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

Journal Article · Tue May 01 00:00:00 EDT 2012 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1551-2916.2011.05054.x· OSTI ID:1045494

Choi, K; Reavis, R E; Osterberg, D D; Jacques, B J; Butt, D P; Mariani, R D; Burkes, D E; Munir, Z A

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 (SPS) parameters. The addition of Dy2O3 (forming a solid solution) resulted in an increase in relative density and a decrease in grain size. 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 minutes. 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.

• Research Organization: Idaho National Lab. (INL), Idaho Falls, ID (United States)
• Sponsoring Organization: DOE - NE
• DOE Contract Number: DE-AC07-05ID14517
• OSTI ID: 1045494
• Report Number(s): INL/JOU-11-22991; JACTAW; TRN: US1203626
• Journal Information: Journal of the American Ceramic Society, Vol. 95, Issue 5; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
ADDITIVES
CERAMICS
GRAIN GROWTH
GRAIN SIZE
HEATING RATE
MICROSTRUCTURE
PLASMA
SINTERING
SOLID SOLUTIONS
Doped Ceria
Dysprosia
Sintering
SPS