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Title: Microstructure, crystallization and shape memory behavior of titania and yttria co-doped zirconia
Authors: Zeng, Xiao Mei
Du, Zehui
Schuh, Christopher A.
Tamura, Nobumichi
Gan, Chee Lip
Keywords: Crystallization
Elemental analysis
Shape memory effect
Titania doping
Issue Date: 2015
Source: Zeng, X. M., Du, Z., Schuh, C. A., Tamura, N., & Gan, C. L. (2016). Microstructure, crystallization and shape memory behavior of titania and yttria co-doped zirconia. Journal of the European Ceramic Society, 36(5), 1277-1283.
Series/Report no.: Journal of the European Ceramic Society
Abstract: Small volume zirconia ceramics with few or no grain boundaries have been demonstrated recently to exhibit the shape memory effect. To explore the shape memory properties of yttria doped zirconia (YDZ), it is desirable to develop large, microscale grains, instead of submicron grains that result from typical processing of YDZ. In this work, we have successfully produced single crystal micro-pillars from microscale grains encouraged by the addition of titania during processing. Titania has been doped into YDZ ceramics and its effect on the grain growth, crystallization and microscale elemental distribution of the ceramics have been systematically studied. With 5 mol% titania doping, the grain size can be increased up to ∼4 μm, while retaining a large quantity of the desired tetragonal phase of zirconia. Micro-pillars machined from tetragonal grains exhibit the expected shape memory effects where pillars made from titania-free YDZ would not.
ISSN: 0955-2219
DOI: 10.1016/j.jeurceramsoc.2015.11.042
Schools: School of Materials Science & Engineering 
Research Centres: Temasek Laboratories 
Rights: © 2015 Elsevier.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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