Experimental investigations and thermodynamic calculations of the structural and phase composition in the Ti–Si–C system
| Autor: | I. I. Gorbachev, M. N. Kachenyuk, O. V. Somov, A. Yu. Pasynkov, Vladimir V. Popov |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Titanium carbide Materials science Silicon Metals and Alloys Analytical chemistry Sintering chemistry.chemical_element 02 engineering and technology Atmospheric temperature range 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films chemistry.chemical_compound chemistry Mechanics of Materials Phase (matter) 0103 physical sciences Titanium disilicide 0210 nano-technology CALPHAD Phase diagram |
| Zdroj: | Russian Journal of Non-Ferrous Metals. 58:552-559 |
| ISSN: | 1934-970X 1067-8212 |
| Popis: | Thermodynamic calculations of the structural-phase equilibrium in the Ti–Si–C system at 1100–1400°C are performed using the CALPHAD method. Calculated phase diagrams of this system are presented. It is established that 100% of the Ti3SiC2 phase is formed with the stoichiometric component ratio. With the deviation of the carbon or silicon content, titanium carbide, titanium disilicide, or silicon carbide appear in the system. The temperature almost does not affect the phase composition in the studied temperature range. The calculated data are compared with the experimental determination of the phase composition of the samples of the mentioned system after the spark-plasma sintering of the mechanically activated powder composition. In practice, the process temperature and duration of high-temperature holding substantially affect the phase composition of the final product, which is associated with the limited rate of solid-phase reactions during the synthesis of compounds. The samples have a grain size of 1–5 μm and hardness of 4–15 GPa, depending the phase composition. |
| Databáze: | OpenAIRE |
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