Abstract In this study, a high-performance hybrid aluminum matrix composite (HAMC) reinforced with ceramic particles and carbon nanotubes (CNTs) is analyzed. A novel multi-step micromechanical approach, based on the Mori-Tanaka model and the generalized method of cell, is proposed in order to predict the effective elastic modulus and Poisson's ratio of the HAMCs. The influences of volume fraction, aspect ratio, waviness shape, alignment and agglomeration of CNTs, and ceramic particle volume fraction on the mechanical properties of CNT/ceramic particle-reinforced HAMCs are explored. Moreover, the role of aluminum carbide (Al4C3) which may be formed at the CNT/matrix interface in the mechanical behavior is micromechanically investigated. It is found that adding a small amount of CNTs into the microscale ceramic particle-reinforced aluminum matrix composites (AMCs) can significantly improve the effective mechanical properties of the resultant HAMCs. As compared to HAMCs, which contain the randomly dispersed CNTs, the alignment of CNTs into the HAMCs leads to a higher level of mechanical properties. However, the waviness and agglomeration of CNTs can decrease the HAMC elastic modulus. According to the obtained results, the CNT/matrix interfacial interaction may have significant effects on the effective properties of the particulate hybrid metal-based composites. The elastic properties estimated by the micromechanical model are compared to those measured by the experimental method. The outcomes of this research suggest that these hybrid metal-based composites, containing CNTs, have significant potential in diverse engineering applications as compared to the conventional metal-based composites.

中文翻译：

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添加碳纳米管对陶瓷颗粒铝基复合材料有效力学性能影响的评价

摘要 在这项研究中，分析了用陶瓷颗粒和碳纳米管 (CNT) 增强的高性能混合铝基复合材料 (HAMC)。为了预测HAMC的有效弹性模量和泊松比，提出了一种基于Mori-Tanaka模型和细胞广义方法的新型多步微机械方法。探讨了CNTs的体积分数、纵横比、波纹形状、排列和团聚以及陶瓷颗粒体积分数对CNT/陶瓷颗粒增强HAMCs力学性能的影响。此外，碳化铝（Al4C3）可能在碳纳米管/基体界面形成的力学行为中的作用进行了微观力学研究。结果表明，在微尺度陶瓷颗粒增强铝基复合材料（AMCs）中加入少量的碳纳米管可以显着提高所得HAMCs的有效力学性能。与包含随机分散的碳纳米管的 HAMC 相比，碳纳米管与 HAMC 的排列导致更高水平的机械性能。然而，碳纳米管的波纹度和团聚会降低 HAMC 弹性模量。根据所得结果，CNT/基质界面相互作用可能对颗粒状杂化金属基复合材料的有效性能产生显着影响。将微机械模型估计的弹性特性与实验方法测量的弹性特性进行比较。这项研究的结果表明，这些含有碳纳米管的混合金属基复合材料，