Graphene Size Dependent Hardness and Strengthening Mechanisms of Cu/Graphene Composites:A Molecular Dynamics Study

作     者：Zhang Shuang Chang Guo Li Liang Li Xiang Peng Haoran Chen Kaiyun Yang Nan Huo Wangtu 张霜;常国;李亮;李响;彭浩然;陈凯运;杨楠;霍望图

作者机构：Advanced Materials Research CenterNorthwest Institute for Nonferrous Metal ResearchXi'an 710016China United Technology CenterWestern Metal Materials Co.LtdXi'an 710201China 

出 版 物：《稀有金属材料与工程》 (Rare Metal Materials and Engineering)

年 卷 期：2025年第54卷第1期

页      面：17-26页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Foundation of Northwest Institute for Nonferrous Metal Research(ZZXJ2203) Capital Projects of Financial Department of Shaanxi Province(YK22C-12) Innovation Capability Support Plan in Shaanxi Province(2023KJXX-083) Key Research and Development Projects of Shaanxi Province(2024GXYBXM-351,2024GX-YBXM-356) National Natural Science Foundation of China(62204207,12204383) Xi'an Postdoctoral Innovation Base Funding Program 

主　　题：Cu/graphene composites graphene size hardness strengthening mechanism molecular dynamics 

摘      要：The extraordinary strength of metal/graphene composites is significantly determined by the characteristic size,distribution and morphology of ***,the effect of the graphene size/distribution on the mechanical properties and related strengthening mechanisms has not been fully ***,under the same volume fraction and distribution conditions of graphene,molecular dynamics simulations were used to investigate the effect of graphene sheet size on the hardness and deformation behavior of Cu/graphene composites under complex stress *** models of pure single crystalline Cu and graphene fully covered Cu matrix composite were constructed for *** results show that the strengthening effect changes with varying the graphene sheet *** the graphene dislocation blocking effect and the load-bearing effect,the deformation mechanisms change from stacking fault tetrahedron,dislocation bypassing and dislocation cutting to dislocation nucleation in turn with decreasing the graphene sheet *** hardness of Cu/graphene composite,with the graphene sheet not completely covering the metal matrix,can even be higher than that of the fully covered *** extra strengthening mechanisms of dislocation bypassing mechanism and the stacking fault tetrahedra pinning dislocation mechanism contribute to the increase in hardness.