This study focuses on a two-stage spark plasma sintering of TaC and/or carbon nanotubes (CNTs) reinforced SiC ceramic composites. The influence of reinforcements of TaC and CNTs, as well as sintering parameters, such as pressure, heating rate, and temperature, is investigated on the densification behavior and mechanical properties of the TaC–CNTs–SiC system. The results showed that the addition of CNTs increased the densification of SiC from 86% to 99.5% while still maintaining submicron grain size under the sintering parameters of 133℃/min, 1800℃, and 90 MPa pressure. TaC additives did not favor the densification of CNT–SiC ceramics but increased the nano hardness of the composites.
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