## 4 Practical Applications and Case Studies  
This section primarily surveys and analyzes the major forming equipment and application cases in the field of SiC powder 3D printing with droplet jetting technology from several well-known companies. The companies involved include Oak Ridge National Laboratory, the CONCR3 DE and WZR collaboration team, Schunk Technical Ceramics, Saint-Gobain, SGL Carbon, Terrani, Farsoon Technologies, BLT, and Aurora Innovation. Each piece of equipment from these companies has distinct characteristics in SiC 3D printing, with some focusing on material property development and others on breakthroughs in equipment technology, providing diverse solutions for the advancement of SiC powder 3D printing. To meet the demand for high-precision, complex SiC components, companies are actively researching the preparation and processing of SiC. Oak Ridge National Laboratory [186] has successfully combined binder jet printing with chemical vapor infiltration (CVI) to produce high-purity, fully crystallized SiC components suitable for applications requiring high thermal conductivity and mechanical strength with complex geometries. The CONCR3 DE and WZR collaboration team [187] has studied water-based binders and particle-filled binders to significantly enhance the density and mechanical properties of SiC materials, expanding their potential applications across various industrial sectors. ExOne, in collaboration with Saint-Gobain, has made breakthroughs in SiC BJ 3D printing technology, supporting the large-scale production of complex, high-performance components and promoting technological advancement in the field [188,189]. Schunk Technical Ceramics' IntrinSiC process has shown excellent performance in aerospace, providing lightweight components for high-temperature, high-strength applications. Saint-Gobain's ExOne BJ systems have made significant progress in printing precision and material compatibility, supporting the application of SiC in high-temperature, corrosion-resistant equipment [190]. SGL Carbon focuses on the development of SiC components for high-temperature and corrosive environments, particularly in metallurgy applications [191]. Terrani specializes in nuclear industry applications, developing SiC fuel components for high-temperature and radiation environments that meet the strict requirements of nuclear reactors. Farsoon Technologies, BLT, and Aurora Innovation [192] continue to push the optimization of droplet jetting technology. Farsoon's high-precision droplet jetting system has increased the printing speed and accuracy of SiC components, further advancing the application of ceramic materials. BLT's SiC 3D printer has shown application potential in aerospace, particularly for manufacturing high-temperature structural components. Aurora Innovation has optimized material uniformity and printing precision, reducing material waste and offering new insights for the sustainable development of 3D printing technology. Through these technological advancements, we foresee a broader application of SiC powder 3D printing in the future, especially in the aerospace, defense, and nuclear energy sectors. SiC materials, with their excellent thermal stability, mechanical strength, and radiation resistance, will play a critical role in the manufacturing of high-performance components. Additionally, with the continuous optimization of droplet jetting technology, SiC 3D printing will see improved production efficiency and forming quality, driving the technology toward large-scale, customized production. In the future, SiC powder 3D printing technology will continue to make breakthroughs in enhancing forming precision, reducing material waste, and expanding material adaptability, further promoting its application across multiple high-end fields. Based on the current literature and industrial survey results presented in this manuscript, reports on the real-world commercial applications of BJ 3D-printed SiC components remain extremely limited.