Microstructure and mechanical properties of ZrB_2-SiC-BN composites fabricated by reactive hot pressing and reactive spark plasma sintering

摘要

ZrB_2-SiC-BN composites were fabricated from a powder mixture of ZrH_2, Si_3N_4 and B_4C via reactive hot pressing (RHP) and reactive spark plasma sintering (R-SPS). The phase composition, density, microstructure and mechanical properties of the final products were studied and compared. The sample fabricated by the R-SPS process showed higher density, flexural strength and frac ture toughness and had a more homogeneous microstructure compared to the one fabricated by the RHP process.