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Characteristics evaluation of SiC/Si nanocomposites produced by spark plasma sintering
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Number of Authors: 42019 (English)In: Materials Science and Technology, ISSN 0267-0836, E-ISSN 1743-2847, Vol. 35, no 10, p. 1204-1211Article in journal (Refereed) Published
Abstract [en]

SiC-Si composites are widely used either as a bulk material or as a matrix for fibre reinforced ceramics. In the current research, nanocomposites of SiC-Si with different volume fractions of Si were sintered by spark plasma sintering (SPS) for the first time. The effect of Si content and different sintering parameters on relative density, microstructure, hardness and fracture toughness of the sintered materials have been investigated. The relative density increased from about 83 to 99% by increasing the sintering temperature to 1700 degrees C, sintering time to 10 min, and pressure to 70 MPa for composites containing >20 vol.-% Si. The results revealed that the full dense SiC-20 vol.-%Si composite can be obtained by SPS at 1700 degrees C, 10 min and 70 MPa. Moreover, in this condition, the hardness and toughness of the composites reached the optimum values.

Place, publisher, year, edition, pages
2019. Vol. 35, no 10, p. 1204-1211
Keywords [en]
SiC-Si nanocomposite, spark plasma sintering, density, hardness, fracture toughness
National Category
Materials Engineering Materials Chemistry
Identifiers
URN: urn:nbn:se:su:diva-170023DOI: 10.1080/02670836.2019.1618046ISI: 000469704100001OAI: oai:DiVA.org:su-170023DiVA, id: diva2:1329284
Available from: 2019-06-24 Created: 2019-06-24 Last updated: 2019-07-09Bibliographically approved

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Sajjadi, Seyed AbdolkarimJohnsson, Mats
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