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Total number
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0219U001975,
0118U000340
,
Processes of obtaining carbon and metal-carbon (systems Ti-А1-С) nanomaterials by methods of discharge-pulse self-propagating high-temperature synthesis
Kuskova Nataliy Ivanivna,
04-04-2019
Institute of Pulse Research and Engineering
The object of research are the physical and technical processes of metallocarbon nanomaterials' obtaining as a result of self-propagating high-temperature synthesis (SHS). Methods of investigation are electrophysical experiment, methods of X-ray diffraction analysis, electron microscopy. Experimental studies were carried out using a magnetically-semiconductor submicrosecond pulse generator to initiate the process of SHS and heat the material. Experimental research made it possible to synthesize a composite material containing 92% MAX phase of Ti2AlC and 8% Al2Ti (titanium aluminide). Analysis of the received video recording data and the results of the samples temperature measurement in the process of SHS allowed to describe the sequence of chemical combustion and synthesis reactions occurring in the Ti-Al-C system in the air. The calculation of theoretical values of thermodynamic potentials (free energy of Gibbs and enthalpy) of each reaction in mixtures with different carbon precursors were performed. Thermodynamic substantiation of chemical reactions kinetics was carried out at experimentally obtained temperatures of SHS initiation (from 930 K to 1575 K) and combustion (from 1800 K to 2400 K). It is shown that the formation of MAX-phases of Ti3AlC2 and Ti2AlC occurs at SHS-products cooling up to 1800 K. A reodynamic model has been created for mathematical description of processes of prepressing or extrusion of synthesized porous material. Model takes into account both thermodynamic and rheological parameters of synthesis in the Ti-Al-C system, the model allows to investigate theoretically the dependence of the density of the material on the compression time for different pressure values
Кускова Н.І.
Хайнацький С.О.
Христо О.І.
Челпанов Д.І.
Шведов Л.П.
Ющишина Г.М.
2020-04-02
Updated: 2025-12-08
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