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Graphene nano-platelets reinforced aluminum composites with anisotropic compressive properties

机译:石墨烯纳米血小板增强铝复合材料,各向异性压缩性能

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Our recent work demonstrated that 5.0 vol% graphene nano-platelets (GNPs) may be introduced to aluminum alloys via powder metallurgy (PM) and multi-pass hot drawing. The produced composite rods had homogeneous GNPs distribution and high interfacial bonding strength and thus exhibited superior tensile strength compared to monolithic Al alloy. Moreover, aligned GNPs in various matrices can achieve stronger improvement in mechanical properties compared to composites with randomly distributed GNPs. Here, the GNP orientation dependent mechanical properties were demonstrated by compressive tests. The compressive yield strength (CYS) and ultimate compressive strength (UCS) of composite rods along drawn direction were increased 47% and 35% than those of Al, respectively. In addition, the composite rods showed higher CYS in drawn direction than that in radial direction. The anisotropic CYS may be related to <111> texture and alignment of dispersed GNPs in composites created by multiple drawing.
机译:我们最近的工作证明,5.0 Vol%的石墨烯纳米血小板(GNP)可以通过粉末冶金(PM)和多通热图引入铝合金。所生产的复合杆具有均匀的GNP分布和高界面粘合强度,因此与整体式Al合金相比表现出优异的拉伸强度。此外,与具有随机分布的GNP的复合材料相比,各种基质中的对准GNP可以达到机械性能的更强改善。这里,通过压缩试验证明了GNP取向依赖性机械性能。沿着拉伸方向的复合杆的压缩屈服强度(Cys)和极限压缩强度(UCS)分别比Al的增加47%和35%。另外,复合杆在绘制方向上显示出比径向的更高的Cys。各向异性Cys可能与<111>纹理相关,并在由多个图形产生的复合材料中的分散的GNP的纹理和对准。

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