Abstract Uniform dispersion of carbon nanotube (CNT) and strong interface combination between nano‑carbon reinforcement and metal matrix are of extremely importance to fabricate CNT/metals composite by powder metallurgy method due to the hereditary effects. Therefore, in this paper, CNT/Cu composite powder was fabricated through Spray Pyrolysis (SP) to improve the dispersity and interface property. Nucleation and growth of Cu grains on the CNT surface occurred in the ultrasonic atomization of acetate (Cu(CH3COO)2·H2O) solution droplets with mono-dispersed CNT. The microstructures of composite powder were investigated by TGA, Raman, XRD, FESEM and TEM analysis methods. Results show that structural integrity and purity of CNT can be enhanced by SP process at 500 °C. And CNT/Cu composite powder with uniform dispersion and good combination between CNT and Cu particles could be obtained by SP even though high composition of CNT was added. At last, the mechanisms of nucleation and growth were estimated based on the microstructure analysis.

中文翻译：

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SP法制备分散均匀、界面结合力强的CNT/Cu纳米复合粉体

摘要 由于遗传效应，碳纳米管 (CNT) 的均匀分散和纳米碳增强材料与金属基体之间的强界面结合对于通过粉末冶金法制备 CNT/金属复合材料极为重要。因此，在本文中，通过喷雾热解 (SP) 制备 CNT/Cu 复合粉末以提高分散性和界面性能。Cu颗粒在CNT表面的成核和生长发生在具有单分散CNT的乙酸盐(Cu(CH3COO)2·H2O)溶液液滴的超声雾化中。通过TGA、拉曼、XRD、FESEM和TEM分析方法研究了复合粉末的微观结构。结果表明，500°C 的 SP 工艺可以提高 CNT 的结构完整性和纯度。即使加入高含量的CNT，也可以通过SP获得分散均匀且CNT与Cu颗粒结合良好的CNT/Cu复合粉末。最后，基于微观结构分析估计了成核和生长的机制。