Technological and strength properties of silumin modified by silicon dioxide nanoparticles

Аннотация

The eutectic silumin modified by SiO₂ nanoparticles is fabricated and studied. The sizes of particles and their concentration in the melt are varied. The strength of the silumin is found to complexly depend on the SiO₂ nanopowder particle size. The noticeable increase in the hardness during heat treatment of the nanomodified silumin is mainly related to Guinier–Preston zones, and the contribution of grain refinement (precipitation hardening) is insignificant.