Effect of Dysprosia Additive on the Consolidation of CeO₂ by Spark Plasma Sintering

Authors

Kwanghoon Choi, University of California - Davis
Richard E. Reavis, Boise State University
Daniel D. Osterberg, Boise State University
Brian J. Jaques, Boise State UniversityFollow
Darryl P. Butt, Boise State UniversityFollow
Robert D. Mariani, Idaho National Laboratory
Douglas E. Burkes, Idaho National Laboratory
Zuhair A. Munir, University of California - Davis

Document Type

Article

Publication Date

5-1-2012

Abstract

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.

Publication Information

Choi, Kwanghoon; Reavis, Richard E.; Osterberg, Daniel D.; Jaques, Brian J.; Butt, Darryl P.; Mariani, Robert D.; Burkes, Douglas E.; and Munir, Zuhair A.. (2012). "Effect of Dysprosia Additive on the Consolidation of CeO₂ by Spark Plasma Sintering". Journal of the American Ceramic Society, 95(5), 1524-1529. https://doi.org/10.1111/j.1551-2916.2011.05054.x