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

作者:: 楊金山; 黃凱; 游瀟; 董紹明; 中國科學(xué)院上海硅酸鹽研究所高性能陶瓷和超微結(jié)構(gòu)國家重點實驗室
中國科學(xué)院上海硅酸鹽研究所結(jié)構(gòu)陶瓷與復(fù)合材料工程研究中心
中國科學(xué)院大學(xué)

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:: 石墨烯具有高強度、高導(dǎo)電、高導(dǎo)熱等優(yōu)異性能，可以顯著提高陶瓷基復(fù)合材料的力學(xué)、電學(xué)和熱學(xué)等性能。但受到分散均勻性、體積分數(shù)、界面調(diào)控等因素的影響，石墨烯優(yōu)異的性能在陶瓷基復(fù)合材料中還無法發(fā)揮。3D打印是一種簡單快速的增材制造技術(shù)，可以獲得結(jié)構(gòu)可控、形狀多樣化、大尺寸的三維石墨烯。三維石墨烯具有高的比表面積、大的孔隙率、優(yōu)異的可壓縮性和相互連接的導(dǎo)電網(wǎng)絡(luò)，可以有效避免石墨烯堆積團聚。通過組分系統(tǒng)設(shè)計，可以獲得具有剪切稀化特性的石墨烯漿料，流變性能結(jié)果顯示漿料粘度隨剪切速率增加而減小。利用化學(xué)氣相滲透工藝將SiC基體引入3D打印三維石墨烯，獲得三維石墨烯/SiC復(fù)合材料。SiC基體可均勻分布在石墨烯片層間，對提升石墨烯在復(fù)合材料中的增韌效果具有重要作用。3D打印三維石墨烯結(jié)合化學(xué)氣相滲透工藝有望實現(xiàn)高性能石墨烯/陶瓷基復(fù)合材料的結(jié)構(gòu)/功能一體化。

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.