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Information × Registration Number 0217U000078, 0116U002969 , R & D reports Title Development of pulse technologies of production of highly wear-resistant dispersion-hardened metal matrix composite materials based on alloys of aluminum, titanium and iron popup.stage_title Head Syzonenko Olga Mukolayivna, Registration Date 17-01-2017 Organization Institute of Pulse Research and Engineering popup.description2 Theoretical analysis of conditions of synthesis of hardening phases in Al - Ti - C and Fe - Ti - C - (B) powder mixtures during high voltage electric discharge (HVED) treatment in kerosene is performed. Conditions for passage of reactions between components of Al - Ti - C and Fe - Ti - C - (B) powder mixtures and products of hydrocarbon liquid decomposition under the impact of plasma discharge channel are determined. For conditions of discharge development in studied systems it is necessary to ensure voltage on capacitors terminals no less than 50 kV, and a distance between the electrode and powder no more than 1.5 mm. Theoretical analysis of conditions of HVED treatment, which ensure increase of dispersity and initiate passage of chemical reactions, was experimentally verified. Conditions for HVED treatment of Al, Ti, Fe powders and their mixtures, which ensure change ofmean diameterof Al powder from 23 to less than 5 µm, of Ti powder - from 60 to less than 3 µm, and of Fe powder - from 60 to less than 0.7 µm, are found. Such a tendency of dispersity change is also observed for treatment of elementary powders mixtures. Optimal parameters for HVED treatment of powder mixtures of Fe - Ti - C system, which lead to synthesis of carbides, hydrides and intermetallic compounds, and in case of Fi - Ti - B4C system treatment - to additional synthesis of FeB, Fe2B, TiB2 and Ti2B borides, are determined. Dependence of phase composition change during HVED treatment of Al - Ti - C system mixtures in kerosene on specific impact energy and mass composition of initial mixture, at which synthesis of new phases - Titanium carbide TiC, intermetallic compounds AlTi3, AlTi, Al2Ti, Al3Ti, binary carbide Ti3AlC, MAX phase Ti2AlC and Lonsdaleite occurs, is determined. Novelty - TiC, TiB2 hardening additives are not mechanically added into powder mixture as additional component during powders hardening, but are instead synthesized during their HVED treatment as a result of reaction synthesis under the impact of microplasma discharges Product Description popup.authors Зайченко А.Д. Лмпян Є.В. Присташ М.С. Сизоненко О.М. Торпаков А.С. Трегуб В.А. popup.nrat_date 2020-04-02 Close