| The synthesis route, microstructure, mechanical properties and oxidation behavior of TaB2-SiC composite fabricated by reactive hot pressing using Ta/B4C/Si as precursors were investigated. The reaction sequence of TaB2-SiC composite was studied thorough series of heat treatment ranging from 1000 to 1900 œC in Ar. Based on the reaction sequence analysis, TaB2-SiC composite was reactively hot pressed at 1900 œC. Its elastic modulus, flexural strength, Vickers hardness and fracture toughness were 487 GPa, 542 MPa, 17.9 GPa and 3.63 MPam1/2, respectively. The oxidation behavior of the TaB2-SiC composites at 1500 œC in air exhibited passive oxidation with parabolic kinetic. |
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