Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2009-11-06
Journal of the European Ceramic Society 28 [7], 1443-1449 (2008)
Physics
Condensed Matter
Soft Condensed Matter
7 pages, 9 figures
Scientific paper
10.1016/j.jeurceramsoc.2007.12.0
The macroscopic mechanical properties of densely packed coagulated colloidal particle gels strongly depend on the local arrangement of the powder particles on length scales of a few particle diameters. Heterogeneous microstructures exhibit up to one order of magnitude higher elastic properties and yield strengths than their homogeneous counterparts. The microstructures of these gels are analyzed by the straight path method quantifying quasi-linear particle arrangements of particles. They show similar characteristics than force chains bearing the mechanical load in granular material. Applying this concept to gels revealed that heterogeneous colloidal microstructures show a significantly higher straight paths density and exhibit longer straight paths than their homogeneous counterparts.
Aste Tomaso
Filser Frank T.
Gauckler Ludwig J.
Schenker Iwan
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