Structure in cohesive powders studied with spin-echo small angle
neutron scattering


Andersson, R. and Bouwman, W.G. and Luding, S. and Schepper, I.M. de (2008) Structure in cohesive powders studied with spin-echo small angle
neutron scattering.
Granular Matter, 10 (6). pp. 407-414. ISSN 1434-5021

open access
Abstract:Extracting structure and ordering information from the bulk of granular materials is a challenging task. Here we present Spin-Echo Small Angle Neutron Scattering Measurements in combination with computer simulations on a fine powder of silica, before and after uniaxial compression. The cohesive powder packing is modeled by using molecular dynamics simulations and the structure, in terms of the density–density correlation function, is calculated from the simulation and compared with experiment. In the dense case, both quantitative and qualitative agreement between measurement and simulations is observed, thus creating the desired link between experiment and computer simulation. Further simulations with appropriate attractive potentials and adequate preparation procedures are needed in order to capture the very loose-packed cohesive powders.
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Additional information:Open Access
Copyright:© 2008 The Author(s)
Engineering Technology (CTW)
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