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MAPEX Core Facility

3D Materials Analytics

  • Volume reconstruction of Neolithic potsherds

    What we do

    We use X-rays to non-destructively inspect the three-dimensional distribution of matter inside the object of investigation

    © Wolf-Achim Kahl / University of Bremen
  • Volume reconstruction and slice of a lightweight aggregate

    What we do

    We use X-rays to non-destructively inspect the three dimensional distribution of matter inside the object of investigation

    © Wolf-Achim Kahl / University of Bremen
  • Colored volume reconstruction of fish bones

    What we do

    We use X-rays to non-destructively inspect the three dimensional distribution of matter inside the object of investigation

    © Wolf-Achim Kahl / University of Bremen
  • Volume rendering of submarine volcanic ash particle

    What we do

    We use X-rays to non-destructively inspect the three dimensional distribution of matter inside the object of investigation

    © Wolf-Achim Kahl / University of Bremen
  • Volume reconstruction of a four rooted maxillary first molar

    What we do

    We use X-rays to non-destructively inspect the three dimensional distribution of matter inside the object of investigation

    © Wolf-Achim Kahl / University of Bremen

3D X-ray microscopy & 3D X-ray microtomography

Our methods are based on the detection and subsequent localization of the degree of attenuation of the incident X-rays in the sample. The attenuation of X-rays by matter depends on both the chemical elements it consists of as well as the material density. The information about the varied X-ray absorption is encoded as grey values in the black-and-white images. The volume reconstruction facilitates, e. g., visualization of fabric compounds as 3D models, or preparation of virtual thin sections in any desired direction.

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What kind of result do I get?

The result of our non-destructive 3D X-ray analysis is the reconstructed spatial distribution of X-ray attenuation within the object, in the form of a digital image stack or as an image volume. Each image consists of voxels (volumetric pixels) and allows quantitative analyses of volume and surface properties, or size distributions of different fabric compounds, etc. In addition, the transmission images can be supplied. Any analysis of the tomography data is possible in the context of scientific cooperation.

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Area responsible

Prof. Dr. Wolfgang Bach

Application Scientist

Dr. Wolf-Achim Kahl

Lab Manager 3D X-Ray Microscope
MAPEX Center for Materials and Processes
University of Bremen 

GEO-Building, Room 5070
Klagenfurter Stra?e 2-4, D-28359 Bremen
Tel.   +49 421 218 65408
Fax   +49 421 218 65429
Email: wakahlprotect me ?!uni-bremenprotect me ?!.de
https://www.hmi.uni-bremen.de/Kahl/kahl_home.html

Usage Regulation and fees

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Our key instruments

View inside X-ray microscope cabinet
© Ulrich Rei? / Leibniz IWT

Zeiss Xradia 520 Versa
3D X-ray microscope

  • max. 10W, 160 kV
  • resolution 0.3 to 25 ?m per voxel
  • Sample size ca. <1-50 mm
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View of ProCon CT-ALPHA
© Wolf-Achim Kahl / University of Bremen

ProCon CT-ALPHA
Micro X-ray computed tomograph

  • max. 50W, 190 kV
  • resolution 1-35 ?m per voxel
  • Sample size 1-100 mm
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Phoenix-xray v|tome|x m
© BIAS

Phoenix-xray v|tome|x m
Micro X-ray computed tomograph

  • 2 tubes: 320 W, 240 kV/15 W, 180 kV
  • resolution (2 tubes): >3 ?m / <1 ?m
  • Sample size: 1-60 mm
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More available instruments

Current instrumentation belonging to MAPEX-CF can be found in the Instrument Database of the MAPEX Center for Materials and Processes.

A click on the logo will lead you to the database.

Research Highlights

Figure from the publication
© 2023 GeoScienceWorld
3D Materials Analytics|

Timing of carbon uptake by oceanic crust determined by rock reactivity

Elmar Albers, Svenja J?ns, Axel Gerdes, Andreas Klügel, Christoph Beier, Simone A. Kasemann, Wolfgang Bach

Geology 51 (2023): 875

https://doi.org/10.1130/G51238.1

Carbonate formation during the alteration of oceanic crust is a global CO2 sink. Its timing and controls are not well understood,…

[Translate to English:]
© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license
3D Materials Analytics|

Gas Atomization of Duplex Stainless Steel Powder for Laser Powder Bed Fusion

Chengsong Cui, Felix Stern, Nils Ellendt, Volker Uhlenwinkel, Matthias Steinbacher, Jochen Tenkamp, Frank Walther, Rainer Fechte-Heinen

Materials 16 (2023): 435

https://doi.org/10.3390/ma16010435

Duplex stainless steel powders for laser additive manufacturing have not been developed extensively.…

The Picture of Enhanced weathering in the seabed: Rapid olivine dissolution and iron sulfide formation in submarine volcanic ash (2022)
© Mineralogical Society of America
3D Materials Analytics| Spectroscopy|

Enhanced weathering in the seabed: Rapid olivine dissolution and iron sulfide formation in submarine volcanic ash

Wolf-Achim Kahl, Andreas Klügel, Wolfgang Bach, Mangir Murshed

American Mineralogist 107 (2022): 1668–1680

https://doi.org/10.2138/am-2022-8057

In basaltic volcanic ash recovered from a seamount at 3000 m water depth, we discovered marcasite and pyrite precipitation within cavities that formed…

Updated by: Wolf-Achim Kahl, MAPEX
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