石墨烯增强铝基复合材料的制备与性能研究  

Preparation and Properties of Graphene Reinforced Aluminum Matrix Composites

作　　者：马会中 赵志凯 夏慧敏 张兰 MA Huizhong;ZHAO Zhikai;XIA Huimin;ZHANG Lan(School of Mechanics and Engineering Sciences,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学力学与工程科学学院,河南郑州450001

出　　处：《热加工工艺》2020年第20期75-79,共5页Hot Working Technology

基　　金：国家自然科学基金资助项目(61350006);郑州市科技局领军人才项目(61350006)。

摘　　要：为了研究不同工艺条件(烧结温度、石墨烯纳米片含量)对复合材料的硬度、摩擦性能、弹性模量等性能的影响,以7075铝合金粉末为基体材料,石墨烯纳米片(GNPs)为增强体,采用机械球磨混粉、放电等离子烧结(SPS)的方法制备了石墨烯/铝合金复合材料和铝合金材料,并进行了SEM、XRD和拉曼光谱表征分析。结果表明:石墨烯纳米片能够均匀分布在铝合金基体中,并与基体材料形成良好的结合界面,无Al4C3相生成;当烧结温度为550℃、石墨烯含量分别为0.5wt%和0.3wt%时,复合材料的硬度和弹性模量分别达到最大的130.8 HV和135.7 GPa,比单一铝合金材料分别提高18.6%和35.9%;当石墨烯含量为0.5wt%时,复合材料的摩擦系数最低,为0.108,比单一铝合金材料降低了28.5%。In order to study the effects of different processes(sintering temperature and contents of graphene) on the hardness, friction and elastic modulus of the composites, taking 7075 aluminum alloy as the matrix material, and graphene nanoparticles(GNPs) as the reinforcement, the graphene/aluminum alloy composites and aluminum alloy materials were prepared by mechanical ball milling and spark plasma sintering(SPS), and SEM, XRD and Raman spectroscopic analysis were carried out. The results show that, graphene nano sheet can be uniformly distributed in the aluminum alloy matrix and form a good bonding interface with the matrix material. There is no Al4 C3 phase formation. When the sintering temperature is550 ℃, and the graphene content is 0.5 wt% and 0.3 wt% respectively, the hardness and elastic modulus of the composites reach the maximum of 130.8 HV and 135.7 GPa, respectively, which are 18.6% and 35.9% higher than that of single aluminum alloy. When the graphene content is 0.5 wt%, the friction coefficient of the composite is the minimum of 0.108,which is 28.5% lower than that of single aluminum alloy.

关 键 词：放电等离子烧结 石墨烯纳米片 石墨烯/铝合金复合材料 材料性能 

分 类 号：TB333.12[一般工业技术—材料科学与工程]