光固化增材制造精铸用陶瓷过滤网的高固含量浆料设计及性能研究OA

High-performance ceramic filters are crucial for the precision casting of superalloys used in aero-engines and gas turbines.However,traditional fabrication processes face limitations in achieving complex and precise porous structures.Stereolithography-based additive manufacturing offers a novel technological pathway for producing ceramic filters with high precision and customizability.In this method,the solid loading of the ceramic slurry is the core factor determining the sintered body's density,dimensional stability,and final mechanical properties.Therefore,this study systematically investigates the synergistic regulation mechanism of two key material factors—the resin system and particle gradation—on the performance of high-solid-loading slurries.The results indicate that adjusting the proportion of low-viscosity cationic resin(TMPO)can effectively reduce the system viscosity,thereby providing conditions for introducing a higher proportion of ceramic solid phases.Simultaneously,optimizing the gradation of coarse and fine particles(500 nm and 1 μm)enables fine particles to fill the gaps between coarse particles,significantly improving particle packing density and solid loading,which is a key approach to achieving high-solid-loading slurries.Based on the above mechanisms,through the synergistic optimization of material particle size distribution and printing parameters,a slurry with 55vol.％solid loading was successfully prepared.This ultimately yielded a ceramic filter mesh with high-precision pore structure(bulk density of 3.61 g/cm3,open porosity of 1.35％)and excellent mechanical properties(room-temperature and high-temperature flexural strengths of 263.67 MPa and 17.68 MPa,respectively).This research designs a high-solid-loading,high-performance ceramic slurry for stereolithography-based additive manufacturing of ceramic filter meshes,enabling the fabrication of ceramic filters with controllable complex pore structures.