Consolidation of 2124 Aluminum Alloy – Carbon Nanotube Reinforced Metal Matrix Composites

Abstract:

Powder metallurgy techniques have emerged as a promising way for the fabrication of nanotube reinforced metal matrix composites. The present study reports on the investigation of the optimum consolidation conditions that give the best mechanical properties, for different carbon nanotubes weight percentages and extrusion ratios, while minimizing any chemical interfacial reactions between the matrix and the reinforcements. The conditions investigated were hot compaction followed by hot extrusion, cold compaction followed by hot extrusion, and hot compaction followed by cold extrusion. The tensile behaviors for samples of the three processing conditions were evaluated and compared. An increase in the yield strength of the carbon nanotubes CNT composites under most conditions were observed. The highest strength values for composites were obtained using the hot compaction/cold extrusion route at extrusion ratio 4:1, on the expense of the ductility. Better strength values were obtained for the hot compaction/hot extrusion route at higher extrusion ratio of 5:1 with restoring good ductility.

• Periodical: Advanced Materials Research (Volume 748)
• Pages: 28-31
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.748.28
• Online since: August 2013
• Authors: M.M. Emara
• Keywords: Carbon Nanotube (CN), Extrusion Ratio, Metal Matrix Composite (MMC), Powder metallurgy, Wt. %

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