Alloying is an important method to improve the mechanical properties of beryllium-aluminum composites. In this study, two kinds of beryllium-aluminum composites with and without Li were prepared by pressure impregnation method and extrusion, and the effects of Li on the microstructure and mechanical properties of beryllium-aluminum alloy were investigated by XRD, SEM and tensile test. The results show the addition of Li enhances the absorption of oxygen and nitrogen in the alloy
however, there is no significant change in the material's density, which remains at 2.07 g/cm