Shear bands and the evolving microstructure in a drying colloidal film studied with scanning µ-SAXS.

ABSTRACT: Shear localisation in thin bands is an important process involved in the plastic deformation of materials subject to stress. This process is often sensitive to the sample microstructure (amorphous/crystalline). Here we show using the scanning µ-SAXS technique, how these different microstructures influence the plastic deformations in a drying colloidal film. In crystalline samples, the presence of an ordering transition at the compaction front was directly identified through the development of a six-fold symmetry in the scattering pattern in 20 wt% samples. It is shown that plastic deformations in individual groups of particles during the compaction process can be tracked and measured in real time. Higher concentration suspensions were found to result in amorphous structures. The transition

SUBMITTER: Yang B 

PROVIDER: S-EPMC6113273 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature