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Study on Rheological Properties of SiC Slurry by Slip-casting Process

Wei Zhang

Abstract

Surface modification of submicron SiC powders was carried out by carboxymethyl cellulose(CMC),and the effects of the amounts of CMC and pH value on the rheological behavior of concentrated aqueous SiC suspensions were analyzed by sedimentation and viscosity tests,and then the suspensions were slip-casted.The results showed that the viscosity of slurry made of modified SiC powder being improved,while the stability has increased distinctly.The solids percent in volume is up to 60%,meeting the demand of slip-casting.

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Key concepts: Materials science, Rheology, Slurry, Carboxymethyl cellulose, Slip (aerodynamics), Viscosity, Composite material, Apparent viscosity