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The synthesis and consolidation in one processing step of single phase tantalum diboride by Spark Plasma Sintering (SPS) is proposed. TaB 2 formation from Ta and B elemental powders takes place at about 800°C through a solid-state combustion reaction while product densification requires higher temperatures. Consolidation is significantly improved (~96% density) when increasing the applied...
The TaB 2 –27.9vol% SiC composite was synthesized by self-propagating high-temperature synthesis starting from mechanically activated Ta, B 4 C and Si reactants. The obtained powders were spark plasma sintered at 1800°C and 20MPa for 30min total time, thus obtaining a 96% dense product. The latter one was characterized in terms of microstructure, hardness, fracture toughness, and oxidation...
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