| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Emergent Materials under Extremes and Decisive In Situ Characterizations
|
| Presentation Title |
Investigations of Materials under Extreme Hydrothermal Conditions Using Synchrotron and Complementary Techniques |
| Author(s) |
Robert Mayanovic, Diwash Dhakal, Nadib Akram, Jason Baker, Xiaofeng Guo, Hakim Boukhalfa, Artas Migdissov, Cheng-Jun Sun, Hongwu Xu |
| On-Site Speaker (Planned) |
Robert Mayanovic |
| Abstract Scope |
Recent advances in synchrotron techniques have given rise to unprecedented growth in studies of materials under extreme conditions. The in-situ measurements afforded by these techniques have increased our fundamental understanding of how extremes in pressure (P) and/or temperature (T) affect phase transformations, the nature of the chemical bond, non-equilibrium phase behavior and other properties of materials. The diamond anvil cell has proven to be an indispensable tool for in-situ studies of materials at extreme PT conditions. Several applications of in-situ synchrotron techniques to the study of materials in extreme environments will be discussed. Examples of studies featured include in-situ SAXS and WAXS measurements made on mesoporous metal oxides and in-situ XAS and high-energy x-ray scattering PDF analysis of aluminosilicate melts under extreme hydrothermal conditions. Complementary in-situ XAS and Raman studies of aqueous uranyl-chloride complex formation and speciation, for a range of Cl– concentrations, at high PT conditions are also described. |