About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Neutron and X-ray Scattering in Materials Science
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Presentation Title |
In Situ High Pressure Neutron Scattering for Materials Characterization |
Author(s) |
Bianca Haberl, Mary-Ellen Donnelly, Malcolm Guthrie, Garrett E. Granroth, Reinhard Boehler |
On-Site Speaker (Planned) |
Bianca Haberl |
Abstract Scope |
While high pressure enables the formation of novel materials with unique properties, in situ neutron scattering gives unique insight into their formation mechanisms and characteristics. In situ high pressure neutron scattering has, however, been limited in maximum pressures due to large sample volumes required. Recent developments at the Spallation Neutron Source aim to overcome these limitations and I will highlight two recent key breakthroughs here. First, high pressure spectroscopy was performed at the ARCS spectrometer in a Paris-Edinburgh cell up to 16 GPa. Interesting insights into the pressure-induced metallization of germanium and the subsequent formation of a useful metastable polymorph with desirable electronic properties are discussed. Secondly, neutron diamond anvil cell developed for the SNAP diffractometer and capable of megabar diffraction, are used to characterize metal superhydrides under pressure. This is of particular relevance in the understanding of record-breaking high Tc superconductivity in superhydrides and recent results will be reported. |
Proceedings Inclusion? |
Planned: |
Keywords |
Phase Transformations, Characterization, |