Effect of lattice structures of 3D printed preforms on compressive properties of SiC/Al-10Mg composites with interpenetrating network structure

Abstract

Abstract: The SiC preforms with three lattice structures (linear, honeycomb, grid) were fabricated using slurry extrusion 3D printing technology, and the SiC/Al-10Mg composites were prepared by combining melt infiltration technique. The compressive properties of the composites were mainly investigated. The results showed that the compressive properties of SiC/Al-10Mg composites exhibit significant anisotropy. The load-displacement curves of honeycomb structure and grid structure exhibit similar profiles, but differ greatly from those of rectilinear structure. Compressive brittleness is obvious in these composites. Along the height direction of preform printing, the composite with grid structure exhibits the highest compressive strength (519 MPa), whereas the composite with rectilinear structure displays the lowest compressive strength (396 MPa). Along the plane direction of preform printing, the composite with rectilinear structure possesses the highest compressive strength (556 MPa), whereas the composite with grid structure shows the lowest compressive strength (266 MPa). This indicates the mechanical properties of metal matrix composites with interpenetrating network structures can be effectively controlled by 3D-printed preforms with lattice structures.

Key words: interpenetrating network structure, 3D printing, lattice structure, compressive propert, SiC/Al-10Mg composite materials

CLC Number:

TB331

LI Qin-lin, LIU Hong-jun, WANG Qiong. Effect of lattice structures of 3D printed preforms on compressive properties of SiC/Al-10Mg composites with interpenetrating network structure[J]. Journal of Lanzhou University of Technology, 2025, 51(4): 7-14.

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