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Meeting Materials Science & Technology 2020
Symposium 2020 Undergraduate Student Poster Contest
Presentation Title Analysis of High Entropy Ceramics Prepared via Steric Entrapment and Solid-state Sintering Methods: Crystal Structure
Author(s) Madeline Loveday, Matheus Pianassola, Merry Koschan, Charles L. Melcher, Mariya Zhuravleva
On-Site Speaker (Planned) Madeline Loveday
Abstract Scope This project was designed to evaluate phase formation of high-entropy ceramics made via one of two synthesis methods: solid-state sintering or steric entrapment. Powder x-ray diffraction was used for phase identification. The compositions studied are five-component rare-earth aluminum garnets or perovskites with the general formula RE3Al5O12 and REAlO3, respectively, where RE represents an equiatomic combination of five rare-earth elements. Three combinations were selected for study: (Lu, Yb, Y, Tb, Gd), (Lu, Yb, Y, Tb, Eu), and (Lu, Yb, Y, Eu, Nd). Parameters such as crystallization temperature and PVA dissolution methods were studied to optimize steric entrapment for these materials. The results of this research will be used to inform future precursor synthesis parameters for use in future crystal growth via the micro-pulling down method.


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