Influence of Adding P-SiC on the Performance of α-SiC Pressureless Sintering Ceramics

摘要

The B4C and phenolic resin were used as sintering additives to study the different β-SiC (cubic silicon carbide) addition to the performance of α-SiC pressureless sintering ceramics in this paper, and the optimum sintering temperature and the best β-SiC addition amount were determined. By XRD, SEM, density testing and other tests showed that, all the β-SiC transform 6H α-SiC during the sintering process, the ceramics have a Vickers hardness of 18.04 GPa, a fracture toughness of 4.51 MPa, a density of 3.13g/cm~3 by adding 15wt% β-SiC powders.