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Registration Number

0220U102218, 0116U005362 , R & D reports

Title

Development of scientific bases of application of structurally complex functional materials and media in alternative energy and resource saving.

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Head

Tkachenko Victor I., Доктор фізико-математичних наук

Registration Date

11-03-2020

Organization

National Science Center "Kharkiv Institute of Physics and Technology"

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The research goal is the obtainment of novel theoretical and experimental results considered as a fundamental physical basis of environmentally friendly, energy efficient and resource saving methods of production of structurally complex functional materials for alternative energy, prediction and optimization of their properties and radiation resistance, and their involvement in innovative energy and resources saving technologies. Oxidation, corrosion and radiation forming of nuclear graphites for high temperature GenIV reactors were studied by multiscale computer modeling methods. The oxidant gas dynamics effect on the nuclear graphite oxidation rate under electron irradiation was revealed. A new fractal model of porous nuclear graphite of various grade was built and allowed simulations of its oxidation and corrosion kinetics using the kinetic Monte Carlo method. Experimental data on the dimensional changes of nuclear graphite under reactor irradiation were phenomenologically described with the new kinetic model based on the virtual media phase transitions theory. Dissipative and selective properties of the RF section of the THz gyrotron for biophysics and medicine were investigated; this resulted in recommendations for a resonator design optimization by its longitudinal corrugation, application of ceramic coatings and functional metamaterials. The application prospects of high spin 1 and 3/2 magnetics were studied theoretically in a Hamiltonian approach, both phase equilibrium states and non-equilibrium processes were described in terms of dynamics equations, collective excitation spectra and relaxation phenomena. By means of the X-ray diffraction and high resolution electron microscopy, it was first proved that the thermal-vacuum (evacuation plus rapid heating) device is capable to obtain the nano-dispersed carbon (nanographite) with altered structure, improved dispersion and the presence of multiwalled nanotubes and fullerene-like formations sized to 10-40 nm.

Product Description

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2020-04-02