多孔石墨烯/SiC基复合材料的直写3D打印制备

doi:10.19976/j.cnki.43-1448/TF.2024074

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Abstract Graphene/SiC_p/PCS slurry was prepared using graphene and SiC powder (SiC_p) 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/SiC_p 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.

Key words： direct ink write 3D printing graphene/SiC-based composite polycarbosilane porous ceramic ceramic slurry pyrolysis

Received: 02 September 2024 Published: 05 February 2025

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	TANG Run
	LIU Hongjun
	LI Yajun
	LI Yamin

Cite this article:

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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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2024074 OR http://pmbjb.csu.edu.cn/EN/Y2024/V29/I6/505

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