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MM: Fachverband Metall- und Materialphysik

MM 20: Poster Session I

MM 20.1: Poster

Dienstag, 24. März 2009, 14:45–16:30, P4

Radiotracer Diffusion of Iron and Phosphorus in Sintered Iron Powders — •Deniz Yüksel, Sergiy Divinski, and Gerhard Wilde — Institut für Materialphysik, Universität Münster, Germany

Many technological applications require materials with both, good magnetic properties, e.g. fast change of polarisation and high magnetic saturation, and excellent mechanic properties, i.e. large Vickers hardness and high tensile yield stress, at the same time. A strategy for obtaining such beneficial property combination at reasonable materials costs is based on alloying of iron with phosphorus and silicon. We applied a powder metallurgical route for initial materials synthesis. The metal powders were then compacted and sintered. In order to optimize the sintering process, the diffusion kinetics of iron and particularly of the alloying elements has to be known. We investigated the diffusion of ⁵⁹Fe and ³²P in sintered Fe-P materials as a function of the sintering parameters. The results are discussed with respect to the applicability of the alloys for magnetic applications.