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Liquid-phase assisted spark-plasma sintering of SiC nanoceramics and their nanocomposites with carbon nanotubes
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för material- och miljökemi (MMK).
Vise andre og tillknytning
Rekke forfattare: 52017 (engelsk)Inngår i: Journal of the European Ceramic Society, ISSN 0955-2219, E-ISSN 1873-619X, Vol. 37, nr 5, s. 1929-1936Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The appropriate conditions for liquid-phase assisted spark-plasma sintering (SPS) were identified for the fabrication of both SiC nanoceramics and their nanocomposites with carbon nanotubes (CNTs). A parametric study of the nanoceramics and nanocomposites with a given type of CNTs showed that the SPS temperature (as measured by the radial optical pyrometer) optimizing their densification, nanograin size, and mechanical properties is 1700 degrees C (soaking for a few minutes), below which there is incomplete densification, and above which there is obvious grain growth with no benefit in hardness or toughness in the case of the nanoceramics, and prejudicial to both properties in the case of the nanocomposites due to the CNT degradation. It was also shown that the nanocomposites have smaller nanograins than their nanoceramic counterparts, and are softer but tougher. Extension to nanocomposites with different types of CNTs confirmed these trends, and showed that the CNT features do not condition the densification, microstructure or mechanical properties of these nanocomposites.

sted, utgiver, år, opplag, sider
2017. Vol. 37, nr 5, s. 1929-1936
Emneord [en]
SiC, CNTs, Spark plasma sintering, Nanoceramics and nanocomposites, Colloidal processing
HSV kategori
Identifikatorer
URN: urn:nbn:se:su:diva-142368DOI: 10.1016/j.jeurceramsoc.2016.12.050ISI: 000395953600006OAI: oai:DiVA.org:su-142368DiVA, id: diva2:1093260
Tilgjengelig fra: 2017-05-05 Laget: 2017-05-05 Sist oppdatert: 2017-05-05bibliografisk kontrollert

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