|About this Abstract
|MS&T23: Materials Science & Technology
|Ceramics for New Generation Nuclear Energy System Application
|Microstructure and Mechanical Properties of Ceramics in Y-Ti-O System
|Lingfeng He, Xiaofei Pu, Eitan Hershkovitz, Timothy Yoo, Honggyu Kim, Kaustubh Bawane, Fidelma Giulia Di Lemma, Tadachika Nakayama, Hisayuki Suematsu, Koichi Niihara
|On-Site Speaker (Planned)
Fluorite-based compounds, such as pyrochlore and defect fluorite-type compounds, have promising applications in the nuclear industry as nuclear fuel, inert fuel matrix, and nuclear waste forms. For instance, Y2Ti2O7 pyrochlore in the Yi-Ti-O system is considered a viable option for the immobilization of high-level radioactive wastes. In addition, Y–Ti–O nanoparticle dispersion-strengthened ferritic steels exhibit remarkable strength and radiation resistance, making them highly desirable for advanced reactor materials. The nanostructures within these materials range from coherent solute-enriched clusters to near stoichiometric complex oxides, such as Y2TiO5 and Y2Ti2O7. However, the distinction between pyrochlore and fluorite structures of Y-T-O has been challenging in prior literature, making it difficult to establish robust structure-property relationships for this material system. To address this issue, we utilized a combination of multimodal characterization techniques and mechanical testing techniques to elucidate the structure, composition, and mechanical properties of synthesized Yi-Ti-O ceramics.