电爆法制备石墨烯气溶胶用于石墨烯包覆铝复合粉体  

Preparation of Graphene-Coated Aluminum Composite Powder by Dispersing Graphene Aerosol Through Electrical Explosion

作　　者：王旭东 周辉 孙鹏 张爱华[2] 朱亮[1] Wang Xudong;Zhou Hui;Sun Peng;Zhang Aihua;Zhu Liang(School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;College of Electrical and Information Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]兰州理工大学电气工程与信息工程学院,甘肃兰州730050

出　　处：《稀有金属材料与工程》2023年第1期81-86,共6页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(62173170)。

摘　　要：提出了一种通过电爆法制备石墨烯气溶胶并将其用于石墨烯包覆铝复合粉体的新方法,在不破坏石墨烯本征特性的前提下,解决了石墨烯在金属复合粉体中分散不均匀、界面结合弱的问题。利用电爆法制备了一定浓度的石墨烯气溶胶,得到的石墨烯有2种结构:片状和凝胶状。石墨烯层数为5~8层,石墨烯气溶胶均匀分散在腔内。另外,在气流的作用下,通过搅拌将石墨烯气溶胶与球形铝粉颗粒混合,制备了石墨烯含量不同的石墨烯包覆铝复合粉体。当石墨烯气溶胶含量为1.5%(质量分数)时,石墨烯均匀分散在复合材料中,石墨烯片粘附包裹在金属颗粒上。最后,分析了石墨烯气溶胶原位混合形成石墨烯金属复合粉体的机理。A new method to produce graphene-coated aluminum composite powder by graphene aerosol prepared by electrical explosion was proposed.This method solves the problems of uneven dispersion and weak interfacial bonding of graphene in the metal composite powder without damaging the intrinsic properties of graphene.The graphene aerosol of specific content was prepared by the electrical explosion,and the obtained graphene had two structures,namely the flake graphene and the gel graphene.The graphene had 5‒8 layers,and the graphene aerosol was uniformly dispersed in the chamber.Then,the graphene aerosols were mixed with spherical aluminum particles by stirring under the air flow,and the graphene-coated aluminum composite powders with different graphene contents were prepared.When the content of graphene aerosol is 1.5wt%,the graphene is uniformly dispersed in the aluminum composite powder and the graphene sheets adhere to the metal particles.Finally,the mechanism of in-situ formation of graphene-coated metal composite powder by dispersing of graphene aerosols was analyzed.

关 键 词：电爆法 石墨烯气溶胶 气溶胶凝并 复合粉体 

分 类 号：TB333[一般工业技术—材料科学与工程]