Abstract In this work, high stability of MgO/carbon nanotube (CNT) interface has been achieved through coating MgO nanoparticles on the surface of CNT via the co-deposition technique. Experimental results indicate that two types of MgO nanoparticles, those are single-crystal and poly-crystal nanoparticles were uniformly coated on the surface of CNT. The oxygen groups on CNT introduced by purification are crucial to the nucleation and growth of MgO nanoparticles on the surface of CNT via the C–O–Mg bonds interaction, and resulting in the formation of MgO/CNT interface in the sample of MgO@CNT. The survived stable interface of MgO/CNT in the long time (22 h) and high intensity ultrasonic vibration (1000 W) treatment, suggests that the MgO/CNT interface has an excellent stability in microstructure. The calculations of work of adhesion for the interface models gives the evidence that MgO nanoparticles can form a strong interfacial bonding with CNT, proving the high stability of the MgO/CNT interface. MgO-coated CNT with high stable interface is suited to act as the reinforcing additive for the matrix of Mg alloy.

中文翻译：

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通过共沉积技术实现MgO/碳纳米管界面的高稳定性

摘要 在这项工作中，通过共沉积技术在 CNT 表面涂覆 MgO 纳米颗粒，实现了 MgO/碳纳米管 (CNT) 界面的高稳定性。实验结果表明，两种类型的MgO纳米颗粒，即单晶和多晶纳米颗粒均均匀地包覆在CNT表面。通过纯化引入的 CNT 上的氧基团对通过 C-O-Mg 键相互作用在 CNT 表面成核和生长 MgO 纳米粒子至关重要，并导致在 MgO@CNT 样品中形成 MgO/CNT 界面. MgO/CNT 界面在长时间（22 小时）和高强度超声振动（1000 W）处理后仍保持稳定，表明 MgO/CNT 界面在微观结构上具有极好的稳定性。界面模型的粘附功计算表明，MgO 纳米粒子可以与 CNT 形成强界面结合，证明 MgO/CNT 界面的高稳定性。具有高稳定界面的MgO包覆碳纳米管适合作为镁合金基体的增强添加剂。