Comet Calendar
Chemistry seminar - High Entropy Ceramics: Investigating localized structural effects on emerging properties (Speaker: Prof. Christina Rost, from James Madison University; Host: Dr. Toher)
Friday, November 4, 2022 3:30pm to 5pm
Event Details
Abstract: Many properties we observe in materials are a direct consequence of their composition and local structure. High entropy materials are a unique class of systems that do not have a primary composition; rather they contain a near-equimolar distribution of several elements— where no single element serves as host. Such compositional disorder is accompanied by a unique distribution of localized structural distortions that can have a profound effect on properties such as thermal conductivity, magnetic interaction, diffusion, and more. To date, high entropy metals and ceramics are gaining significant traction in the materials community as unique and interesting properties continue to emerge, from amorphous-like thermal conductivities to exotic magnetic states. In this talk, we present and discuss ongoing work on the local characterization of several high entropy compositions exhibiting crystal structures from rocksalts to Kagome lattices. In particular, the use of X-ray absorption fine structure (XAFS) is demonstrated to aid in understanding such disorder on the local level and how it may influence functional properties.
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Location
Sciences Building (SCI), 1.210
800 W. Campbell Road, Richardson, Texas 75080-3021
Department
- Natural Sciences & Mathematics
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Contact Information
- Dr. Hedieh Torabifard
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