Carbon nanotubes (CNTs) are noteworthy, as they reinforce the metallic matrix, due to mechanical properties, such as the ~ 1.0 TPa Young module. To improve the maintenance of the commercially pure aluminum surface, multi-walled carbon nanotubes were incorporated into the aluminum surface with heat treatment by solid solubilization, in order to improve the surface properties of aluminum. The aluminum samples were chemically attacked for 30, 60 and 120 s and placed in a container with CNTs, being subjected to a temperature of 640 °C for 1 h. Then, the roughness was evaluated by a roughness meter for morphology in the scanning electron microscopy. An intensity of aggregation of CNTs was evaluated by XRD, and the Raman Spectra has evaluated the transfer of charge to the matrix. Microhardness was performed to evaluate the influence of the incorporation of CNTs in the matrix. The results obtained show that the incorporation of CNTs in the aluminum matrix increases the hardness in approximately 20% of the surface, in comparison with the control sample. The process of incorporating CNTs into the aluminum matrix by solubilization is a promising, simple and inexpensive alternative to improve the durability of the aluminum surface.

Graphic Abstract

中文翻译：

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碳纳米管通过增溶处理增强铸铝表面

碳纳米管（CNT）值得一提，因为它们具有机械特性，例如〜1.0 TPa的杨氏模量，可增强金属基质。为了改善对商业上纯净的铝表面的维护，将多壁碳纳米管掺入到铝表面中，并通过固溶处理进行热处理，以改善铝的表面性能。将铝样品化学腐蚀30 s，60 s和120 s，并将其放置在具有CNT的容器中，并在640°C的温度下放置1 h。然后，通过粗糙度计对粗糙度进行扫描电子显微镜检查。CNT的聚集强度通过XRD评估，拉曼光谱评估了电荷向基质的转移。进行显微硬度以评估在基体中掺入CNT的影响。所获得的结果表明，与对照样品相比，在铝基质中掺入CNT可提高表面约20％的硬度。通过增溶将CNTs掺入铝基体中的方法是改善铝表面耐久性的一种有前途的，简单且廉价的替代方法。

图形摘要