Preparation and Mechanical Properties of Ceramic/Polyurea Composite Structures Based on 3D Printed Al2O3 Gradient Lattice Structure
The hard/soft combined multiphase composite structures in nature are considered for the de-sign of new load-bearing impact-resistant structures.An Al2O3 ceramic lattice with gradient structure was designed and prepared by light-cured 3D printing technology,and then polyurea was infiltrated into the Al2O3 gradient lattice to obtain the ceramic/polyurea composite structure.The mechanical properties of the Al2O3 gradient lattice and the ceramic/polyurea composite structure were tested and character-ized.It was found that the compressive strength and energy absorption of two Al2O3 ceramic lattices, FGC-0 and FGC-30,were 11.03 MPa,6.7 MPa and 0.075 MJ/m3 ,0.0338 MJ/m3 ,respectively.Mean-while,the compressive strength and energy absorption of two gradient composite structures,FGCS-0 and FGCS-30,were 12.123 MPa,17.479 MPa and 0.036068 MJ/m3 ,0.53643 MJ/m3 ,respectively.Com-pared with the corresponding Al2O3 ceramic lattice,the compressive strength and energy absorption of the gradient composite structures were improved by 160.9% and 1487.1%,respectively.The study indi-cates that the ceramic/polyurea composite structure based on light-cured 3D printed gradient lattice has improved mechanical properties and its innovative applications will be used in new load-bearing impact resistant structures.
3D printinggradient latticeceramic/polyurea composite structuremechanical properties