The physical-mechanical properties of aluminum nanocomposites produced by high energy explosion impact

Abstract

The present paper uses explosion compacting of Al nanoparticies to create light nanocomposite with increased physico-mechanical properties. Russian civil explosive Uglenit was chosen as high energy material for compacting. The formation of the structure and properties of aluminum based materials after shock-wave impact was studied. It was found that shock-wave treatment of different samples a) aluminum powder and b) powder mixtures Al +10 wt.% C (in the form of detonation diamonds) and c) Al +10 wt.% Al2O3 produces nanostructed materials with almost the theoretical density. X-ray diffraction analysis showed that in the samples with the addition of carbon and aluminum oxide was formed two-phase state of aluminum with a significantly different structure parameters. In this case, the lattice parameter of nanophase increased by 0.5%, which testifies to its non- equilibrium state. This increase of the parameter may be due to compressive stress, evaluation of which gives the value of 350 MPa. It was shown that the materials have high values of mechanical properties - hardness, compressive yield strength. Copyright © 2014 by The Minerals, Metals & Materials Society.