Preparation and properties of graphene nanoplatelets reinforced aluminum composites  

石墨烯纳米片增强铝基复合材料的制备与性能

作　　者：Zhong ZHENG Xiao-xia YANG Jian-chao LI Xue-xi ZHANG Imran MUHAMMAD Lin GENG 郑忠;杨晓霞;李建超;张学习;Imran MUHAMMAD;耿林(哈尔滨工业大学材料科学与工程学院,哈尔滨150001;山东大学材料科学与工程学院,济南250014;Mechanical Engineering Department,University of Engineering&Technology Taxila,Taxila 47050,Pakistan)

机构地区：[1]School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China [2]College of Materials Science and Engineering,Shandong University,Jinan 250014,China [3]Mechanical Engineering Department,University of Engineering&Technology Taxila,Taxila 47050,Pakistan

出　　处：《Transactions of Nonferrous Metals Society of China》2021年第4期878-886,共9页中国有色金属学报（英文版）

基　　金：financial supports from National Key R&D Program of China (2017YFB0703103);Key Area R&D Program of Guangdong Province,China (2019B010942001)。

摘　　要：5.0 vol.% graphene nanoplatelets(GNPs) and aluminum powders were mixed to prepare GNPs/Al composites via high-energy ball milling(HEBM). The mixed powders were subjected to spark plasma sintering(SPS) and subsequent hot extrusion. The microstructure and mechanical properties of extruded composites were investigated by X-ray photoelectron spectroscopy(XPS), transmission electron microscopy(TEM) and tensile tests. In the extruded composites, 5.0 vol.% GNPs were dispersed homogeneously and no serious GNP-Al interfacial reaction occurred. As a result, the yield strength and ultimate tensile strength of the extruded GNPs/Al composites reached 462 and 479 MPa, which were 62% and 60% higher than those of the extruded Al matrix, respectively. The enhanced mechanical properties were attributed to the effective load transfer capacity of dispersed GNPs. This demonstrated that it may be promising to introduce dispersed high-content GNPs via HEBM, SPS and hot extrusion techniques and GNP-Al interfacial reaction can be controlled.采用高能球磨、放电等离子烧结以及热挤压工艺制备含量为5.0%(体积分数)的石墨烯增强铝基复合材料。分别采用X射线光电子能谱、透射电镜及拉伸试验研究挤压态复合材料的显微组织与力学性能,发现5.0%(体积分数)的石墨烯分散在铝晶界上,并且未与铝基体发生界面反应。最终,挤压态复合材料的屈服强度和抗拉强度高达462 MPa和479 MPa,分别比挤压态铝基体提高62%和60%。断口分析表明,在断裂过程中复合材料中分散的石墨烯起到明显的载荷传递的作用。上述结果表明,采用高能球磨、放电等离子烧结以及热挤压制备工艺可将高含量石墨烯分散于铝合金中,且能控制石墨烯和铝基体之间的界面反应。

关 键 词：aluminum matrix composites graphene nano-platelets powder metallurgy interface microstructure mechanical properties 

分 类 号：TB333[一般工业技术—材料科学与工程]