Utilizing Modern FIB/SEM Technology and EDS for 3D Imaging of Hydrated Alite and its Pore Space

  • The exploration of cementitious materials using scanning electron microscopes (SEM) is mainly done using fractured or polished surfaces. This leads to high-resolution 2D-images that can be combined using EDX and EBSD to unveil details of the microstructure and composition of materials. Nevertheless, this does not provide a quantitative insight into the three-dimensional fine structure of forThe exploration of cementitious materials using scanning electron microscopes (SEM) is mainly done using fractured or polished surfaces. This leads to high-resolution 2D-images that can be combined using EDX and EBSD to unveil details of the microstructure and composition of materials. Nevertheless, this does not provide a quantitative insight into the three-dimensional fine structure of for example C-S-H phases. The focused ion beam (FIB) technology can cut a block of material in thin layers of less than 10 nm. This gives us a volume of 1000 μm³ with a voxel resolution of down to 4 x 4 x 10 nm³. The results can be combined with simultaneously acquired EDX data to improve image segmentation. Results of the investigation demonstrate that it is possible to obtain close-to-native 3D-visualisation of the spatial distribution of unreacted C3S, C-S-H and CH. Additionally, an optimized preparation method allows us to quantify the fine structure of C-S-H phases (length, aspect ratio, …) and the pore space.show moreshow less

Download full text files

Export metadata

Metadaten
Document Type:Conference Proceeding
Author:Dipl.-Ing. Florian KleinerORCiD, Dr.rer.nat. Christiane RößlerORCiDGND
DOI (Cite-Link):https://doi.org/10.25643/bauhaus-universitaet.4455Cite-Link
URN (Cite-Link):https://nbn-resolving.org/urn:nbn:de:gbv:wim2-20210702-44555Cite-Link
Parent Title (English):ERICA-CASH II Final Converence
Language:English
Date of Publication (online):2021/01/24
Date of first Publication:2021/01/24
Release Date:2021/07/02
Publishing Institution:Bauhaus-Universität Weimar
Institutes and partner institutions:Fakultät Bauingenieurwesen / Professur Werkstoffe des Bauens
Pagenumber:2
Tag:EDX; Focussed Ion Beam; SEM; alite; energy dispersive X-ray spectroscopy
GND Keyword:Rasterelektronenmikroskop; Alit
Dewey Decimal Classification:500 Naturwissenschaften und Mathematik
BKL-Classification:51 Werkstoffkunde / 51.60 Keramische Werkstoffe, Hartstoffe
Licence (German):License Logo Creative Commons 4.0 - Namensnennung-Nicht kommerziell (CC BY-NC 4.0)