标题：Reinforcing effect of graphene on the mechanical properties of Al2O3/TiC ceramics
作者：Li Zuoli;Zhao Jun;Sun Jialin;Gong Feng;Ni Xiuying
作者机构：[Li Zuoli] School of Mechanical Engineering, Shandong University, Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Ed 更多
通讯作者地址：[Zhao, J]Shandong Univ, Sch Mech Engn, Minist Educ, Key Lab High Efficiency & Clean Mech Manufacture, Jinan 250061, Shandong, Peoples R China.
关键词：mechanical properties; ceramics; graphene; simulation; interface
摘要：Multilayer graphene (MLG)-reinforced Al2O3/TiC ceramics were fabricated through hot pressing sintering, and the reinforcing effect of MLG on the microstructure and mechanical properties of the composites was investigated by experiment and simulation. The simulation of dynamic crack initiation and propagation was investigated based on the cohesive zone method. The results show that the composite added with 0.2wt% MLG has excellent flexural strength and high fracture toughness. The major reinforcing mechanisms are the synergistic effect by strong and weak bonding interfaces, MLG pull-out, and grain refinement resulting from the addition of MLG. In addition, the aggravating of crack deflection, branching, blunting, and bridging have indispensable contribution to the improvement of the as-designed materials.