3D打印三维石墨烯及其高性能陶瓷基复合材料-中国材料进展

文章信息/Info

Title:: Three-Dimensional Graphene by 3D Printing and Related Advanced Ceramic Matrix Composites

作者:: 杨金山; 黄凯; 游潇; 董绍明; 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室
中国科学院上海硅酸盐研究所结构陶瓷与复合材料工程研究中心
中国科学院大学

Author(s):: YANG Jinshan; HUANG Kai; YOU Xiao; DONG Shaoming; State Key Laboratory of High Performance Ceramics & Super?ne Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences
Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences
University of Chinese Academy of Sciences

Keywords:: graphene; 3D printing; rheological property; ceramic matrix composites; chemical vapor infiltration

摘要:: 石墨烯具有高强度、高导电、高导热等优异性能，可以显著提高陶瓷基复合材料的力学、电学和热学等性能。但受到分散均匀性、体积分数、界面调控等因素的影响，石墨烯优异的性能在陶瓷基复合材料中还无法发挥。3D打印是一种简单快速的增材制造技术，可以获得结构可控、形状多样化、大尺寸的三维石墨烯。三维石墨烯具有高的比表面积、大的孔隙率、优异的可压缩性和相互连接的导电网络，可以有效避免石墨烯堆积团聚。通过组分系统设计，可以获得具有剪切稀化特性的石墨烯浆料，流变性能结果显示浆料粘度随剪切速率增加而减小。利用化学气相渗透工艺将SiC基体引入3D打印三维石墨烯，获得三维石墨烯/SiC复合材料。SiC基体可均匀分布在石墨烯片层间，对提升石墨烯在复合材料中的增韧效果具有重要作用。3D打印三维石墨烯结合化学气相渗透工艺有望实现高性能石墨烯/陶瓷基复合材料的结构/功能一体化。

Abstract:: Graphene offers many superior properties like high strength, ultrahigh electrical conductivity and superior thermal conductivity, which can be used to improve the properties of ceramic matrix composites. However, the aggregation and restack of graphene give a restriction for the application. 3D printing is one additive manufacturing technology, which can be adopted for the controlled preparation of 3D graphene. The special porous microstructure of 3D graphene results in larger specific surface area, higher porosity, excellent compressibility and interconnected conductive network. The rheological properties of inks show that apparent viscosity decreases along with the shear rate increases, indicating shearthinning of inks required for 3D printing. 3D graphene/SiC composites are obtained by introducing SiC into 3D graphene using chemical vapor infiltration (CVI) process. Fracture surface suggests the uniform distribution of SiC and pullout of graphene. It demonstrates the advantages of 3D graphene/SiC by combining 3D printing and CVI.