Mechanical properties of Al2O3 and Al2O3/Al interpenetrated functional gradient structures by 3D printing and melt infiltration

In this paper, Al 2 O 3 functional gradient structures (FGS) were prepared by digital light processing-based 3D printing , and Al 2 O 3 /Al interpenetrated FGS was subsequently obtained by melt infiltrating. The microstructure of Al 2 O 3 FGS and Al 2 O 3 /Al interpenetrated FGS was studied. And the mechanical properties of Al 2 O 3 FGS and Al 2 O 3 /Al interpenetrated FGS under quasi-static compression loading were investigated in detail. Compressive strength , Young’s modulus, and energy absorption of Al 2 O 3 FGS and Al 2 O 3 /Al interpenetrated FGS were experimental tested, compared, and discussed. The failure behavior of Al 2 O 3 FGS and Al 2 O 3 /Al interpenetrated FGS was analyzed by experiments and FEA . This study provides a novel approach for the fabrication of ceramic FGS and ceramic/metal interpenetrated FGS with high mechanical performance.