Fabrication and characterization of sintered TiC-SiC composites |
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Authors: | J Cabrero F AudubertR Pailler |
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Affiliation: | a LCTS, University of Bordeaux, 3 Allé de la Boétie, 33600 Pessac, France b CEA/DEN/DEC/SPUA, Cadarache, 13108 Saint Paul lez Durance, France |
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Abstract: | Some TiC-SiC composites with different SiC volume contents (0, 10, 25 and 50%) are prepared by spark plasma sintering (SPS). The relationship between density, grain growth and temperature is studied in order to fabricate dense and nano-sized TiC-SiC composites. A sintering by SPS at 1800 °C during 5 min allowed to form TiC-SiC composites with relative density above 95% and an homogeneous distribution of TiC (grain size from 270 to 900 μm) and nano-sized SiC. With the increasing of SiC volume contents, Vickers hardness and fracture toughness are improved; thermal conductivity at room temperature is increased whereas at high temperature it is reduced. In future studies, those materials will be irradiated to characterize monolithic TiC and TiC-SiC composites behaviour under irradiation. |
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Keywords: | Spark plasma sintering SiC TiC Thermal conductivity Nuclear applications |
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