Fabrication of Al7075-Mwcnt Composite Powder By Recycling Aluminum Alloy Chips Via High Energy Milling and Alloying

In this study, aluminum chips were milled in a planetary ball mill at different times and ball-to- powder weight ratios (bprs). the resulting optimum powder was reinforced with 1 wt% and 2 wt% of multi-walled carbon nanotubes (mwcnts). the effects of alloying time, bpr, and mwcnts percentage on the morphology, distribution, and composition of the al7075-mwcnt powder were investigated. the results showed that smaller particles with a limited size distribution can be obtainable by increasing bpr and decreasing mechanical milling time. a uniform dispersion of reinforcement (2 wt%) was achieved at lower alloying times (15 and 30 min) and a higher bpr (20:1). using xrd analysis, it was revealed that the carbon peaks are more clearly in 2%-mwcnt powders than 1%-mwcnt ones. the addition of mwcnts led to reducing the particle size; this is confirmed by the data obtained from the xrd patterns and their analysis with the williamson-hall model. machining chips were converted into composite powder by cost-effective mechanical milling and alloying method with a uniform distribution of mwcnts, which is unique.