Microstructure and Properties of Graphene/7075Al Composites with Different Graphene Contents

Jia Tianqi; Yang Bin; Du Gengxin; Cheng Fulai; An Jiatuo; Zhao Ziwei; Xiao Yajiao; Zhang Zaimiao

doi:10.15980/j.tzzz.2018.12.019

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Microstructure and Properties of Graphene/7075Al Composites with Different Graphene Contents
Vol. 38, Issue 12, Pages: 1348-1351(2018)
Published： 2018 ，
DOI： 10.15980/j.tzzz.2018.12.019

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[1]贾天琪,杨斌,杜更新,程福来,安家托,赵紫薇,肖亚姣,张再苗.不同含量石墨烯/7075铝基复合材料的组织与性能[J].特种铸造及有色合金,2018,38(12):1348-1351.

Jia Tianqi, Yang Bin, Du Gengxin, et al. Microstructure and Properties of Graphene/7075Al Composites with Different Graphene Contents. [J]. Special Casting & Nonferrous Alloys 38(12):1348-1351(2018)
[1]贾天琪,杨斌,杜更新,程福来,安家托,赵紫薇,肖亚姣,张再苗.不同含量石墨烯/7075铝基复合材料的组织与性能[J].特种铸造及有色合金,2018,38(12):1348-1351. DOI： 10.15980/j.tzzz.2018.12.019.

Jia Tianqi, Yang Bin, Du Gengxin, et al. Microstructure and Properties of Graphene/7075Al Composites with Different Graphene Contents. [J]. Special Casting & Nonferrous Alloys 38(12):1348-1351(2018) DOI： 10.15980/j.tzzz.2018.12.019.

摘要

通过改进的Hummer法制备氧化石墨烯胶体

并结合低温球磨混粉与真空热压烧结方法

成功制备出GNSs质量分数分别为0.75%和1%的7075铝基复合材料。利用扫描电镜（SEM）、显微维氏硬度计和室温拉伸试验机等手段

对GNSs/7075铝基复合材料的显微组织、力学性能及断口形貌进行了分析。结果表明

GNSs含量为0.75%时与含量为1%的复合材料相比

GNSs纳米片与铝基体包覆完整

未出现层片状GNSs团聚现象。GNSs含量为0.75%和1%的复合材料硬度（HV）从90（未添加GNSs的铝合金）分别增加到125和140;复合材料的抗拉强度和伸长率均先增后降

抗拉强度最高达到250.71MPa

伸长率最高达到6.18%。由于加入GNSs量较少

3种复合材料密度变化不大。

Abstract

Graphene oxide colloid was prepared by the modified Hummer method.In combination with cryomilling and hot pressing sintering

graphene/7075 Al composites with 0.75%and 1%graphene content were prepared successfully.The microstructure

mechanical properties and fracture morphology of the graphene/7075 Al composites were investigated by scanning electron microscope（SEM）

vickers hardness tester and static tensile tests

respectively.The results reveal that compared with 1%graphene composite

the graphene nanocrystal of 0.75% graphene composite is completely coated with aluminum matrix

and there is no lamellar graphene agglomeration.The hardness of composites with 0.75% and1% graphene content is increased from 90 HV（no addition of graphene 7075 Al）to 125 HV and 140 HV

respectively.Both the tensile strength and elongation of the composites are increased firstly and then decreased

and the highest tensile strength value reaches 250.71 MPa and the maximum elogation value reaches 6.18%.Because the amount of graphene addition is less

the density of the composites is changed slightly.