Plastic flow of saturated alumina powder compacts: Pair potential and strain rate

AFM interaction study of α-alumina particle and c-sapphire surfaces at high-ionic-strength electrolyte solutions

“…The rheology of slurry and powder compact are directly related to the normal and frictional forces between particles [11]. While the normal force quantifies how much the particles in the suspension approach each other, the frictional force quantifies the flow of particles over one another.…”

Plasticity and Fracture in Drying Colloidal Films

“…Since this ratio is of order one it also suggests a simple way to control film fracture, by decreasing particle adhesion: here a small change to 0 = Y should significantly change the plastic dissipation, increasing G C . Indeed, a brittleto-plastic transition of this nature has been observed in colloidal alumina [30], when particle adhesion was varied by changing the surface chemistry. A similar transition would be predicted if the dispersant was replaced with one whose index of refraction more closely matched that of the particles, lowering A.…”

“…For surfaces in intimate contact, s is taken to be an atomic length scale [28]. This model has been successfully tested in a broad range of situations, including variations in particle size [31], volume fraction [28], chemical environment [29,30], and consolidation pressure [31].…”

“…The yielding behavior of aggregated colloidal dispersions is well studied (e.g., Refs. [28][29][30][31][32]). For an aggregated particle network, the yield stress Y is predicted to be…”

Plastic Flow of Saturated, Consolidated Alumina Powder Compacts: Particle Size and Binary Mixtures

“…17 This observation provides additional evidence for the hypothesis 11 that both behaviors are produced by the same phenomena. To produce the same force between two large particles in a body, as compared to two small particles in a similar body, less applied stress (or pressure) is required.…”