Authors:
Vignesh Mohan (1), Christian Gierl-Mayer (1), Elisabeth Rauchenwald (2), Christoph Vogler (2)
1- Insitute for Chemical Technology and Analysis, Technische Universität Wien, Vienna, Austria
1- HUAWEI TECHNOLOGIES AUSTRIA GmbH, Vienna, Austria
Abstract:
Soft Magnetic Composites (SMCs) are a class of ferromagnetic materials used for various applications. At high frequencies, they face significant eddy current losses. To limit these losses, their electrical resistivity must be increased. An effective way is to use pre-alloyed powders and insulated coatings (e.g. oxidation). However, pre-alloyed powders are more difficult to oxidize. In this paper, a successful approach is described. The responses of three Fe-based SMC powders to this approach are discussed using oxygen measurement (Leco) and SEM (Scanning Electron Microscopy) imaging. Oxygen measurements reveal different oxygen contents among the materials. This was expected, yet the oxidation time seems to make no difference to oxygen content. In SEM images, oxide layers are seen in the powders. Since this study aims to better understand the feasibility of oxidation as a coating mechanism, further analysis of the powders is limited.
DOI:
https://doi.org/10.59499/EP246284004
