Shear and compressive rheology of aggregated alumina suspensions

✍ Scribed by Glenn M. Channell; Charles F. Zukoski

• Publisher: American Institute of Chemical Engineers
• Year: 1997
• Tongue: English
• Weight: 918 KB
• Volume: 43
• Category: Article
• ISSN: 0001-1541
• DOI: 10.1002/aic.690430707

✦ Synopsis

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, ry , elastic moduli, the strain delimiting the extent of the linear elastic response, and compressive yield stress, Py, 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 (+/+g -1ln, where +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 Py and rv are a function of Poisson S ratio which, for the suspensions investigated, has a value near 0.49.