Soft Magnetic Properties and Mass Producibility of Fe-B-based Nanocrystalline Alloys Prepared by Ultra-rapid Annealing

Soft magnetic materials (SMMs) are extensively used in electronic devices such as electric motors and power inverters. The demand for these devices has surged in recent years driven by the rapid growth of green energy sectors, including electric vehicles, aviation and wind energy. Consequently, the need for high energy-dense and energy-efficient SMMs has risen considerably to enhance the economic and environmental performance of these low-carbon-emission applications. One of the most promising approaches to meet this demand is to replace the traditional Fe-Si core materials with Fe-based nanocrystalline alloys, which offer comprehensive and superior soft magnetic properties. In this thesis, the effects of additives and processing techniques on the soft magnetic properties of Fe-B based nanocrystalline alloys are investigated with emphasis placed on the potential of mass-producibility.