Research progress in additive manufacturing technology of continuous fiber reinforced SiC composites

Continuous fiber-reinforced SiC composites have shown significant potential in aerospace applications due to their lightweight, high-temperature resistance, and corrosion tolerance. The introduction of continuous fibers improves the brittleness of the ceramic matrix, while additive manufacturing (AM) provides new opportunities for designing and fabricating complex components. Research on additive manufacturing of continuous fiber-reinforced SiC composites is still in its early stage, making a systematic review of recent progress highly valuable. This work summarizes the latest advances in three representative AM techniques: fused deposition modeling (FDM), direct ink writing (DIW), and automated fiber placement (AFP), with a comparative analysis of domestic and international studies. The results indicate that FDM using continuous fiber filaments achieves high forming accuracy but has an upper limit on fiber volume fraction; DIW suffers from fiber aggregation and insufficient interfacial protection due to in-situ infiltration; AFP with continuous fiber sheets offers high fiber content and fracture toughness, though infiltration remains incomplete. Regarding fiber reinforcement, future research should focus on high-performance multi-series fibers, specifically targeting fiber protection and interfacial regulation. In terms of defect control, synergistic optimization of printing strategies and ceramic process parameters will be employed to achieve high forming precision, ultimately enabling the additive manufacturing of high-performance SiC composite components.