As the internal cooling structure of aero-engine hollow turbine blades becomes more complicated, the corresponding ceramic core structures have also become more complex. This has made the vat photopolymerization (VPP) 3D printing technology a key research direction in the field of ceramic core manufacturing. Therefore, after investigating the influence of varying solid loadings on the performance and forming accuracy of ceramic cores, this study further introduces the curing depth-to-overcuring width control factor () and systematically explores the multi-factor optimisation strategy of UV absorber (2,2'-(3,3'-dichlorobiphenyl-4,4'-diyl)di(E)diazene-2,1-diylbisN-(2-methylphenyl)-3-oxobutanamide, PY14) content and forming parameters on forming accuracy. The results show that when the solid loading of the ceramic slurry reaches 70 vol.%, the sintering shrinkage rate of the ceramic core is 2.91%, and the flexural strength is 14.24 MPa, while the increase in the over-curing width can be as high as 106.82%; when the addition amount of PY14 is 2.5 wt.‰ and the slice thickness is set at 100 μm, the fluctuation of reaches the minimum value, and the prepared ceramic core has high forming accuracy and excellent performance. The research results of this paper are helpful to promote the wide application of VPP 3D printing technology in the field of ceramic cores.
Wang et al. (Tue,) studied this question.