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Meeting Materials Science & Technology 2019
Symposium Phase Transformations in Ceramics: Science and Applications
Presentation Title Meso- and Micro-structural Design and Processing of Shape-Memory and Superelastic Bulk Ceramics
Author(s) Xiaomei Zeng, Noriaki Arai, Katherine T. Faber
On-Site Speaker (Planned) Katherine T. Faber
Abstract Scope Zirconia-based compositions that exhibit shape-memory and superelastic effects were documented more than 30 years ago. However, these effects were not successfully realized until the last decade when studies with micron- and sub-micron scale pillars and particles demonstrated that tetragonal-to-monoclinic transformation-induced fracture could be avoided. Inspired by the micropillar studies, we describe a strategy to produce bulk zirconia-based ceramics in which the transformation-generated fracture can be averted. Here we demonstrate that ceria-doped zirconia can be freeze-cast using fine temperature-gradient control to produce a cellular, honeycomb-like structure with aligned oligocrystalline cell walls. The resultant bulk shape-memory ceramics exhibit strengths of 25 MPa, strains of up to 7.5%, and complete reverse phase transformation on heating.
Proceedings Inclusion? Definite: At-meeting proceedings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Advances in Experimental Techniques for Investigating Microstructure Dependent Phase Transformations
Avoiding Transformation-induced Cracking in ZrO2 Shape-memory Ceramics: Constraints, Surfaces and Interfaces
Changes to the local environment during the entropic phase transformation in high entropy oxides.
Direct conversion of heat to electricity using first-order phase transformations in ferroelectrics
Effect of Microstructure on Cyclic Phase Transformation Behavior in Shape Memory Zirconia
Exploring 3-D Reciprocal Space: a Powerful Tool to Answer Basic and Applied Materials Science Questions at 33BM APS
Ferroelectric Phase Transition in Tungsten Trioxide Gas Sensors
First-principles investigation of phonon instabilities and displacive phase transitions in CaTiO3-perovskites
First principles investigation into the phase stability and enhanced hardness of TiN-ScN and TiN-YN alloys
In-Situ Observations of Phase Transformations on Individual Particles of a Cu/Fe Oxygen Carrier during High-Temperature Oxidation and Reduction Cycles
In-Situ Phase Diagram Determination of the HfO2-Ta2O5-TiO2 Ternary Up to 3000 ˚C
In-situ X-ray characterization of phase evolution during solid-state synthesis of multicomponent systems
In Situ Investigation of Stress-Induced Martensitic Transformation in Granular Shape Memory Ceramics
Influence of Annealing Temperature and Time on Phase Stability and Fracture Toughness of Rare-earth Stabilized Zirconia
Investigations on the glass transition and crystallisation behavior of glasses by oscillatory rheometry
Meso- and Micro-structural Design and Processing of Shape-Memory and Superelastic Bulk Ceramics
Phase Transformations in High-entropy, Lanthanide Oxides
Phase transitions in hollandite oxides with nanoscale chemical ordering
Precipitation in Metal-Ceramic Systems Under Reducing Conditions
Prediction of Diffusionless Phase Transformation by Determination of the Orientation Relationship, Shear, and Motif Translation with the Smallest Atom Shuffles
Pseudo-Single Crystal Growth of Cobalt Dititanate, an Entropy Stabilized Compound
Reactive Texturing of Yttria and Ceria TZP in a Strong Magnetic Field
Realizing novel defect ordering in yttria stabilized zirconia via ion radiation
Single Phase Spinel Produced from Powders of Alumina and Magnesia in Reactive Flash Sintering
The Effect of Zr4+ Co-Substitution on the Phase Transition and Thermal Expansion Properties of RENbO4 Materials (RE = La3+, Dy3+, Y3+)
Thermal Expansion and Phase Transformation Mechanism in the Lanthanide Di-titanate System
Topotactic Motif and Orientation Relation Extraction for Phase Transformations from In-Situ X-ray Powder Diffraction
Unraveling stress-induced structure evolution in functional oxides using in-situ neutron diffraction

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