Effects of Material Systems and Porosity Gradient-Enhanced Structures on Properties of 3D Printed Al2O3 Porous Ceramics
ZOU Bin1,2,3,4, QUAN Tao1,2,3,4, ZHANG Guangxu1,2,3,4, WANG Xinfeng1,2,3,4, UN Hewu1,2,3,4, MA Xianhua1,2,3,4
1. School of Mechanical Engineering, Shandong University, Jinan 250061, China;
2. Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Shandong University, inistry of Education, Jinan 250061, China;
3. National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, inan 250061, China;
4. Additive Manufacturing Research Center, Shandong University, Jinan 250061, China
To investigate the effects of both water-based and oil-based material systems, as well as porosity gradient-enhanced (PGE) structure on the performance of 3D printed Al2O3 porous ceramics, various ceramic parts with different hole densities were fabricated using stereo lithography apparatus (SLA) 3D printing technology. The shrinkage rate, compressive strength, and microstructure of the printed parts in two material systems were comparatively analyzed. Additionally, the porosity, bending performance, and thermal shock resistance of the parts before and after PGE optimization were discussed in detail. The results indicated that the shrinkage and compressive strength of the parts formed by oil-based materials significantly surpassed those of water-based materials, with particles exhibiting a denser microscopic appearance. Nevertheless, the particles of parts formed by water-based materials were in spherical shape, separating from each other. Furthermore, the adoption of PGE structure effectively avoided the occurrence of regional fracture phenomenon in the parts. The PGE parts with different hole densities all achieved a 12%–14% increase in bending strength, as well as a 14%–18% improvement in thermal shock strength. In conclusion, the proper use of oil-based Al2O3 ceramic paste along with the rational design of PGE structures are effective approaches to improving the performance of Al2O3 porous ceramics, rendering its adaptation to the increasingly complex demands of industrial applications.
邹斌，全涛，张广旭，王鑫锋，孙赫武，马贤骅. 材料体系和孔隙率梯度增强结构对3D打印氧化铝多孔陶瓷的性能影响[J]. 航空制造技术, 2025, 68(3): 22-29.
ZOU Bin, QUAN Tao, ZHANG Guangxu, WANG Xinfeng, UN Hewu, MA Xianhua. Effects of Material Systems and Porosity Gradient-Enhanced Structures on Properties of 3D Printed Al2O3 Porous Ceramics[J]. Aeronautical Manufacturing Technology, 2025, 68(3): 22-29.
2025, 
