Silicon nitride combined with silicon carbide micro powder is a commonly used high-performance ceramic material that exhibits excellent properties such as high temperature resistance, corrosion resistance, high strength, and high hardness. It is widely used in mining, chemical, electronics, and other fields. In the injection molding process of silicon nitride combined with silicon carbide powder, the role of silicon powder is to provide volume for the material and improve its microstructure, making it denser. Grouting molding can further improve the density and strength of the material.