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

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...

Stress, strain, and bulk microstructure in a cohesive powder

Spin-echo small-angle neutron scattering is able to characterize powders in terms of their density density correlation function. Here we present a microstructural study on a fine cohesive powder undergoing uniaxial compression. As a function of compression, we measure the autocorrelation function of the density distribution. From these...