About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
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Presentation Title |
In-situ Nano-indentation of a Pt Nanoparticle Combined with Bragg Coherent X-ray Diffraction Imaging. |
Author(s) |
Sarah Yehya, Thomas Cornelius, Marie-Ingrid Richard, Felisa Berenguer, Eugen Rabkin, Olivier Thomas, Stéphane Labat |
On-Site Speaker (Planned) |
Sarah Yehya |
Abstract Scope |
Defects in nanocrystals can dramatically alter the physical and chemical behavior of materials. The understanding of defect behavior is thus crucial to enhance material properties. Here we report on defect characterization in a 400 nm Pt nanoparticle from synchrotron experiment that combines in-situ nano-indentation using a custom-built AFM with Bragg Coherent X-ray Diffraction Imaging. The latter is an innovative lens-less imaging technique that allows for 3D characterization of morphology and strain with a 10 nm 3D spatial resolution and picometer sensitivity of lattice displacement field. The coherent diffraction pattern of a single 111 reflection is recorded before, during and after indentation. The reconstructed Pt particle in 3D evidences that defects were induced during indentation and the stress required to generate such defects was determined. Furthermore, multiple-Bragg reflections were recorded on the same particle to determine the full 3D strain tensor. This result is confirmed by finite element simulation. |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, Other, Other |