Optimization of Al6061 Nanocomposites Production Reinforced with Multiwalled Carbon Nanotubes

• Type: Article in International Scientific Journal
• Date: 2024

Authors

Monteiro, B (Author) Other; Simoes, S (Author) FEUP

Journal

The Journal is awaiting validation by the Administrative Services.

Title: Journal of Composites Science

Vol. 8

Final page: 381

ISSN: 2504-477X

Publisher: Multidisciplinary Digital Publishing Institute (MDPI)

Indexing

ISI Web of Knowledge - 0 Citations

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Other information

Authenticus ID: P-017-3Y6

DOI: 10.3390/jcs8090381

Abstract (EN): This study investigates the impact of multi-walled carbon nanotubes (MWCNTs) on the microstructure and mechanical properties of Al6061 nanocomposites. The MWCNTs were uniformly dispersed in the aluminum alloy matrix using ultrasonication following cold pressing and sintering in a vacuum. The effect of the sintered temperature on the microstructure and mechanical properties of the nanocomposites was evaluated. The addition of MWCNTs resulted in grain refinement, with the nanocomposites exhibiting smaller and more uniformly distributed grains than the pure Al6061 matrix, particularly at lower sintering temperatures of 580 and 600 degrees C. The nanocomposites also demonstrated an increase in hardness, with peak values observed at 580 degrees C, primarily due to the effective dispersion of MWCNTs, which restrict dislocation movement and reinforce grain boundaries. While higher sintering temperatures led to significant grain growth and less uniform hardness distribution, lower temperatures favored finer grain structures and more homogeneous hardness profiles. The results suggest that the optimal sintering temperature for achieving the best balance between microstructure and mechanical properties is 580 degrees C. However, the study also highlights the need for optimized dispersion techniques to achieve a more uniform distribution of MWCNTs.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14