Preparation of porous graphene/SiC-based composite by direct ink write 3D printing
TANG Run1, LIU Hongjun1,2, LI Yajun1, LI Yamin1,2
1. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 2. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
Abstract Graphene/SiCp/PCS slurry was prepared using graphene and SiC powder (SiCp) as fillers and polycarbosilane (PCS) as ceramic precursor, and then the porous lightweight conductive graphene/SiC-based composite was prepared by direct ink write 3D printing and high temperature pyrolysis method. The influences of slurry composition and printing process on 3D printing formability were investigated, and the microstructure and properties of composite were characterized. The results show that the formability of the extruded filament is suitable for printing when the slurry viscosity is about 32.0 Pa·s by controlling the solid content, graphene content in graphene/SiCp composite powder, and dispersant content. When the printing speed is 360 mm/min and the layer height is 0.48 mm, the formability of the lattic grid structure for 3D printing is optimal. After heating the printed green body at 1 100 ℃ for 2 h, PCS is pyrolyzed into ceramics, the average compressive strength and conductivity of the composite are 11 MPa and 8 S/m, respectively. This study provides a new pathway for the preparation of porous graphene/SiC-based composite.
TANG Run,LIU Hongjun,LI Yajun, et al. Preparation of porous graphene/SiC-based composite by direct ink write 3D printing[J]. Materials Science and Engineering of Powder Metallurgy, 2024, 29(6): 505-513.
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2024, Vol. 29 
