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Influence of acid-treated time of carbon nanotubes on mechanical property in carbon nanotubes reinforced copper matrix composites

机译：碳纳米管酸处理时间对碳纳米管加强铜基复合材料中力学性能的影响

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摘要

Carbon nanotubes reinforced copper matrix (CNT/Cu) composites with high mechanical properties were successfully fabricated by wet mixing and spark plasma sintering (SPS). The effects of CNTs acidification time and CNTs content on the microstructure and mechanical properties of composites were characterized by SEM, FTIR, Raman, HR-TEM and tensile tests. The composites with 24 h acid-treated CNTs (0.5 wt%) and sintered at 837 K had the most optimal mechanical properties, which primarily stemmed from the use of oxygen as an atomic transient agent to form solid Cu-CNT interfacial bonding, the complete densification of the composites and the uniform dispersion of the CNTs. From the density functional calculations, the strong contact mode of Cu2O-CNT is conducive to the improvement of mechanical properties. In addition, the reinforcing effect of surface modification at different acidification times of CNTs was studied and discussed by the strengthening models. This study describes an approach for uniformly dispersing CNTs to enhance the mechanical properties of CNT/Cu composite materials with strong interface bonding and enhancement.
机译：通过湿式混合和火花等离子体烧结成功制造具有高机械性能的碳纳米管增强铜基质（CNT / Cu）复合材料（SPS）。通过SEM，FTIR，拉曼，HR-TEM和拉伸试验表征CNTS酸化时间和CNT含量对复合材料的微观结构和机械性能的影响。具有24小时酸处理的CNT（0.5wt％）并在837 k下烧结的复合材料具有最佳的机械性能，主要源于氧气作为原子瞬变剂以形成固体Cu-CNT界面键合，完整复合材料的致密化和CNT的均匀分散。从密度函数计算，Cu2O-CNT的强接触模式有利于改善机械性能。此外，研究了CNT的不同酸化时间在CNT的增强效果并通过加强模型讨论。该研究描述了一种均匀分散CNT以提高CNT / Cu复合材料的力学性能，具有强界面粘接和增强。

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