Preparation and Characterization of SiC/Al₂O₃ Composites

Abstract

The present research was focus on various SiC content adding to Al2O3 matrix to improve the mechanical properties of Al2O3 ceramic. The mechanical properties of the composites were characterized by XRD and SEM. The effect of SiC content on the mechanical properties of SiC/Al2O3 composites was studied. The results show that SiC/Al2O3 composites have the best comprehensive mechanical properties when the SiC content is 5vol.%. With the increase of SiC content, agglomeration phenomenon was obvious, pores at grain boundaries increased, fracture mode changed from transgranular fracture to intergranular fracture, and mechanical properties of the material got worse.