The influence of nickel on the mechanical and tribological properties of AA2219-CNT composites made by stir casting

AA2219 aluminium alloy matrix composite enhanced with CNTs(Carbon nanotubes) was investigated for its mechanical and tribological properties. Stir casting was used to add nickel to the aluminium matrix, and the homogenization procedure was then used to homogenise the mixture. It was found that the interdimeric portions of the interdimeric CNT and aluminium compounds had a block-shaped structure. There was an increase in tiny needle-shaped Aluminum precipitates near interdimeric zones when nickel was added up to 1.5 wt%; additional nickel addition reduced their abundance in this location. It was found that the needle-shaped Carbon Interdimeric nanotube precipitates disappeared following normalisation treatment with nickel up to 4.5 wt%. Ni and CNT intermetallic were converted to CNT by adding nickel and homogenization. Furthermore, the aluminium matrix generated aluminium precipitates instead of al-Ni precipitates when nickel concentration increased from 3 to 4.5 wt%. Composite's coefficient of friction and wear rate were lowered by 13 percent and 12 percent compared to a control sample without nickel, while its strength was increased by roughly 42 percent.