Effect of CNT on the Powder Morphology and Particle Size of Nano-TiO2 Reinforced Aluminum Matrix Composites During High-energy Ball Milling
CAO Mingkai1,2, LIU Yin2, ZAN Yuning2, WANG Dong2, WANG Quanzhao2, XIAO Bolyu2, MA Zongyi2, WANG Wenguang1,2,*
1 School of Mechanical Engineering, Liaoning Petrochemical University, Fushun 113001, Liaoning, China 2 Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Abstract: In this work, under consistent conditions of a ball-to-powder ratio (15∶1) and a constant rotational speed (220 r/min), composite powders of 4wt%TiO2/Al, (4wt%TiO2+1.5vol%CNT)/Al, and (4wt%TiO2+3vol%CNT)/Al were prepared via variations in milling duration. Subsequent to milling, analytical methods including X-ray diffraction (XRD), optical microscopy (OM), scanning electron microscopy (SEM), and laser particle size analysis were employed to inspect the distribution of the reinforcements within the milled powders, as well as to discern morphological and particle size discrepancies among them. The experimental findings suggest that high-energy ball milling can effectively disperse CNT evenly throughout the aluminum matrix. CNT can augment the strengthening of aluminum powder and inhibit cold welding, resulting in a substantial acceleration of the ball milling process and advancement of powder refining. Moreover, when compared at equivalent milling durations, 4wt%TiO2/Al powder showed flake morphology during ball milling for 7—9 h, and (4wt%TiO2+1.5vol%CNT)/Al and (4wt%TiO2+3vol%CNT)/Al showed granular morphology during ball milling for 7—9 h, the composite powders incorporating a blend of nanoscale TiO2 and carbon CNT as reinforcements exhibited a more spherical morphology and smaller particle sizes, as opposed to the powder containing only TiO2.
曹茗凯, 刘崟, 昝宇宁, 王东, 王全兆, 肖伯律, 马宗义, 王文广. 高能球磨过程中CNT对纳米TiO2增强铝基复合材料粉末形貌及粒径的影响[J]. 材料导报, 2025, 39(18): 24070186-6.
CAO Mingkai, LIU Yin, ZAN Yuning, WANG Dong, WANG Quanzhao, XIAO Bolyu, MA Zongyi, WANG Wenguang. Effect of CNT on the Powder Morphology and Particle Size of Nano-TiO2 Reinforced Aluminum Matrix Composites During High-energy Ball Milling. Materials Reports, 2025, 39(18): 24070186-6.
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2025, Vol. 39 
