Abstract：In this paper, graphene contained SiCf/SiC composites were prepared by a two-step process, with graphene/SiC slurry introduced by slurry brushing first, then followed a chemical vapor infiltration of SiC matrix. The effects of graphene mass fraction in the slurry on the microstructure, mechanical properties and thermal conductivity of SiCf/SiC composites were studied by using scanning electron microscopy, three-point bending test and laser flash apparatus. The results show that, when the mass fraction of graphene is 2%, the distribution of graphene in the slurry layer is uniformly, resulting in the highest thermal conductivity of 13.14 W/(m·K) of the composites. With the increase of the mass fraction, the distribution of graphene in the slurry layer is deteriorated, which leads to a decrease of the density and thermal conductivity of SiCf/SiC composites. However, although graphene begins to agglomerate at a mass fraction of 4%, the composites possess the highest flexural strength of 328.12 MPa, due to the well bonding between graphene and the SiC matrix.
王徐辉, 陈招科, 李国旺, 苏康, 毛健, 熊翔. 石墨烯添加对SiCf/SiC复合材料性能的影响[J]. 粉末冶金材料科学与工程, 2022, 27(3): 294-301.
WANG Xuhui, CHEN Zhaoke, LI Guowang, SU Kang, MAO Jian, XIONG Xiang. Effect of graphene introduction on properties of SiCf/SiC composites. Materials Science and Engineering of Powder Metallurgy, 2022, 27(3): 294-301.
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2022, Vol. 27 
