Fabrication, Microstructural, and Mechanical Behavior of SiC Composite with Insitu Formation of BN and Si3N4

Dealing with high-temperature properties and brittleness is always one of the hot topics in field ceramic materials. Extensive research has been carried out for it Si3N4-SiC composites are most promising composites. In this study, impact Si3N4 BN reinforcement on microstructure physio-mechanical SiC-based were explored. Two sets composites, including BN-Si3N4-SiC aided Al2O3, fabricated using nitridation Si B2O3 at 1450 °C. The mechanical properties, microstructure, phase transformation, densification, porosity depicted discussed. X-ray diffraction patterns revealed insitu formation (both α β phases) final composite. specimen 10% possessed superior flexural strength (284.4 MPa) excellent hardness (23.4 GPa). incorporation found to enhance especially while overcoming shortcomings reaction-bonded Si3N4-SiC. corresponding densification strengthening mechanism explained paper.