Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 55: Poster II

MA 55.72: Poster

Freitag, 4. April 2014, 10:30–13:30, P2

Analysis of Magnetic Flux in non–oriented Electrical Sheet — •Anna Brunner, Rudolf Schäfer, and Ludwig Schultz — IFW Dresden, Institut for Metallic Materials, Dpt. Magnetic Microstructures, Helmholtzstr. 20, D-01069 Dresden

Although non–oriented bulk magnetic material like electrical steel is traditionally used in motors, generators or other inductive applications, the mechanisms of flux propagation are so far unexplored. In this presentation we adapt a quasi domain model to describe flux propagation, especial across grain boundaries which are in general obstacles for the magnet flux. We wrote a program to calculate the quasi–domain combination with the smallest grain boundary charge for a given grain orientation towards a grain boundary. The grain orientation of the non–oriented iron–silicon samples was determined by EBSD (Electron BackScatter Diffraction). The domain movement at charged and uncharged grain boundary areas was observed with Kerr–microscopy. The examinations are exemplified at three grain boundaries (one between two grains of slight misorientation with respect to the surface, another one between two grains of strong misorientation with respect to the surface and a last one between a strongly and a slightly misoriented grain).