Powder metallurgy and hardness of the Ll-10Mg alloy reinforced with carbon nanotubes

In this work, the multi-walled carbon nanotubes (MWCNTs) were purified with an acid treatment and subsequently dispersed using ultrasound a nonionic surfactant solution of ethoxylated lauric alcohol 7 moles ethylene oxide (E7E). Then, (CNTs) used as reinforcement phase (0.4 wt.% 0.8 wt.%) in Al- 10Mg alloy. The high-energy ball milling was employed for nanocomposites processing, resulting powders consolidate by uniaxial pressure. Measurements Vickers microhardness, nanohardness, displacement, Young's modulus carried out on compacts. samples analyzed scanning electron microscopy (SEM), X-ray diffraction (XRD), ultraviolet-visible spectroscopy (UV-Vis), Fourier-transform infrared (FT-IR), Raman (RS). Good dispersion MWCNTs achieved 0.5 mg/ml E7E surfactant. CNTs Al-10Mg matrix 0.25 h milling. After compaction, Al-10Mg/0.4MWCNTs nanocomposite presented microhardness 190 HV, nanohardness 3.5 GPa, 116 GPa.