Journal
MATERIALS
Volume 12, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/ma12040570
Keywords
thermoelectric materials; spark plasma sintering; mechanical alloying; silicon germanium; nanocomposite; nanostructured; FEM; modeling; simulation; field assisted sintering
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Funding
- RFBR [18-38-00371]
- Act 211 Government of the Russian Federation [02.A03.21.0011]
- Increase Competitiveness Program of NUST MISiS [K2-2017-005]
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We report a numerical study of the field assisted sintering of silicon germanium alloys by a finite element method, which takes into account contact resistances, thermal expansion and the thermoelectric effect. The distribution of electrical and thermal fields was analyzed numerically, based on the experimental data collected from spark plasma sintering (SPS) apparatus. The thermoelectric properties of Si-Ge used within the simulation were considered as the function of density and the sintering temperature. Quantitative estimation of the temperature distribution during the sintering pointed to a significant, up to 60 degrees C, temperature difference within the specimen volume for the case of the sintering temperature at 1150 degrees C.
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