With the high-resolution X-ray microscope Zeiss Xradia 620 Versa, tomographies similar to those used in medicine can now be generated at the ZBT. In this way, the examined objects can be measured as 3D models. Since different materials absorb X-rays to different degrees, the measurement shows where areas of different density or different elements are located in the object.

For example, components can be checked for air inclusions or inhomogeneities in the material composition. Another application scenario is the investigation of structural change of gas diffusion layers caused by the temperature drop of a fuel cell below the freezing point. Of particular interest for polymer electrolyte membrane fuel cells is also the investigation of the water balance in the cell, as the X-ray tomogram reveals where droplets form and water accumulates.

"In the medium term, we will also expand our X-ray microscope to be able to operate fuel cells within the microscope, that is, to perform operando measurements," explains ZBT scientist Dr Laura Tropf. "We are already looking forward to many exciting measurements and new insights that we will gain with the help of the X-ray technology!"

The X-ray microscope was procured in the course of the HyTechLab4NRW project. The project is funded by the European Regional Development Fund (ERDF) and the state of North Rhine-Westfalia.

Department of New Materials and Technologies