Bulk flow properties of sieved samples of a ceramic powder at ambient and high temperature

The flow properties of five samples of a ceramic powder, characterized by different particle size distributions were measured at ambient temperature and at 500°C with the High Temperature Annular Shear Cell. A significant increase of powder cohesion was observed at high temperature. A model combinin...

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Bibliographic Details
Published in:Powder technology 2016-01, Vol.288, p.379-387
Main Authors: Chirone, Roberto, Barletta, Diego, Lettieri, Paola, Poletto, Massimo
Format: Article
Language:English
Subjects:
High temperature
Interparticle forces
Powder cohesion
Powder flow properties
van der Waals forces
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Summary:The flow properties of five samples of a ceramic powder, characterized by different particle size distributions were measured at ambient temperature and at 500°C with the High Temperature Annular Shear Cell. A significant increase of powder cohesion was observed at high temperature. A model combining a continuum approach and a particle–particle interaction description was used to correlate the powder tensile strength with the interparticle forces. The dependence of the tensile strength on powder consolidation and temperature is correctly described by the model. [Display omitted] •A High Temperature Annular Shear Cell was used with ceramic powders.•Powder flow properties were measured at ambient temperature and at 500°C.•The combined effect of particle size and temperature was assessed.•A model was used to relate powder tensile strength to interparticle forces.•The model correctly describes the effect of consolidation and temperature.
ISSN:0032-5910
1873-328X
DOI:10.1016/j.powtec.2015.11.040