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Modelling Powder Compaction and Mixture Laws
Author(s) -
Lamy Peggy,
Brunet Luc,
Erre René,
Stempfer Berthe
Publication year - 2003
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.200300015
Subject(s) - cohesion (chemistry) , compaction , compressibility , materials science , index of dispersion , mixing (physics) , dispersion (optics) , mathematics , mechanics , composite material , physics , poisson regression , population , demography , quantum mechanics , sociology , optics
Abstract The purpose of this paper is related to the improvement of the manufacturing processes of pyrotechnic compositions by determining the relative influence of physical properties on the compressibility and the cohesion. The Heckel‐Gonthier four parameter model is used to assess the powder compressibility. This relationship is generally applied to the compression of pharmaceutical powders, but we show a good correlation with the behaviour of pyrotechnic compositions. The compact cohesion is assessed by the cohesion index and the breaking resistance. This study demonstrates that the mean diameter, generally used as a parameter to describe the particle size, is less reliable than the dispersion index. This approach makes it possible to formulate mixing behaviour laws that can reduce the required number of experiments to assess a new composition.