Abstract
Tantalum carbide with a TaC 0.9 composition was sintered to 96% relative density by spark plasma sintering at 1400 °C for 5 min, using commercial micrometric Ta and TaC powders as the starting materials. This achievement was dependent on the delicate rearrangement of the heating process which limits evaporation–condensation and promotes the mass transportation in association with 0.9TaC + Ta = TaC 0.9 reaction. The dense TaC 0.9 ceramic had a uniform microstructure composed of equiaxed grains, and showed flexure strength up to ∼498 MPa.
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