| 基于机械搅拌和烧结工艺制备的GNPs/Al复合材料特性研究 |
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| 引用本文： | 于欢,周明哲,夏金环,王荣荣,马百常,周吉学,张素卿,吴建华,王西涛. 基于机械搅拌和烧结工艺制备的GNPs/Al复合材料特性研究[J]. 稀有金属材料与工程, 2022, 51(8): 3041-3048 |
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| 作者姓名： | 于欢 周明哲 夏金环 王荣荣 马百常 周吉学 张素卿 吴建华 王西涛 |
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| 作者单位： | 山东省轻质高强金属材料重点实验室,中南大学,山东省轻质高强金属材料重点实验室,山东省轻质高强金属材料重点实验室,山东省轻质高强金属材料重点实验室,山东省轻质高强金属材料重点实验室,山东省轻质高强金属材料重点实验室,山东省轻质高强金属材料重点实验室,山东省轻质高强金属材料重点实验室 |
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| 基金项目： | 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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| 摘 要： | 采用机械搅拌和烧结工艺制备了GNPs/Al复合材料,实现了无损伤GNPs的完全铺展及在铝基体中均匀弥散分布。研究了GNPs对复合材料粉末冷压-烧结致密化行为的作用机制,阐明了GNPs对复合材料强度和塑性的作用机理,探讨了烧结时间对GNPs/Al复合材料力学性能的影响规律。结果表明,GNPs含量低于0.5%,烧结态GNPs/Al复合材料相对密度达到98%以上。烧结态Al-0.5wt.%GNPs屈服强度达到204MPa,相对于纯铝提高了18.6%。以Al-0.5wt.%GNPs为例,烧结6h后,复合材料硬度为61.5HV,屈服强度为173MPa,压缩应变40%时未发生明显破坏。
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| 关 键 词： | 粉末冶金 金属基复合材料 石墨烯 强化机制 |
| 收稿时间： | 2021-07-20 |
| 修稿时间： | 2021-09-22 |
Properties of GNPs / Al composites prepared by mechanical stirring and sintering |
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| 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 |
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| Authors: | Yu Huan Zhou Mingzhe Xia Jinhuan Wang Rongrong Ma Baichang Zhou Jixue Zhang Suqing Wu Jianhua Wang Xitao |
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| Affiliation: | Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials,Advanced Materials Institute,Qilu University of Technology Shandong Academy of Sciences,Central South University,Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials,Advanced Materials Institute,Qilu University of Technology Shandong Academy of Sciences,Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials,Advanced Materials Institute,Qilu University of Technology Shandong Academy of Sciences,Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials,Advanced Materials Institute,Qilu University of Technology Shandong Academy of Sciences,Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials,Advanced Materials Institute,Qilu University of Technology Shandong Academy of Sciences,Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials,Advanced Materials Institute,Qilu University of Technology Shandong Academy of Sciences,Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials,Advanced Materials Institute,Qilu University of Technology Shandong Academy of Sciences,Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials,Advanced Materials Institute,Qilu University of Technology Shandong Academy of Sciences |
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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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| Keywords: | Powder metallurgy Metal-matrix composites Graphene nanoplatelets Strengthening mechanisms |
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