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Materials Science and Engineering of Powder Metallurgy  2022, Vol. 27 Issue (3): 294-301    DOI: 10.19976/j.cnki.43-1448/TF.2022001
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Effect of graphene introduction on properties of SiCf/SiC composites
WANG Xuhui, CHEN Zhaoke, LI Guowang, SU Kang, MAO Jian, XIONG Xiang
Science and Technology on High Strength Structural Materials Laboratory, Central South University, Changsha 410083, China
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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.
Key wordsgraphene      SiCf/SiC composites      chemical vapor infiltration      mechanical property      thermal conductivity     
Received: 05 January 2022      Published: 19 July 2022
ZTFLH:  TB332  
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WANG Xuhui
CHEN Zhaoke
LI Guowang
SU Kang
MAO Jian
XIONG Xiang
Cite this article:   
WANG Xuhui,CHEN Zhaoke,LI Guowang, et al. Effect of graphene introduction on properties of SiCf/SiC composites[J]. Materials Science and Engineering of Powder Metallurgy, 2022, 27(3): 294-301.
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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2022001     OR     http://pmbjb.csu.edu.cn/EN/Y2022/V27/I3/294
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