Object of research. The process of obtaining a nonporous structure of SiC-ceramics, a complex of physical and mechanical properties of SiC and SiC with additives (B, C, Si and Cr). Purpose of research. To solve the tasks a complex of experimental studies was used. Samples were obtained by the HSHP method. Phase composition study of the initial materials and the obtained samples was carried out using analytical methods - 3D-tomography (DXR-HD), X-ray diffraction analysis (DRON-4-07), differential thermal analysis (TU INSTRUMENTS SDT Q600) and infrared spectroscopy (X- 29). Microstructural studies of samples and elemental analysis (EDX) were carried out by scanning electron microscopy (SEM), Zeiss EVO 40, JSM-7001F. Physical-mechanical properties were determined by the indention method (FM-800, PMT-3). The irradiation of the samples was carried out by the brake radiation of γ-quants, which was obtained on a linear accelerator of electrons (LPE-10). Corrosion tests under conditions imitating the internal medium of the WWER-1000 water-water reactor were carried out in the autoclave. The next methods were used in dissertation work: density measurements, 3D-tomography, X-ray diffraction analysis, IR spectrometry, scanning electron microscopy, energy distribution X-ray spectroscopy and the Vickers hardness tests. The practical results of this work are intended for nuclear power and consist in experimental data of Cr influence on physical and mechanical properties, corrosion and radiation resistance of SiC for production of SiC/SiC composites. The possibility of using SiC(Cr) ceramics as a container material for storing and geological disposal of radioactive waste from Ukrainian nuclear power plants is also substantiated. The degree of implementation is proved by the act of implementing into the curriculum of V.N. Karazin Kharkiv National University and international project "ConCorD" (Container Corrosion under Disposal Conditions) as part of the EU program to handle radioactive waste EURAD, 2021 - 2024 (Project Number 847593). Scientific results of the work can be used in the following enterprises and high schools: National Nuclear Energy Generating Company of Ukraine “Energoatom”, Association “Radon”, design department “South”, NTU “Igor Sikorsky Kyiv Polytechnic Institute”, State University “Odessa Polytechnic”, Oles Honchar Dnipro National University and NTU “Kharkiv Polytechnic Institute”.