ZrB 2 –LaB 6 powder was obtained by reactive synthesis using ZrO 2 , La 2 O 3 , B 4 C, and carbon powders. Then ZrB 2 –20 vol% SiC–10 vol% LaB 6 (ZSL) ceramics were prepared from commercially available SiC and the synthesized ZrB 2 –LaB 6 powder via hot pressing at 2000°C. The phase composition, microstructure, and mechanical properties were characterized. Results showed that both LaB 6 and SiC were uniformly distributed in the ZrB 2 matrix. The hardness and bending strength of ZSL were 17.06±0.52 GPa and 505.8±17.9 MPa, respectively. Fracture toughness was 5.7±0.39 MPa·m 1/2 , which is significantly higher than that reported for ZrB 2 –20 vol% SiC ceramics, due to enhanced crack deflection and crack bridging near SiC particles.
No takes yet. Share an insight, caveat, or question.
Spring et al. (2008) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: