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石墨烯含量对石墨烯/Al-15Si-4Cu-Mg复合材料微观组织和力学性能的影响

水丽 张凯 于宏

水丽, 张凯, 于宏. 石墨烯含量对石墨烯/Al-15Si-4Cu-Mg复合材料微观组织和力学性能的影响[J]. 工程科学学报, 2019, 41(9): 1162-1167. doi: 10.13374/j.issn2095-9389.2019.09.007
引用本文: 水丽, 张凯, 于宏. 石墨烯含量对石墨烯/Al-15Si-4Cu-Mg复合材料微观组织和力学性能的影响[J]. 工程科学学报, 2019, 41(9): 1162-1167. doi: 10.13374/j.issn2095-9389.2019.09.007
SHUI Li, ZHANG Kai, YU Hong. Effect of graphene content on the microstructure and mechanical properties of graphene-reinforced Al-15Si-4Cu-Mg matrix composites[J]. Chinese Journal of Engineering, 2019, 41(9): 1162-1167. doi: 10.13374/j.issn2095-9389.2019.09.007
Citation: SHUI Li, ZHANG Kai, YU Hong. Effect of graphene content on the microstructure and mechanical properties of graphene-reinforced Al-15Si-4Cu-Mg matrix composites[J]. Chinese Journal of Engineering, 2019, 41(9): 1162-1167. doi: 10.13374/j.issn2095-9389.2019.09.007

石墨烯含量对石墨烯/Al-15Si-4Cu-Mg复合材料微观组织和力学性能的影响

doi: 10.13374/j.issn2095-9389.2019.09.007
详细信息
  • 中图分类号: TB333

Effect of graphene content on the microstructure and mechanical properties of graphene-reinforced Al-15Si-4Cu-Mg matrix composites

  • 摘要: 低温球磨分散结合真空热压烧结工艺制备了石墨烯增强的Al-15Si-4Cu-Mg基复合材料.采用扫描电镜、X射线衍射、能谱分析和透射电镜表征了复合材料微观结构,通过抗拉强度和硬度测试,研究了石墨烯添加量对石墨烯/Al-15Si-4Cu-Mg复合材料微观组织和力学性能的影响.结果表明:当石墨烯质量分数分别为0.4%和0.8%,石墨烯沿基体晶界均匀分布,钉扎晶界,石墨烯与Al-15Si-4Cu-Mg基体界面结合良好,初晶β-Si、Mg2Si和Al2Cu相弥散分布于基体中.当石墨烯质量分数上升至1%,石墨烯分散困难,过量石墨烯富集于晶粒边界处,诱发脆性鱼骨状Al4Cu2Mg8Si7相沿晶界析出.当石墨烯质量分数为0.8%时,石墨烯/Al-15Si-4Cu-Mg复合材料的拉伸强度和硬度分别达到321 MPa和HV 98,相比纯Al-15Si-4Cu-Mg复合材料分别提高了19.3%和46.2%;当石墨烯质量分数为0.4%时,复合材料的屈服强度高达221 MPa,硬度和塑性亦获得明显改善.
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出版历程
  • 收稿日期:  2018-08-10

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