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Title: Microstructure, crystallization and shape memory behavior of titania and yttria co-doped zirconia

Journal Article · · Journal of the European Ceramic Society
 [1];  [1];  [2];  [3]; ORCiD logo [1]
  1. Nanyang Technological Univ. (Singapore)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

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 paper, 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. Finally, micro-pillars machined from tetragonal grains exhibit the expected shape memory effects where pillars made from titania-free YDZ would not.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1379259
Alternate ID(s):
OSTI ID: 1250378
Journal Information:
Journal of the European Ceramic Society, Vol. 36, Issue 5; ISSN 0955-2219
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

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Effects of TiO 2 addition on microwave dielectric properties of Li 2 MgSiO 4 ceramics journal March 2018
Study of deformation mechanisms in flash-sintered yttria-stabilized zirconia by in-situ micromechanical testing at elevated temperatures journal February 2019
Review and Mapping of Parameters for the Early Stage Design of Adaptive Building Technologies through Life Cycle Assessment Tools journal May 2019
Enhanced shape memory and superelasticity in small-volume ceramics: a perspective on the controlling factors journal October 2017
Robust Cellular Shape‐Memory Ceramics via Gradient‐Controlled Freeze Casting journal September 2019