The document discusses the fabrication of silicon carbide/silicon carbide fibers (SiC/SiCf) composites using vacuum infiltration and hot pressing methods, highlighting their advantages such as high specific strength, thermal conductivity, and low induced radioactivity. It details the process of achieving high density and structural strength through various preparation methods, materials, and the effects of additives on performance. The results indicate a achieved density of 3.161 g/cm3 and a flexural strength of 230 MPa, with observations of phase changes in the composite after processing.