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Meeting Materials Science & Technology 2019
Symposium Phase Transformations in Ceramics: Science and Applications
Presentation Title In-Situ Phase Diagram Determination of the HfO2-Ta2O5-TiO2 Ternary Up to 3000 ˚C
Author(s) Scott J. Mccormack, Ben Hulbert, Richard Weber, Sergey Ushakov, Alexandra Navrotsky, Waltraud Kriven
On-Site Speaker (Planned) Scott J. Mccormack
Abstract Scope Ceramic equilibrium phase diagrams have proven to be difficult to produce for materials above 1500 ˚C. We demonstrate that in-situ X-ray diffraction on laser-heated, levitated samples can be used to elucidate phase fields. In these experiments, solid spherical samples were suspended and rotated by a gas stream through a conical nozzle levitator, heated by a 400 W CO2 laser at beamline 6-ID-D of the Advanced Photon Source at Argonne National Laboratory. X-ray diffraction patterns suitable for Rietveld refinement were collected at 100 ˚C temperature intervals and were used to determine the phase fraction of phases present. The temperature of each phase was determined based on thermal expansion data collected by powder diffraction in conjunction with the Quadrupole Lamp Furnace (QLF) at beamline 33-BM-C. HfO2-Ta2O5-TiO2 was investigated as an example system due to its high melting points and application in refractories and electronics.
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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