Effect of Nanosize Strengthening Particles on the Structure of Aluminum-Based Composite Materials

Resumo

The article is devoted to studying the effect of introduced strengthening nanosize particles on composite material (CM) structure. The nature of strengthening particle distribution, the distance between dispersed particles, and the size of a critical nucleus are determined. It is shown that use of centrifugal forces in a crystallizing field provides uniform particle distribution within a matrix with predominant arrangement of particles within grains. The critical nucleus radius determined during crystallization in a centrifuge of CM based on aluminum shows that the critical nucleus radius is close to that of strengthening nanoparticles. A version is proposed for production parameters making it possible to obtain a critical nucleus with a size markedly greater than that of added particles.