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Cottrino, S., Jorand, Y., Maire, E. and Adrien, J. (2013) Characterization by X-Ray Tomography of Granulated Alumina Powder during in Situ Die Compaction. Materials Characterization, 81, 111-123.
https://doi.org/10.1016/j.matchar.2013.04.004

has been cited by the following article:

• TITLE: Green Microstructural Visualization of Dry-Pressed Spray-Dried Alumina (Al2O3)

  AUTHORS: Ian P. Maher, Richard A. Haber

  KEYWORDS: Spray-Dried Alumina, Uniaxial Dry-Pressing, SEM, Green Microstructural Imaging

  JOURNAL NAME: Materials Sciences and Applications, Vol.9 No.12, November 15, 2018

  ABSTRACT: Slurry parameters were controlled prior to spray-drying to visualize and govern an understanding of which parameters govern hollow coring and granule morphology during spray-drying. An aqueous alumina using a polyvinyl alcohol binder (PVA) system was analyzed and granules were processed by altering the slurry specific gravity and viscosity value prior to spray-drying. Spray-dried granules were uniaxial dry-pressed at varying moisture contents to show the plasticizing effects of moisture during compaction. A novel characterization method using a field emission electron microscope (FESEM) was implemented to image the green microstructures of the granules and compacted samples. Slurries with a higher specific gravity and viscosity resulted in denser granules with spherical shapes. Viscosity affected the binder segregation during the spray-drying process. Granules stored at higher moisture contents resulted in denser compacts with fewer intergranular pores and cracks along granule boundaries. Using a FESEM resulted in higher resolution for green microstructural characterization.