Dresden 2006 – wissenschaftliches Programm

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MM: Metall- und Materialphysik

MM 37: Nanostructured Materials I

MM 37.6: Vortrag

Donnerstag, 30. März 2006, 16:00–16:15, IFW D

Characterization of the Microstructure and Texture of Nanostructured Electrodeposited CoNi by use of Electron Backscatter Diffraction (EBSD) — •Alice Bastos, Stefan Zaefferer, and Dierk Raabe — Max-Planck-Institut für eisenforschung, Max-Planck-Strasse 1, D-40237 Duesseldorf

A Co-20at%Ni polycrystal produced by electrodeposition has been investigated in planar and cross sections using orientation microscopy in a high resolution scanning electron microscope and focused ion beam microscope. The local crystallographic texture, grain size, amount of phases, and grain boundary character were characterized by electron backscatter diffraction (EBSD). This technique appears to be ideal for accomplishing a detailed microstructure characterization, particularly regarding the crystallographic character of the boundaries, which plays a special role in such nanostructured materials. Exploring the limits of the spatial resolution of the EBSD we present a detailed study of the microstructure and facilitate in this way the understanding its complexity. Additionally a combination of EBSD technique with a serial section method using a focused ion beam microscope (3D-EBSD) was applied in order to study the boundary character throughout the thickness of the electrodeposited sample. The crystallographic relationship between neighboring grains was investigated to gain access to the understanding of the microstructure evolution and local texture development in connection with the deposit growth.