J.M. Mendoza-DuarteI. Estrada‐GuelFrancisco C. Robles HernándezC. Carreño-GallardoC. López-MeléndezR. Martínez-Sánchez2026-03-222026-03-22201610.1590/1980-5373-mr-2015-0625https://doi.org/10.1590/1980-5373-mr-2015-0625https://andeanlibrary.org/handle/123456789/47719Citaciones: 13The present work deals with the study of some aluminum (Al) composites reinforced with metallized-graphite (MG) particles prepared by mechanical milling and powder metallurgy routes. Density, morphology evolution and mechanical performance of composites were investigated as a function of MG concentration and milling time. The as-milled powders were characterized by X-ray diffraction and optical/electron microscopy; meanwhile, the mechanical testing was carried out on cylindrical specimens prepared from powders by powder metallurgy. Evidence reveals that high-energy ball milling induce a homogeneous dispersion of graphite nanoparticles in the Al matrix; this is related to an enhancement of hardness and strength response of studied composites. The composite sample with 0.5% MG addition (in weight) reached an increase of 40% on hardness and 50% on strength (compared with pure Al sample); nevertheless an adverse effect was observed with longer milling and/or higher MG concentration.enMaterials sciencePowder metallurgyBall millNanocompositeGraphiteComposite materialComposite numberAluminiumMicrostructureDispersion (optics)article