The effect of contact torques on porosity of cohesive powders

Guido Bartels*, Tamás Unger, Dirk Kadau, Dietrich E. Wolf, János Kertész

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract (may include machine translation)

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.

Original languageEnglish
Pages (from-to)139-143
Number of pages5
JournalGranular Matter
Volume7
Issue number2-3
DOIs
StatePublished - Jul 2005
Externally publishedYes

Keywords

  • Cohesive powders
  • Contact dynamics simulations
  • Contact torques
  • Granular compaction

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