https://cimav.repositorioinstitucional.mx/ 1 Dispersion of silicon carbide nanoparticles in a AA2024 aluminum alloy by a high-energy ball mill C. Carreño-Gallardo, I. Estrada-Guel, C. López-Meléndez, R. Martínez-Sánchez Abstract Al2024 alloy was reinforced with silicon carbide nanoparticles (SiCNP), whose concentration was varied in the range from 0 to 5 wt.%; some composites were synthesized with the mechanical milling (MM) process. Structure and microstructure of the consolidated samples were studied by X-ray diffraction and transmission electron microscopy, while mechanical properties were investigated by compressive tests and hardness measurements. The microstructural evidence shows that SiCNP were homogeneously dispersed into the Al2024 alloy using high-energy MM after 2 h of processing. On the other hand, an increase of the mechanical properties (yield stress, maximum strength and hardness) was observed in the synthesized composites as a direct function of the SiCNP content. In this research several strengthening mechanisms were observed, but the main was the obstruction of dislocations movement by the addition of SiCNP. Keywords Aluminum alloy; SiC; Mechanical alloying; Composites 1. Introduction Particle-reinforced metal matrix composites (MMCs) exhibit improved mechanical and physical properties which combine the advantages of both the matrix and the reinforcing materials. Although various metals have been studied as matrix materials, aluminum alloys have been used as the matrix materials in most of