About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Characterization of Materials through High Resolution Coherent Imaging
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Presentation Title |
Internal Strain Changes of Pt Nanoparticles in Response to the High Pressure in Diamond-anvil Cell |
Author(s) |
Stephane Labat, Sarah Yehya, Marie-Ingrid Richard, Felisa Berenguer, Pierre Fertey, Steven Leake, Bjorn Wehinger, Mor Levi, Eugen Rabkin, Mohamed Mezouar |
On-Site Speaker (Planned) |
Stephane Labat |
Abstract Scope |
Tremendous novel properties and new forms of materials have been revealed exclusively under high-pressure. Measuring and understanding the internal strain changes in response to the external pressure produces critical information to unveil the origin of unconventional behavior of crystalline materials in high-pressure environments.
We have performed in-situ experiments in diamond-anvil cells (DACs) combining high-pressure and Bragg Coherent Diffraction Imaging. The 33.169 keV incident X-ray beam has been focused to a size of 1 x 1 µm² using a KB mirror and the diffracted X-rays have been recorded by an Eiger9M detector installed at 2 m from the sample. The strain evolution and physical deformation from a single nanoscale crystal of Platinum have been tracked for 5 different levels of pressure, ranging between 0.6 and 7 GPa. It evidences the ability to visualize large inhomogeneity with high spatial resolution (15 nm) and prominent strain sensitivity (0.02 %). |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Characterization, Nanotechnology |