高能球磨过程中CNT对纳米TiO<sub>2</sub>增强铝基复合材料粉末形貌及粒径的影响

doi:10.11896/cldb.24070186

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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.

Key words： high energy ball milling aluminum matrix composite powder morphology milling time

Published: 25 September 2025 Online: 2025-09-11

CLC number:

TB331

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	Articles by authors
	CAO Mingkai
	LIU Yin
	ZAN Yuning
	WANG Dong
	WANG Quanzhao
	XIAO Bolyu
	MA Zongyi
	WANG Wenguang

Cite this article:

CAO Mingkai,LIU Yin,ZAN Yuning, et al. Effect of CNT on the Powder Morphology and Particle Size of Nano-TiO₂ Reinforced Aluminum Matrix Composites During High-energy Ball Milling[J]. Materials Reports, 2025, 39(18): 24070186-6.

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https://www.mater-rep.com/EN/10.11896/cldb.24070186 OR https://www.mater-rep.com/EN/Y2025/V39/I18/24070186

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