Effect of Dysprosia Additive on the Consolidation of CeO2 by Spark Plasma Sintering
The influence of dysprosia addition on the sintering and resulting microstructure of nano‐grained CeO2 ceramics was investigated as functions of the spark plasma sintering parameters. The addition of Dy2O3
(forming a solid solution) resulted in an increase in relative density and a decrease in grain size in sintered samples. The relative density of samples with Dy2O3 content of 6 and 10 mol% was over 95% when sintered at 1050°C
under 500 MPa for holding times as short as 5 min. The application of high pressure facilitated the consolidation to relatively high densities with minimal grain growth. Heating rate and holding time, however, had insignificant effect on density but a measurable effect on grain size.