Dresden 2014 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 27: Transport I - Materials/Methods
MM 27.1: Talk
Tuesday, April 1, 2014, 11:45–12:00, IFW B
Studying spatially resolved atomic diffusion processes using X-rays - atomic-scale X-ray photon correlation spectroscopy and its application to metallic alloys — •Markus Stana1, Michael Leintner2, Manuel Ross1, and Bogdan Sepiol1 — 1Universität Wien, Fakultät für Physik, Boltzmanngasse 5, 1090 Wien, Austria — 2Technische Universität München, Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM II), 85747 Garching, Germany
In the recent years our group succeeded in studying spatially resolved diffusion processes on the atomic scale by extending X-ray photon correlation spectroscopy (XPCS) to large scattering angles. In my talk I will give an overview of this new technique and present the results we achieved for binary metallic systems. Special attention will be given to solid solutions (Ni-Pt) and intermetalic phases like B2 (Fe-Al) and L12 (Cu-Au, Ni-Pt). I will conclude by briefly showing that this technique can also shed light on atomic motion in noncrystalline systems like glasses.
This work was financially supported by the Austrian Science Fund (FWF) P-22402.