With the improvement of aero-engine performance, the preparation of hollow blades of single-crystal superalloys with complex inner cavity cooling structures is becoming increasingly urgent. The ceramic core is the key intermediate part of the preparation and has attracted wide attention. To meet this challenge, new technologies that can make up for the defects of long periods and high costs of fabricating complex structural cores by traditional hot injection technology are needed. Vat photopolymerization 3D printing ceramic technology has been applied to the core field to realize the rapid preparation of complex structural cores. However, the industrial application of this technology still needs further research and improvement. Herein, ceramic cores were prepared using traditional hot injection and vat photopolymerization 3D printing techniques using fused silica, nano-ZrO₂, and Al₂O₃ powders as starting materials. The 3D printed ceramic core has a typical layered structure with a small pore size and low porosity. Because of the layered structure, the pore area is larger than that of the hot injection ceramic core, the leaching performance has little effect (0.0277 g/min for 3D printing cores, 0.298 g/min for hot injection cores). In the X and Y directions, the sintering shrinkage is low (2.7%), but in the Z direction, the shrinkage is large (4.7%). The fracture occurs when the inner layer crack expands and connects with the interlayer crack, forming a stepped fracture in the 3D-printed cores. The bending strength of the 3D printed core at high temperature (1500 °C) is 17.3 MPa. These analyses show that the performance of vat photopolymerization 3D-printed ceramic cores can meet the casting requirements of single crystal superalloy blades, which is a potential technology for the preparation of complex structure ceramic cores. The research mode of 3D printing core technology based on the traditional hot injection process provides an effective new idea for promoting the industrial application of 3D printing core technology.

随着航空发动机性能的提高，具有复杂内腔冷却结构的单晶高温合金空心叶片的制备日益紧迫。陶瓷芯是制备的关键中间部分，受到广泛关注。为应对这一挑战，需要新技术来弥补传统热注技术制造复杂结构芯的周期长、成本高的缺陷。大桶光聚合3D打印陶瓷技术已应用于核心领域，实现了复杂结构核心的快速制备。但该技术的工业应用仍需进一步研究和完善。在此处，₂、Al ₂ O ₃粉末作为起始原料。3D打印的陶瓷芯具有典型的层状结构，孔径小，孔隙率低。由于层状结构，孔隙面积大于热注陶瓷芯，浸出性能影响不大（3D打印芯为0.0277 g/min，热注芯为0.298 g/min）。在X和Y方向，烧结收缩率较低（2.7%），但在Z方向，收缩较大（4.7%）。当内层裂纹扩展并与层间裂纹连接时，就会发生断裂，在 3D 打印的芯中形成阶梯式断裂。3D打印芯在高温（1500°C）下的弯曲强度为17.3 MPa。这些分析表明，大桶光聚合3D打印陶瓷芯的性能可以满足单晶高温合金叶片的铸造要求，是制备复杂结构陶瓷芯的潜在技术。基于传统热注塑工艺的3D打印核心技术研究模式为推动3D打印核心技术的产业化应用提供了有效的新思路。