Authors:
Vignesh Mohan (Technische Universitaet Wien, Austria)
Filip Stankovic (Technische Universitaet Wien, Austria)
Alexander Prinz (Technische Universitaet Wien, Austria)
Christian Gierl-Mayer (Technische Universitaet Wien, Austria)
Kevin Ouda (Huawei Austria, Austria)
Christoph Vogler (Huawei Austria, Austria)
Abstract:
Powder metallurgy presents an attractive approach for producing Soft Magnetic Composites (SMCs). Compaction is essential, yet it also introduces residual stress that can negatively impact magnetic performance, especially at high frequencies. Heat treatment is an effective stress relief technique. This study investigates three Fe-based compositions (FeNi, FeSiAl, and FeNiMo) and their responses to heat treatment (temperature and cooling rate). Core loss and magnetic permeability (up to 500 kHz) are used to assess the effectiveness of heat treatment parameters. The results reveal that heat treatment is highly dependent on alloy composition, temperature & cooling rate, among other factors, highlighting the combined influence of multiple factors on stress relief and magnetic properties. These findings highlight key processing-property relationships that guide process design for SMCs in high-frequency applications, where even small variations in heat treatment can have critical implications for performance.
DOI:
https://doi.org/10.59499/EP267157042
