Time-resolved in-situ and in-operando tomography is an increasingly important tool in materials research. It is applicable to a wide range of topics, from metallurgy over battery research to biology and many more. Due to recent improvements in temporal and spatial resolution, real-time tomography with acquisition rates of 25 full tomograms per second (tps) and above (which we call „tomoscopy“) could be used to observe processes in detail whose dynamic evolution did not allow to properly resolve them previously. As an example we present the growth and evolution of liquid metal foams to learn more about the mechanisms of bubble formation, growth and degradation. We study also the solidification kinetics of Al-based casting alloys, which has a strong influence on the solidified material‘s microstructure and properties. The experiments are performed at the TOMCAT beamline of the Swiss Light Source facility in Villigen, Switzerland and the EDDI beamline of the electron storage ring BESSY II in Berlin, Germany, which additionally offers the combination of time-resolved tomography with simultaneous energy-dispersive diffraction, allowing to correlate the structural or morphological changes with changes in chemical composition or phase transformations.
|Title||X-ray tomoscopy: beyond real-time tomography|
Left: time-resolved in-situ tomography setup installed at the EDDI instrument. Right: subsequent tomograms of Al alloy foam precursor granule with colored bubbles, each separated by only 39 ms.
|First name||Paul H.|
Applied Materials, Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany; Institute for Materials Science and Technology, Technische Universität Berlin, Germany
|Session||13. Materials characterization I|
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