Effect of Small Additions of Alumina Nanoparticles on the Strength Characteristics of an Aluminum Material

Abstract

New data were obtained on the effect of small additions of nanoparticles on the mechanical properties of a metal matrix produced by cold pressing of powders with subsequent sintering in a forevacuum. The matrix was a sintered aluminum powder or aluminum–1.5 vol % copper powder mixture. The strengthener was alumina nanoparticles at concentrations of 0.01–0.15 vol %. It was shown that the strength characteristics of these materials as determined by tensile, compressive, and flexural testing and by the offset yield strength method are significantly higher.