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

Montón, Alejandro ; Maury, Francis ; Chevallier, Geoffroy ; Estournès, Claude ; Ferrato, Marc ; Grossin, David

Resumen: 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.

Idioma: Inglés

DOI: 10.1016/j.jeurceramsoc.2021.07.036

Año: 2021

Publicado en: Journal of the European Ceramic Society 41, 15 (2021), 7543-7551
ISSN: 0955-2219

Factor impacto JCR: 6.364 (2021)

Categ. JCR: MATERIALS SCIENCE, CERAMICS rank: 2 / 29 = 0.069 (2021) - Q1 - T1

Factor impacto CITESCORE: 8.9 - Materials Science (Q1)

Factor impacto SCIMAGO: 1.107 - Materials Chemistry (Q1) - Ceramics and Composites (Q1)

Tipo y forma: Artículo (Versión definitiva)