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Preventing Segregation during Centrifugal Consolidation of Particulate Suspensions: Particle Drafting
Author(s) -
Roeder Ryan K.,
Steinlage Greg A.,
Trumble Kevin P.,
Bowman Keith J.
Publication year - 1995
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1995.tb08670.x
Subject(s) - suspension (topology) , economies of agglomeration , consolidation (business) , materials science , ceramic , particle (ecology) , drag , particle size , particulates , composite material , chemical engineering , metallurgy , mechanics , chemistry , physics , geology , engineering , oceanography , accounting , organic chemistry , business , mathematics , homotopy , pure mathematics
Dilute, dispersed, multicomponent suspensions containing Ce‐ZrO 2 , Al 2 O 3 , and varying Al 2 O 3 ‐platelet contents were centrifugally consolidated. Despite the favorable conditions for segregation, phase and size segregation did not occur in the highest Al 2 O 3 ‐platelet content suspension. The suspension properties did not consist of agglomeration, high solids fractions, or high suspension viscosities typically attributed with segregation prevention. Thus, a new mechanism is suggested, considering the effects of hydrodynamic particle interactions (interference drag or “drafting”) on particle arrangement during consolidation. Particle drafting is proposed and supported as a mechanism for preventing segregation, and the importance of hydrodynamic particle interactions in ceramic processing is discussed.