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Project IMPACT08
Research Area Materials Science
Principal Investigator(s) Prof. Kai Nordlund
  • University of Helsinki, Department of Physics, Finland


The aim of the study will be to detect cracking and shock wave induced strengthening/weakening of materials upon hypervelocity nanoparticle impact using large-scale molecular dynamics simulations. Nanoparticle impacts occur, for instance, in space where small meteoroids hit surfaces of planets, moons, and spacecraft. They are also important in industrial processing of surfaces when cluster ion beams are used. In our recent study it was shown that transition to macroscopic cratering behaviour occurs already at very small impactor sizes (impactor diameters less than 20 nm). The next step that will be taken in this study, is to find out whether also the macroscopic cracking mechanisms occur at this size regime.

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