This paper considers a process of explosive compaction of Al nanoparticles to create aluminum-based composites with increased physical and mechanical properties. The improvements of composite properties were obtained by the introduction of nanodiamonds and alumina nanoparticles (10 wt%. of each) into the mixture of aluminum nanopowder. As a result of theoretical consideration of the shockwave compaction for powder mixtures, we offered and discussed the conditions of explosive compaction.
The compaction process can be characterized by a set of values of the shockwave pressure which define powder compaction, deformation, and particle heating. These values are: 1. minimum shockwave pressure P1 under which the compaction and the shockwave in the powder do not occur; 2. pressure P2 under which there is a jet cleaning of the particle surface; 3. pressure P3 that will result in a homogeneous compact with maximum density; 4. pressure P4 under which particles will melt. Our research presents the result of calculations of the pressure limits for nanodiamonds, aluminum oxide, aluminum, and their mixtures.
compaction, composite materials, aluminum, nanopowders, shockwave impact