Mechanical Properties of Boron Carbide/Reducedgraphene-oxide Composites Ceramics  

作　　者：LIAO Xusheng GAO Li WANG Xin ZHANG Fan LIU Lisheng REN Lin 廖旭升;GAO Li;WANG Xin;ZHANG Fan;LIU Lisheng;任琳(School of Science,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Advanced for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]School of Science,Wuhan University of Technology,Wuhan 430070,China [2]State Key Laboratory of Advanced for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2022年第6期1087-1095,共9页武汉理工大学学报（材料科学英文版）

基　　金：by the National Natural Science Foundation of China(52002299)。

摘　　要：Reduced graphene oxide(rGO)enhanced B_(4)C 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 pullout 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 B_(4)C/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.

关 键 词：boron carbide matrix composites graphene oxide mechanical property cohesive finite element method 

分 类 号：TQ174.1[化学工程—陶瓷工业]