Synthesis of nanocrystalline aluminum matrix composites reinforced with in situ devitrified Al–Ni–La amorphous particles

Nanocrystalline aluminum matrix composites were synthesized via hot extrusion of cryomilled 5083 Al (Al–4.59Mg–0.57Mn–0.25Fe in wt.%) blended with amorphous Al85Ni10La5 powder. The compression yield strength of the as-extruded composite is 813 and 906 MPa for 10 and 20 vol.% Al85Ni10La5, respectively. The observed thermal stability is discussed in light of the mechanical behavior.