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Information × Registration Number 0220U102283, 0119U100999 , R & D reports Title High energy synthesis of multifunctional nanostructured materials, based on Ti, Al, Сu and С popup.stage_title Head Sizonenko Olga M., Доктор технічних наук Registration Date 11-03-2020 Organization Institute of Impulse Processes and Technologies popup.description2  Object of studies – powder mixtures of Al – Ti and Cu – Al compositions. Methods of studies – mathematical modelling, physical experiment, registration of transient electrical processes, methods of optical microscopy, X-ray diffraction and elementary X-ray spectral microanalysis. Analysis of the processes that accompany high voltage electric discharge (HVED) treatment of Al – Ti – C and Cu – Al – C powder systems in hydrocarbon liquids is performed. It is shown that amplitude values of the pressure in compression wave, which forms during HVED treatment, are affected both by the type of discharge and the nature of liquid: in ethylene pressure amplitude is almost two times lower than in kerosene, and in case of spatial discharge it is 4 times lower if compared to the case of spark discharge. It is found that in terms of dispersion and change of phase composition, the most efficient among considered treatment regimes was the regime of HVED treatment in kerosene in conditions of increase of specific treatment energy up to 20 MJ/kg and the use of “point – plane” electrode system. This leads to at least three times dispersion of initial powder mixtures (if compared to their initial size) as well as to the synthesis of additional hardening phases (up to 20 % of TiC carbide in 85 % Ti + 15 % Al system and intermetallic compounds in 87,5 % Al + 12,5 % Cu system). A simple rheological theory of self-propagating high-temperature synthesis, in the framework of which the processes of pressing and extrusion of Ti – Al – C powder system in conditions of uniaxial pressure. It is shown, that the dependence of relative density on time can be scaled by the factor of relation between pressure and the viscosity of materials unchangeable base. Product Description popup.authors Zaichenko Andrii D. Kuskova Natalia I Lypian Yevhen V. Pasichnyk Ludmila I Prystash Mykola S. Sizonenko Olga M. Taftai Eduard I. Torpakov Andrii S. Khainatsky Sergii O Khrysto Olexandr I Shvedov Leonid P Yushchishina Ganna M popup.nrat_date 2020-04-01 Close