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Densification of surface-modified silicon carbide powder by spark-plasma-sintering

Montón, Alejandro and Maury, Francis and Chevallier, Geoffroy and Estournès, Claude and Ferrato, Marc and Grossin, David Densification of surface-modified silicon carbide powder by spark-plasma-sintering. (2021) Journal of the European Ceramic Society, 41 (15). 7543-7551. ISSN 0955-2219

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Official URL: https://doi.org/10.1016/j.jeurceramsoc.2021.07.036

Abstract

SiC was densified by spark plasma sintering (SPS) and the effects of surface modification of the powder particles on its sintering behavior were investigated. The pressure and temperature conditions were set to 50 MPa and 2200 °C, respectively. Specific SPS experiments at a lower temperature (i.e. 1600 °C) was performed to analyze the efficiency of the sintering and the early stage of the densification in softer conditions. The surface functionalization was carried out by grafting a thin molecular layer of a preceramic precursor on the grain surface of SiC particles, which acts as a sintering additive without producing contamination by heteroatoms since, in addition to hydrogen, it contained only Si and C in the same ratio 1:1 as silicon carbide. One of the advantages of this surface functionalization is that it reduces the temperature at which the sintering process begins and therefore it facilitates and increases the densification of the final SiC parts.

Item Type:Article
HAL Id:hal-03416172
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Boostec (FRANCE)
Laboratory name:
Funders:
European Union’s Horizon 2020
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Deposited On:05 Nov 2021 09:07

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