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A new x-ray computed tomography technique for mapping 3 dimensional variations of packing density in suspension processed green ceramics is introduced. The technique is used to measure the drained compressibility of two ceramic suspensions prepared at different extremes of interparticle potential: a strongly flocculated suspension and a weakly flocculated, salt coagulated suspension. Regions of low and high effective stress in both samples are then explored with the computed tomography technique. Both the spatial and statistical differences in microstructurai features of both samples reveal unexpected trends in homogeneity. Introduction Consolidating dilute suspensions into dense, homogeneous ceramic green bodies is the basis for colloidal processing of ceramics. Since microstructurai heterogeneities during the formation of the green body can ultimately lead to cracks and warpage during the final stages of processing, microstructurai uniformity must be carefully controlled during the

New x-ray nondestructive evaluation techniques for studying microstructural homogeneity of green ceramics