Jump to main content
Jump to site search


Effect of particle packing and density on shock response in ordered arrays of Ni + Al nanoparticles

Author affiliations

Abstract

We investigate the shock response of Ni + Al reactive nanoparticle systems through molecular dynamics simulations. The powder configurations with varying arrangements and densities are constructed by stacking equal-sized Ni and Al particles based on five typical crystal structures, i.e., zinc-blende, NaCl, CsCl, AuCu and the close-packed. The effects of configuration and shock strength on mechanochemical and diffusion processes in the shock-induced chemical reactions are characterized. A reaction kinetic model is developed to describe these behaviors, assess the extent of mechanochemical effect, and explain the occurrence of ultra-fast reaction. Significant dependence of shock wave velocity, plastic deformation, temperature response, chemistry and microstructure change on particle packing and density is observed under shock loading at the same piston velocity, but we see a relatively weak dependency on the stacking mode with the same density. Our results indicate the important role of particle coordination number and density in shock response of energetic powder materials.

Graphical abstract: Effect of particle packing and density on shock response in ordered arrays of Ni + Al nanoparticles

Back to tab navigation

Publication details

The article was received on 18 Oct 2018, accepted on 02 Jan 2019 and first published on 05 Jan 2019


Article type: Paper
DOI: 10.1039/C8CP06497K
Citation: Phys. Chem. Chem. Phys., 2019, Advance Article
  •   Request permissions

    Effect of particle packing and density on shock response in ordered arrays of Ni + Al nanoparticles

    Y. Xiong, X. Li, S. Xiao, H. Deng, B. Huang, W. Zhu and W. Hu, Phys. Chem. Chem. Phys., 2019, Advance Article , DOI: 10.1039/C8CP06497K

Search articles by author

Spotlight

Advertisements