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Effect of Dysprosia Additive on the Consolidation of CeO 2 by Spark Plasma Sintering
Author(s) -
Choi Kwanghoon,
Reavis Richard E.,
Osterberg Daniel D.,
Jaques Brian J.,
Butt Darryl P.,
Mariani Robert D.,
Burkes Douglas E.,
Munir Zuhair A.
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.05054.x
Subject(s) - spark plasma sintering , sintering , consolidation (business) , microstructure , relative density , grain size , materials science , ceramic , grain growth , analytical chemistry (journal) , mineralogy , metallurgy , chemistry , chromatography , business , accounting
The influence of dysprosia addition on the sintering and resulting microstructure of nano‐grained CeO 2 ceramics was investigated as functions of the spark plasma sintering parameters. The addition of Dy 2 O 3 (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 Dy 2 O 3 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.