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Shear and compressive rheology of aggregated alumina suspensions
Author(s) -
Channell Glenn M.,
Zukoski Charles F.
Publication year - 1997
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690430707
Subject(s) - rheology , shear (geology) , composite material , materials science , compressive strength , shear rate
The shear and compressive properties of aggregated alumina particles are determined as functions of volume fraction and the strength of the interparticle attraction. Over a range of volume fractions, yield stresses, τ y , elastic moduli, the strain delimiting the extent of the linear elastic response, and compressive yield stress, P y , are well described by power‐law functions of volume fraction, while the role of interparticle attractions can be accounted for by expressing these mechanical properties as (ϕ/ϕ g − 1) n , where ϕ g captures the strength of particle attractions and n the microstructure. The links between compressive and shear properties are well described by linear elastic models where the P y and τ y are a function of Poisson's ratio which, for the suspensions investigated, has a value near 0.49.