| [Yu Huan,Zhou Mingzhe,Xia Jinhuan,Wang Rongrong,Ma Baichang,Zhou Jixue,Zhang Suqing,Wu Jianhua and Wang Xitao.Properties of GNPs / Al composites prepared by mechanical stirring and sintering[J].Rare Metal Materials and Engineering,2022,51(8):3041~3048.] |
| Properties of GNPs / Al composites prepared by mechanical stirring and sintering |
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| Received:July 20, 2021 Revised:September 22, 2021 |
| DOI： |
| Key words: Powder metallurgy Metal-matrix composites Graphene nanoplatelets Strengthening mechanisms |
| Foundation item:国家自然科学基金资助（项目号52004135, 51804190）；山东省自然科学基金资助项目（项目号ZR2020QE147）；山东省科学院青年基金资助项目（项目号2020QN0020）；山东省重点研发计划（项目号2019JZZY020329, 2019JZZY010364）；济南市高校院所创新团队项目（项目号2019GXRC030） |
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| Abstract: |
| In this paper, GNPs/Al composites were prepared by mechanical stirring and sintering method. The complete spreading of non-destructive GNPs and uniform distribution of GNPs in aluminum matrix were realized. The effect mechanism of GNPs on the densification behavior of composite powder during cold pressing and sintering was studied. The effect mechanisms of GNPs on the strength and plasticity of composite was clarified. The effect of sintering time on the mechanical properties of GNPs/Al composite was discussed. The results showed that the relative density of sintered GNPs/Al composite was more than 98% when the content of GNPs was less than 0.5%. The yield strength of as sintered Al-0.5wt.% GNPs reached 204 MPa, which is 18.6% higher than that of pure aluminum. Taking Al-0.5wt.% GNPs as an example, after sintering for 6h, the hardness of the composite was 61.5HV and the yield strength was 173 MPa. No obvious failure occurred at the compression strain being 40%. |
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