## 6 Conclusions  
This paper presents a comprehensive and systematic review of BJ 3D printing technology for SiC powders, with an in-depth exploration of the research status, challenges, and future trends in the preparation and applications of high-performance SiC-based components. BJ 3D printing technology has been successfully applied in the rapid prototyping of SiC powders, with small-scale forming equipment currently in operation. At the specialized equipment level, advanced devices such as piezoelectric printheads provide robust support for high-precision printing of SiC components. Regarding processing technology, significant progress has been made in optimizing key aspects, including SiC powder preparation, binder selection, and curing and sintering processes, as well as complete workflow improvements encompassing pre-processing, printing, and post-processing. The preparation of spherical powders through ball milling and spray drying techniques has effectively improved powder flowability. The use of multimodal powders enhances powder bed density, while optimization of printing parameters has led to noticeable improvements in printing quality. Quality control during green body formation and post-processing is crucial for manufacturing high-quality SiC components. During green body formation, powder particle size and shape must be optimized by preparing powders with appropriate particle sizes to improve printing resolution. The use of spherical powders or nanoparticle flow agents enhances both flowability and packing density. Additionally, binder parameters such as viscosity and surface tension must be controlled to prevent satellite droplets and nozzle clogging, minimize powder splattering, and appropriately adjust saturation levels to avoid layer shifting and dimensional errors. For printing parameters, optimizing roller rotation direction, speed, and lateral movement speed is essential for ensuring powder bed quality. Selecting appropriate powder layer thickness and particle size can suppress the stair-stepping effect, thereby improving precision. During post-processing, continuous optimization of post-treatment processes is required to achieve final part densification, such as reducing residual liquid silicon in LSI and minimizing internal cracks after PIP. Finally, employing various inspection technologies can promptly identify and resolve issues, providing data support for subsequent process optimization. Current challenges in SiC powder 3D printing are as follows. In process research, the complex physicochemical properties of SiC powder and unclear interaction mechanisms with binders make green body formation difficult to control and complete densification of final SiC components hard to achieve. Cost-wise, high R&D expenses limit optimization and practical application of green body formation and densification post-processing, while acquisition costs for high-quality specialized equipment and materials remain substantial. Balancing quality improvement with efficiency presents another major challenge--for instance, reducing powder layer thickness improves precision but decreases efficiency during green body formation, while combining CVI, PIP, and CVD in post-processing achieves extremely high densification but significantly extends processing time. Additionally, limitations exist in testing technologies; although nondestructive testing is crucial for inspecting SiC components, it is constrained by inspectable part size and detection efficiency, which in turn are affected by part size and resolution.