电焊机2024，Vol.54Issue(2)：17-23,7.DOI:10.7512/j.issn.1001-2303.2024.02.03
电爆法制备石墨烯及其铜基复合涂层的性能研究
Preparation of Graphene and its Copper-based Composite Coating by Electrical Explosion Method
摘要
Abstract
Graphene tends to agglomerate when mixed with metal powders and cannot be dispersed effectively and evenly,which prevents its excellent properties from being fully utilized.In order to solve the agglomeration problem of graphene in composite materials,this paper uses self-developed electrodetonation equipment to prepare graphene aerosol,mixes it with copper powder to get graphene/copper composite powder,and prepares composite coating.The graphene aerosols and com-posites were characterized by scanning electron microscopy(SEM),transmission electron microscopy(TEM)and atomic force microscopy(AFM),and the hardness and wear resistance of the coatings were tested.The results show that the gra-phene prepared by the electrodeposition method is mainly small-sized graphene with the diameter of 5～40 nm and the num-ber of layers of 3～7.In the graphene aerosol with a concentration of 0.875 mg/L,a single small diameter graphene sheet was adsorbed on the substrate before the substrate was placed for 10 min,but no gel was found after coagulation.After the sub-strate was placed for 10min,many small pieces of diameter graphene were stacked together to form graphene aerosol gel.Moreover,the longer the substrate was placed,the more severe the coagulation was,and the graphene aerosol gel clusters were growing.Small and medium size graphene of graphene/copper composite powder was uniformly adsorbed on the sur-face of copper powder.After further preparation of composite coating,it was found that the distribution of C element on the surface was uniform,indicating that the method of mixing graphene aerosol with copper powder can effectively solve the problem of graphene agglomeration in composite materials.The average hardness of 0.5 wt.%graphene/copper coating is 74.8 HV0.05,and the friction coefficient is 0.18,which have different degrees of improvement compared with pure copper coating.The results indicate that graphene aerosols prepared by the electric explosion method can be used to prepare gra-phene/copper composite coatings,improving the hardness and wear resistance of the coatings.This method is expected to provide a new approach for the preparation of high-performance graphene/metal composites.The results indicate that gra-phene aerosols prepared by the electric explosion method can be used to prepare graphene/copper composite coatings,im-proving the hardness and wear resistance of the coatings.This method is expected to provide a new approach for the prepara-tion of high-performance graphene/metal composites.关键词
电爆法/石墨烯气溶胶/石墨烯/铜复合粉体/石墨烯/铜复合涂层/耐磨性Key words
electrical explosion method/graphene aerosol/graphene/copper composite powder/graphene/copper composite coating/wear resistance分类
矿业与冶金引用本文复制引用
孙鹏,朱亮,靳鹏程,张爱华,王旭东,周辉,郭宁..电爆法制备石墨烯及其铜基复合涂层的性能研究[J].电焊机,2024,54(2):17-23,7.基金项目
国家自然科学基金(51765038) （51765038）
甘肃省2022年度优秀研究生"创新之星"项目(2022CXZX-395) （2022CXZX-395）
