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Lab-based in situ nanoCT as a tool for the 3D structural and mechanical characterization of metamaterials

Debastiani, Rafaela ORCID iD icon 1,2,3; Kurpiers, Chantal 3,4; Schwaiger, Ruth 3,5; Gumbsch, Peter 1,3,6
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)
2 Karlsruhe Nano Micro Facility (KNMF), Karlsruher Institut für Technologie (KIT)
3 3D Matter Made to Order (3DMM2O), Karlsruher Institut für Technologie (KIT)
4 Institut für Angewandte Materialien – Werkstoff- und Grenzflächenmechanik (IAM-MMI), Karlsruher Institut für Technologie (KIT)
5 Forschungszentrum Jülich (FZJ)
6 Institut für Angewandte Materialien – Zuverlässigkeit und Mikrostruktur (IAM-ZM), Karlsruher Institut für Technologie (KIT)

Abstract:

The lab-based X-ray microscope Xradia 810 Ultra with mechanical in situ testing, here referred to as nanoCT, is a versatile tool for structural characterization of complex 3D samples down to 50 nm resolution with and without loading. The load stage is mounted on the CT rotation stage and can exert a maximum force of 0.8 N in compression and indentation experiments. This allows for the observation of microstructural changes as a function of mechanical load (and time). With its low energy X-ray source (Cr source, 5.4 keV), absorption and Zernike phase contrast, the nanoCT configuration is ideal for characterizing polymeric metamaterials at high spatial resolution.
Polymeric tetrahedral metamaterials manufactured using 3D direct laser writing method were characterized using the in situ nanoCT before and at different levels of loading. Differences in the structures were obtained scanning the samples in absorption and phase contrast modes, using a field of view of 65 μm and a voxel size of (128 nm)³. While the absorption contrast scan provides suitable images for the segmentation and the digital volume correlation, the phase contrast enhances the pores and defects within the microstructures. ... mehr


Volltext §
DOI: 10.5445/IR/1000148747
Veröffentlicht am 18.07.2022
Cover der Publikation
Zugehörige Institution(en) am KIT 3D Matter Made to Order (3DMM2O)
Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Institut für Angewandte Materialien – Werkstoff- und Grenzflächenmechanik (IAM-MMI)
Institut für Angewandte Materialien – Zuverlässigkeit und Mikrostruktur (IAM-ZM)
Publikationstyp Poster
Publikationsdatum 13.07.2022
Sprache Englisch
Identifikator KITopen-ID: 1000148747
HGF-Programm 43.31.01 (POF IV, LK 01) Multifunctionality Molecular Design & Material Architecture
Veranstaltung International Conference on Programmable Materials (ProgMatCon 2022), Berlin, Deutschland, 12.07.2022 – 14.07.2022
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