Bartels, Guido; Unger, Tamas; Kadau, Dirk; Wolf, Dietrich; Kertesz, Janos:

The effect of contact torques on porosity of cohesive powders

In: Granular matter, Jg. 7 (2005) ; Nr. 2-3, S. 139-143
ISSN: 1434-7636, 1434-5021
Zeitschriftenaufsatz / Fach: Physik
The porosity of uniaxially compacted cohesive
powders depends on the applied stress (including gravity).
The case, where these stresses are weak, is considered. The
compaction results in a porosity which is a function of sliding,
rolling and torsion friction. By contact dynamics simulations
it is shown that the influences of contact torques (static
rolling and torsion friction) on the porosity are significant
and approximately additive. The relevance for nano-powder
pressure sintering is discussed.