Microstructure development during sintering of nanocrystalline tetragonal zirconia

A.J.A. Winnubst*, G.S.A.M. Theunissen, M.M.R. Boutz, A.J. Burggraaf

*Corresponding author for this work

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2 Citations (Scopus)

Abstract

Grain growth and densification is described during pressureless sintering of nanocrystalline tetragonal zirconia compacts, doped with various amounts of yttria and/or ceria. All powders have a crystalline size of 8 nm and show an identical aggregate and agglomerate structure. During non-isothermal sintering up to 1050°C no significant difference in grain growth and densification is observed. Isothermal sintering for 6 hours at 1050°C of yttria doped tetragonal zirconia results in a dense ceramic with a grain size of 60 nm. At temperatures ≥ 1050°C ceria doped zirconia shows a stronger grain growth and a lower densification rate if compared with yttria doped zirconia. The effect of dopant on grain growth at higher temperatures is explained in terms of a difference in segregation behaviour of the solute atoms and consequently a difference in grain boundary migration due to 'drag control'.

Original languageEnglish
Title of host publicationStructural Ceramics Processing, Microstucture and Properties
Subtitle of host publicationproceedings of the 11th Risø International Symposium on Metallurgy and Materials Science, 3-7 September 1990
EditorsJ.J. Bentzen
Place of PublicationRoskilde, Denmark
PublisherRisø National Laboratory
Pages523-528
Number of pages6
ISBN (Print)8755016626
Publication statusPublished - 1990
Event11th Risø International Symposium on Metallurgy and Materials Science 1990 - Roskilde, Denmark
Duration: 3 Sep 19907 Sep 1990
Conference number: 11

Publication series

NameProceedings of the Risø International Symposium on Metallurgy and Materials Science
PublisherRisø National Laboratory
Volume11
ISSN (Print)0108-8599

Conference

Conference11th Risø International Symposium on Metallurgy and Materials Science 1990
CountryDenmark
CityRoskilde
Period3/09/907/09/90

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Winnubst, A. J. A., Theunissen, G. S. A. M., Boutz, M. M. R., & Burggraaf, A. J. (1990). Microstructure development during sintering of nanocrystalline tetragonal zirconia. In J. J. Bentzen (Ed.), Structural Ceramics Processing, Microstucture and Properties: proceedings of the 11th Risø International Symposium on Metallurgy and Materials Science, 3-7 September 1990 (pp. 523-528). (Proceedings of the Risø International Symposium on Metallurgy and Materials Science; Vol. 11). Roskilde, Denmark: Risø National Laboratory.