Abstract Aggregation and weak interfacial bonding limit the superior strengthening potential of the carbon nanotubes (CNTs) in the metal matrix composites. To overcome these challenges, in situ Mg2Si nanoparticles (Mg2Sip) have been hybridized with surface modified CNTs through chemical oxidization. The synergistic strengthening was enhanced by tailoring the volume ratios of CNTs to Mg2Sip in the Mg matrix through powder thixoforming technology. Herein, when 0.3CNTs-1.2Mg2Sip was added, a yield strength, ultimate tensile strength, and elongation of 213 MPa, 271 MPa, and 6.3%, respectively, were obtained, which were 18.3%, 16.8%, and 3.3% higher than those of the 0.75CNTs-0.75Mg2Sip/Mg composites, respectively. The strengthening effects of the CNTs-Mg2Sip reinforcements were more effective than those of the individual 1.5CNTs and 1.5Mg2Sip owing to the effective thermal mismatch and load transfer strengthening mechanisms. In this study, we propose an effective approach to harness the superior performances of the hybrid reinforcements for enhancing the composites.

中文翻译：

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化学氧化碳纳米管和原位 Mg2Sip 增强的镁基复合材料杂化

摘要 聚集和弱界面结合限制了碳纳米管 (CNTs) 在金属基复合材料中的优越强化潜力。为了克服这些挑战，原位 Mg2Si 纳米粒子 (Mg2Sip) 已通过化学氧化与表面改性的 CNT 杂交。通过粉末触变成形技术调整 Mg 基体中 CNT 与 Mg2Sip 的体积比，增强了协同强化。其中，当加入 0.3CNTs-1.2Mg2Sip 时，屈服强度、极限拉伸强度和伸长率分别为 213 MPa、271 MPa 和 6.3%，分别提高了 18.3%、16.8% 和 3.3%。分别为 0.75CNTs-0.75Mg2Sip/Mg 复合材料。CNTs-Mg2Sip 增强剂的强化效果比单个 1.5CNTs 和 1.5CNTs 的强化效果更有效。5Mg2Sip 由于有效的热失配和负载转移强化机制。在这项研究中，我们提出了一种有效的方法来利用混合增强材料的卓越性能来增强复合材料。