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| Microstructure and properties of graphene/2024Al composites prepared by powder metallurgy |
| PENG Yujie1，LIU Pei1，2，LIU Kunding1，WANG Jie1，WU Shuaikui1，ZHOU Zheng1 |
| 1.College of Materials Science and Engineering，Henan University of Science and Technology，Luoyang
471023，China； 2. Provincial and Ministerial Co-construction of Collaborative Innovation Center for Nonferrous
Metal New Materials and Advanced Processing Technology，Luoyang 471023，China |
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Abstract In this paper, graphene nanosheets and 2024Al alloy powder were used to prepare graphene /2024Al matrix
composites with different contents by the method of cold isostatic pressing + vacuum sintering + hot extrusion.
The microstructure and mechanical properties of graphene/2024Al with different contents were investigated by
SEM characterization, EDS analysis and property tests. The results show that the graphene in the composite presents
a random distribution after cold isostatic pressing and vacuum sintering, and the density of composite is relatively
low in this case. But when the graphene/2024Al composite is hot-extruded, the graphene in the composite
presents an aligned arrangement, and the density of composite is obviously enhanced. Then tensile strength of
0.5% and 1% hot-extruded graphene/2024Al composite reaches 290.6 MPa and 321.1 MPa, which is improved by
48.8% and 64.4% compared with the 2024Al matrix, respectively. These results show that the addition of graphene
and the increase of graphene content can effectively enhance the tensile strength of graphene/Al composite.
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Received: 09 April 2021
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Corresponding Authors:
柳培（1991—），男，博士，博士后，讲师，主要研究方向为高性能新型金属基复合材料。
E-mail: liupei@haust.edu.cn
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2022, Vol. 32 
