Berlin 2015 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 40: Nanomaterials II: Mechanical Properties

MM 40.5: Vortrag

Mittwoch, 18. März 2015, 17:00–17:15, H 0107

X-ray nanodiffraction meets materials science — •Christina Krywka¹, Stephan Roth², and Müller Martin¹ — ¹Helmholtz-Zentrum Geesthacht, Max-Planck-Straße 1, Geesthacht D-21502 — ²DESY, Notkestraße 85, Hamburg D-22607

The Nanofocus Endstation of beamline P03 (PETRA III, Hamburg) is operated jointly by Helmholtz Zentrum Geesthacht and the University of Kiel, and is one of the very few synchrotron endstations providing the experimental conditions for scanning X-ray nanodiffraction. This technique, in turn, is an excellent tool for materials science. It readily serves structural information with sub-micrometer spatial resolution from crystalline and semi-crystalline materials (metals, biomaterials, synthetic compounds) for the retrieval of e.g. grain orientation, residual stress profiles, crystal structure or texture. Because of the long focal distance focusing, the wide energy range of the P03 beamline and a hexapod based positioning system, high resolution nanodiffraction experiments can be performed on strongly absorbing metallic samples and in extended sample environments, using a beam with a size of only 350 nm * 250 nm, generated using a long focal distance focusing system.

The strong focus on materials science at P03 is demonstrated by the wide range of experiments already performed with in situ sample environments: pressure, indentation force, tensile stress, fluid shear, magnetic fields - all of these parameters were successfully modified in situ and combined with the high spatial resolution provided by nanofocused beam.