About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Powder and Ceramic Materials Science
|
Presentation Title |
Dual Cubic Perovskite Phases in Macro-Equimolar High Entropy Oxides |
Author(s) |
Imrongnaro Longkumer, Ashutosh Suresh Gandhi |
On-Site Speaker (Planned) |
Imrongnaro Longkumer |
Abstract Scope |
The multicomponent equimolar oxides (MEO) ceramics having 6-8 different components have been synthesized using the solution combustion method. The chosen cations are Al3+, Ba2+, Ca2+, Cr3+, Gd3+, La3+, Sr2+, Ti4+ and Zr4+. The cations are selected for each composition based on the Pauling’s rules and having the theoretical calculation of Goldschmidt’s tolerance factor between 0.9 to 1.2. For all the compositions, we obtain two phases with the cubic perovskite structure of different lattice parameters. A couple of compositions contain additional phases. The formation of the dual cubic perovskite phases in each composition is examined. Structure determination from powder X-ray diffraction was carried out using Rietveld refinement. HRTEM imaging and EDS was used to identify the elemental composition of the dual cubic phases. Dielectric, fracture toughness and thermal conductivity properties were measured and found to show interesting results. |
Proceedings Inclusion? |
Planned: |
Keywords |
Ceramics, Characterization, High-Entropy Alloys |