Microstructure evolution and mechanical properties of bioinspired web-liked (TiB + TiC+Ti3Si)/TC4 composites

In this study, bioinspired web-liked multiphase (TiB + TiC+Ti3Si)/TC4 composites were successfully constructed by employing the boron-modified polysilazane polymer as a source of B/C/Si. The bioinspired architecture consisted of long TiB nanowires with ultra-high aspect ratios (up to 48.2) acting as 'web', and hybrid spheroidal TiC and rod-like Ti3Si particles serving as 'nodes'. The multiphase reinforcements were grown through the unique SLS (solid-liquid-solid) mechanism based on multiple liquid phases at the core-shell TC4@BmPSZ interface. The enhanced strength of bioinspired web-liked composites was attributed to the synergistic load transfer of hybrid reinforcements. Notably, the flexural strength reached up to 1863 MPa with a high crack-initiation toughness (KIc) of 17.8 MPa & sdot;m1/2. The insights gained from this study provided a promising design approach for developing of high-performance TMCs with high reinforcement content, utilizing polymer instead of traditional ceramic powder.

Automated summary

In this study, bioinspired web-liked multiphase composites were successfully constructed using boron-modified polysilazane polymer. The composites consisted of long TiB nanowires as 'web' and hybrid TiC and Ti3Si particles as 'nodes'. The enhanced strength of these composites was attributed to the synergistic load transfer of the hybrid reinforcements. This study provides a promising design approach for developing high-performance composites with high reinforcement content, utilizing polymer instead of traditional ceramic powder.