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Flowability assessment of weakly consolidated powders

Radjai, F., Stavrou, Alexandros Georgios, Hare, Colin, Hassanpour, Ali, Wu, Chuan-Yu, Nezamabadi, S., Luding, S. and Delenne, J.Y. (2017) Flowability assessment of weakly consolidated powders In: Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media, 03-07 Jul 2017, Montpellier, France.

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The inability of cohesive powders to flow consistently and reliably is a major cause of process downtime and reduced efficiency across a wide range of powder processing industries. Most methods to assess powder flowability fail at low consolidation pressures (<1 kPa). In this paper, the ball indentation technique is used to assess the flow behaviour of two powders at low stresses by determining the bed hardness. In parallel, the powders are subjected to shear testing in a range of high stresses, with the derived unconfined yield strength used, along with the indentation hardness to define the constraint factor (C). By using the latter, which is considered independent of the preconsolidation stress applied, the unconfined yield strength of the powders at low stresses are inferred from the penetration hardness measurements.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
Radjai, F.
Stavrou, Alexandros Georgios
Hassanpour, Ali
Nezamabadi, S.
Luding, S.
Delenne, J.Y.
Date : 30 June 2017
DOI : 10.1051/epjconf/201714003085
Copyright Disclaimer : © The Authors, published by EDP Sciences, 2017. This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Depositing User : Clive Harris
Date Deposited : 23 Aug 2017 09:01
Last Modified : 16 Jan 2019 18:55

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