Abstract
Reduced graphene oxide (rGO) enhanced B4C ceramics was prepared by SPS sintering, the enhancement effect of rGO on the microstructure and mechanical properties of composites was studied through experiments and numerical simulation. The results show that the composite with 2wt% rGO has the best comprehensive mechanical properties. Compared with pure boron carbide, vickers hardness and bending strength are increased by 4.8% and 21.96%, respectively. The fracture toughness is improved by 25.71%. The microstructure observation shows that the improvement of mechanical properties is mainly attributed to the pull-out and bridge mechanism of rGO and the crack deflection. Based on the cohesive force finite element method, the dynamic crack growth process of composites was simulated. The energy dissipation of B4C/rGO multiphase ceramics during crack propagation was calculated and compared with that of pure boron carbide ceramics. The results show that the fracture energy dissipation can be effectively increased by adding graphene.
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Funded by the National Natural Science Foundation of China (52002299)
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Liao, X., Gao, L., Wang, X. et al. Mechanical Properties of Boron Carbide/Reduced-graphene-oxide Composites Ceramics. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 37, 1087–1095 (2022). https://doi.org/10.1007/s11595-022-2638-4
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DOI: https://doi.org/10.1007/s11595-022-2638-4